PRODUCT CATALOG & DESIGN GUIDE. Circuit Protection Products

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1 PRODUCT CATALOG & DESIGN GUIDE Circuit Protection Products

2 Littelfuse Circuit Prot Solutions Port DESIGN SUPPORT Consumer Electronics Telecom White Goods Medical Equipment TVSS and Power Live Application Design and Technical Support Tap into our expertise. Littelfuse engineers are available around the world to help you address design challenges and develop unique, customized solutions for your products. Product Sampling Programs Most of our products are available as samples for testing and verification within your circuit design. Visit Littelfuse.com or contact a Littelfuse product representative for additional information. Product Evaluation Labs and Services Littelfuse global labs are the hub of our new product development initiatives, and also provide design and compliance support testing as an added-value to our customers. OVERVOLTAGE SUPPRESSION TECHNOLOGIES (1-6) 1 1. TVS Diodes Suppress overvoltage transients such as Electrical Fast Transients (EFT), inductive load switching and lightning in a wide variety of applications in the computer, industrial, telecom and automotive markets. 2. Varistors Multiple forms, from Metal Oxide Varistors (MOVs) that suppress transient voltages to Multi-Layer Varistors (MLVs) designed for applications requiring protection from various transients in computers and handheld devices as well as industrial and automotive applications. 3. SIDACtor Devices Complete line of protection thyristor products specifically designed to suppress overvoltage transients in a broad range of telecom and datacom applications. 4. Gas Plasma Arrestors (GDTs) Available in small footprint leaded and surface mount configurations, Littelfuse GDTs respond fast to transient overvoltage events, reducing the risk of equipment damage. 5. SPA Silicon Protection Arrays Designed specifically to protect analog and digital signal lines from electrostatic discharge (ESD) and other overvoltage transients. 6. PulseGuard ESD Suppressors Available in various surface mount form factors to protect high-speed digital lines without causing signal distortion. 2 Visit

3 ection olio upplies Lighting General Electronics SWITCHING TECHNOLOGIES Switching Thyristors Solid-state switches used to control the flow of electrical current in applications, capable of withstanding rated blocking/ off-state voltage until triggered to on-state. ACCESSORIES In addition to our broad portfolio of circuit protection technologies, we offer an array of fuse holders including circuit board, panel or in-line wire mounted devices to support a wide range of application requirements OVERCURRENT PROTECTION TECHNOLOGIES (7-8) Positive Temperature Coefficient Devices (PTCs) Provide resettable overcurrent protection for a wide range of applications. 8. Fuses Full range including surface mount, axial, glass or ceramic, thin-film or Nano 2 style, fast-acting or SloBlo, MINI and ATO fuses. for more information.

4 Fuses As the #1 circuit protection company in the world Littelfuse offers the largest selection of fuses available, including surface mount, axial, glass or ceramic, thin-film or Nano 2 style, fast-acting or SloBlo, MINI and ATO fuses. In fact, many of our fuse products are the industry standard. Companies across the globe rely on Littelfuse circuit protection solutions to enhance the safety and reliability of their products, safeguard sensitive circuits and protect critical business assets. From popular consumer electronic devices like MP3 players, mobile phones and digital cameras, to home appliances, telecom infrastructure equipment and critical life saving medical equipment, Littelfuse has the right fuse product for virtually any application.

5 TABLE OF CONTENTS Introduction Detailed Data Sheet Indexes 2-5 Fuse Characteristics, Terms and Consideration Factors 6-8 Fuse Selection Guide 9-11 Standards Littelfuse Fuse Part Numbering System 15 Data Sheets: Surface Mount Fuses Low Profile Ceramic and SlimLine TM Surface Mount Fuses Nano Type Surface Mount Fuses and Fuseholder Assemblies /460 PICO SMF, 202/203 FLAT-PAK and 446/467 EBF Surface Mount / Thru-Hole Fuses Data Sheets: Radial Lead Fuses Micro and TR-3 Fuses TR-5 Fuses TE-5 Fuses Radial Lead Surface Mount Introduction Data Sheets: Axial Lead and Cartridge Fuses PICO / PICO II Axial Lead Fuses x 10 mm Axial Lead Fuses x 14.5 mm (2AG) Axial Lead & Cartridge Fuses x 20 mm Axial Lead & Cartridge Fuses x 32 mm (3AG/3AB) Axial Lead & Cartridge Fuses Axial Lead / Cartridge Data Sheets: Special Application Fuses 242 Series Barrier Network Fuse, 259 Series Safe-T-Plus Fuse and 481/482 Alarm Indicating Fuse and Fuseholder Special Application For information about Littelfuse fuseholders, automotive fuses and larger industrial fuses, please visit 1 Revised: Jan 12, 2009

6 Introduction to Circuit Protection Transientology Data Sheet Index: Organized By Fuse Series Series # Page # Series # Page # Series # Page # Series # Page # T T E XA To view current information about Littelfuse product series, visit #).html 2 Revised: Jan 12, 2009

7 Data Sheet Index: Organized By Fuse Type and Size Surface Mount Fuses Low Profile Ceramic High Temperature Surface Mount Fuses 437 series, 1206 Size, High Temperature, Fast-Acting, Lead-Free series, 0603 Size, High Temperature, Fast-Acting, Lead-Free series, 1206 Size, High Temperature, Fast-Acting, Lead-Free, High Current 25 Low Profile SlimLine TM Thin-Film Surface Mount Fuses 466 series, SlimLine TM 1206 Size, Very Fast-Acting, Lead-Free series, SlimLine TM 1206 Size, High Current Very Fast-Acting, Lead-Free series, SlimLine TM 1206 Size, Slo-Blo, Lead-Free series, SlimLine TM 0603 Size, Very Fast-Acting, Lead-Free series, SlimLine TM 0402 Size, Very Fast-Acting, Lead-Free 45 NANO 2 Surface Mount Fuses 448 series, NANO 2 Very Fast-Acting, Lead-Free series, NANO 2 Slo-Blo, Lead-Free /453 series, NANO 2 Very Fast-Acting /454 series, NANO 2 Slo-Blo series, NANO series, NANO series, NANO 2 250V Time-Lag series, NANO 2 250V UMF Fast-Acting series, NANO 2 250V UMF Time-Lag series, TeleLink E series, Enhanced TeleLink /154T series, NANO 2 OMNI-BLOK Fuse and Holder series, NANO 2 OMNI-BLOK Fuse and Holder T series, NANO 2 OMNI-BLOK Fuse and Holder series, NANO 2 OMNI-BLOK Fuse and Holder 103 Other (Leaded surface mount and through hole fuses) 459 series, PICO leaded surface mount fuse series, PICO leaded surface mount fuse series, FLAT-PAK leaded surface mount fuse, Fast-Acting series, FLAT-PAK leaded surface mount fuse, Slo-Blo series leaded surface mount fuse / 447 series leaded through hole fuse, Fast-Acting 123 > Section continued on next page. 3 Revised: Jan 12, 2009

8 Introduction to Circuit Protection Transientology Data Sheet Index: Organized By Fuse Type and Size (continued from previous page) Radial Lead Fuses Micro / TR-3 Fuses 262/268/269 Series, MICRO Very Fast-Acting Fuse (High-Reliability) /273/274/278/279 Series, MICRO Very Fast-Acting Fuse Series, TR-3, 50A@125V, Fast-Acting 135 TR-5 Fuses 370 Series, TR-5, 35A@250V, Fast-Acting Series, TR-5, 35A@250V, Time-Lag Series, TR-5, 50A@250V, Fast-Acting Series, TR-5, 50A@250V, Time-Lag Series, TR-5, A@250V, Time-Lag Extended Breaking Capacity Series, TR-5, 50A@300V, Time-Lag 159 TE-5 Fuses 369 Series, TE-5, 50A@300V, Time-Lag Series, TE-5, 50A@125V, Time-Lag Series, TE-5, 50A@65V, Fast-Acting Series, TE-5, 25A@250V, Time-Lag Series, TE-5, A@125V, Fast-Acting Series, TE-5, A@ 125V, Time-Lag Series, TE-5, 50A@125V, Time-Lag Series,TE-5, 50A@65V, Medium Time-Lag Series, TE-5, 50A@65V, Time-Lag 195 Axial Lead and Cartridge Fuses PICO & PICO II Axial Lead Fuses 251/253 Series, PICO II, Very Fast-Acting Fuse /276 Series, PICO, Very Fast-Acting Fuse Series, PICO II 250 Volt, Very Fast-Acting Fuse Series, PICO II, Time-Lag Fuse Series, PICO II, Time-Lag Fuse Series, PICO II, Slo-Blo Fuse /266/267 Series, PICO, Very Fast-Acting Fuse (High-Reliability) Series, PICO II, Very Fast-Acting Fuse x 10 mm Cartridge and Axial Lead Fuses 874 Series,Fast Acting Series,Slo-Blo Series,Fast Acting Series,Slo-Blo 243 > Section continued on next page. 4 Revised: Jan 12, 2009

9 Axial Lead and Cartridge Fuses (Continued from previous page) 4.5 x 14.5 mm (2AG) Catridge and Axial Lead Fuses 208 Series, UL Standard, 350V, Fast-Acting Series, UL Standard, 350V, Time-Lag /225 Series, UL Standard, Fast-Acting (Wider Amperage Range) /230 Series, UL Standard, Time-Lag (Wider Amperage Range)/Indicating x 20 mm Cartridge and Axial Lead Fuses 217 Series, IEC Standard, Low Breaking Capacity,(<A, Glass), 250V Fast-Acting Series, IEC Standard, Low Breaking Capacity,(<A, Glass), 250V Time-Lag Series, IEC Standard, Low Breaking Capacity, (<A, Glass), 250V Time-Lag, Surge Withstand XA Series, IEC Standard, Low Breaking Capacity, (<A, Glass), 250V Time-Lag, High I 2 t Series, IEC Standard, 250V, High Braking Capacity, (1500A, Ceramic) Fast-Acting Series, IEC Standard, 250V, High Braking Capacity (1500A, Ceramic) Time-Lag, Surge Withstand Series, Japanese Standard, 250V, Medium-Acting Series, UL Standard, 125V (10KA), Fast-Acting Series, UL Standard, 125V (10KA), Medium-Acting Series, UL Standard, 250V, Medium-Acting Series, UL Standard, 125V (10KA) or 250V (<A), Time-Lag Series, IEC Standard, 400Vdc/500Vac, Time-Lag x 32 mm (3AG/3AB) Cartridge and Axial Lead Fuses 312/318 Series, (UL Standard, Glass) Fast-Acting /315 Series, (UL Standard, Glass) Time-Lag /324 Series, (UL Standard, Ceramic, Higher Braking Capacity) Fast-Acting Series, (UL Standard, Ceramic, Higher Breaking Capacity) Very Fast-Acting /326 Series, (UL Standard, Ceramic, Higher Breaking Capacity) Time-Lag Series, (Glass) METI B Fuse Series, (UL Standard, Ceramic) Fast-Acting 337 Special Application Fuses 242 Series Barrier Network Fuse Series Safe-T-Plus Fuse Series Alarm Indicating Fuse Series Alarm Indicating Fuseholder 347 To view current information about Littelfuse product series, visit #).html 5 Revised: Jan 12, 2009

10 Introduction to Circuit Protection Transientology Fuse Characteristics, Terms and Consideration Factors The purpose of this introductory section is to promote a better understanding of both fuses and common application details within circuit design. The fuses to be considered are current sensitive devices designed to serve as the intentional weak link in the electrical circuit. Their function is to provide protection of discrete components, or of complete circuits, by reliably melting under current overload conditions. This section will cover some important facts about fuses, selection considerations and standards. The application guidelines and product data in this guide are intended to provide technical information that will help with application design. The fuse parameters and application concepts presented should be well understood in order to properly select a fuse for a given application. Since these are only a few of the contributing parameters, application testing is strongly recommended and should be used to verify performance in the circuit / application. Littelfuse reserves the right to make changes in product design, processes, manufacturing location and information without notice. For current Littelfuse product infomation, please visit our web site at AMBIENT TEMPERATURE: Refers to the temperature of the air immediately surrounding the fuse and is not to be confused with room temperature. The fuse ambient temperature is appreciably higher in many cases, because it is enclosed (as in a panel mount fuseholder) or mounted near other heat producing components, such as resistors, transformers, etc. BREAKING CAPACITY: Also known as interrupting rating or short circuit rating, this is the maximum approved current which the fuse can safely break at rated voltage. Please refer to the interrupting rating definition of this section for additional information. CURRENT RATING: The nominal amperage value of the fuse. It is established by the manufacturer as a value of current which the fuse can carry, based on a controlled set of test conditions (See RERATING). Catalog Fuse part numbers include series identification and amperage ratings. Refer to the FUSE SELECTION GUIDE section for guidance on making the proper choice. RERATING: For 25ºC ambient temperatures, it is recommended that fuses be operated at no more than 75% of the nominal current rating established using the controlled test conditions. These test conditions are part of UL/CSA/ANCE (Mexico) Fuses for Supplementary Overcurrent Protection, whose primary objective is to specify common test standards necessary for the continued control of manufactured items intended for 6 Revised: Jan 12, 2009 protection against fire, etc. Some common variations of these standards include: fully enclosed fuseholders, high contact resistances, air movement, transient spikes, and changes in connecting cablesize (diameter and length). Fuses are essentially temperature-sensitive devices. Even small variations from the controlled test conditions can greatly affect the predicted life of a fuse when it is loaded to its nominal value, usually expressed as % of rating. The circuit design engineer should clearly understand that the purpose of these controlled test conditions is to enable fuse manufacturers to maintain unified performance standards for their products, and he must account for the variable conditions of his application. To compensate for these variables, the circuit design engineer who is designing for trouble-free, long-life fuse protection in his equipment generally loads his fuse not more than 75% of the nominal rating listed by the manufacturer,keeping in mind that overload and short circuit protection must be adequately provided for. The fuses under discussion are temperature-sensitive devices whose ratings have been established in a 25ºC ambient. The fuse temperature generated by the current passing through the fuse increases or decreases with ambient temperature change. The ambient temperature chart in the FUSE SELECTION GUIDE section illustrates the effect that ambient temperature has on the nominal current rating of a fuse. Most traditional Slo-Blo Fuse designs use lower melting temperature materials and are, therefore, more sensitive to ambient temperature changes. DIMENSIONS: Unless otherwise specified, dimensions are in inches. The fuses in this catalog range in size from the approx chip size (.041 L x.020 W x.012 H) up to the 5 AG, also commonly known as a MIDGET fuse (13/32 Dia. x 11/2 Length). As new products were developed throughout the years, fuse sizes evolved to fill the various electrical circuit protection needs. The first fuses were simple, open-wire devices, followed in the 1890 s by Edison s enclosure of thin wire in a lamp base to make the first plug fuse. By 1904, Underwriters Laboratories had established size and rating specifications to meet safety standards. The renewable type fuses and automotive fuses appeared in 1914, and in 1927 Littelfuse started making very low amperage fuses for the budding electronics industry. The fuse sizes in following chart began with the early Automobile Glass fuses, thus the term AG. The numbers were applied chronologically as different manufacturers started making a new size: 3AG, for example, was the third size placed on the market. Other non-glass fuse sizes and constructions were determined by functional requirements, but they still retained the

11 length or diameter dimensions of the glass fuses. Their designation was modified to AB in place of AG, indicating that the outer tube was constructed from Bakelite, fibre, ceramic, or a similar material other than glass. The largest size fuse shown in the chart is the 5AG, or MIDGET, a name adopted from its use by the electrical industry and the National Electrical Code range which normally recognizes fuses of 9/16 x 2 as the smallest standard fuse in use. FUSE SIZES SIZE DIAMETER (Inches) LENGTH (Inches) 1AG 1/ / AG AG 1/ / AG 9/ / AG 13/ / AG 1/ / AG 1/ TOLERANCES: The dimensions shown in this catalog are nominal. Unless otherwise specified, tolerances are applied as follows. Tolerances do not apply to lead lengths: ±.010 for dimensions to 2 decimal places. ±.005 for dimensions to 3 decimal places. Contact Littelfuse should you have questions regarding metric system and fractional tolerances. FUSE CHARACTERISTICS: This characteristic of a fuse design refers to how rapidly it responds to various current overloads. Fuse characteristics can be classified into three general categories: very fast-acting, fast-acting, or Slo-Blo Fuse. The distinguishing feature of Slo-Blo fuses is that these fuses have additional thermal inertia designed to tolerate normal initial or start-up overload pulses. FUSE CONSTRUCTION: Internal construction may vary depending on ampere rating. Fuse photos in this catalog show typical construction of a particular ampere rating within the fuse series. FUSEHOLDERS: In many applications, fuses are installed in fuseholders. These fuses and their associated fuseholders are not intended for operation as a switch for turning power on and off. INTERRUPTING RATING: Also known as breaking capacity or short circuit rating, the interrupting rating is the maximum approved current which the fuse can safely interrupt at rated voltage. During a fault or short circuit condition, a fuse may receive an instantaneous overload current many times greater than its normal operating current. Safe operation requires that the fuse remain intact (no explosion or body rupture) and clear the circuit. Interrupting ratings may vary with fuse design and range from 35 amperes for some 250VAC metric size (5 x 20mm) fuses up to 200,000 amperes for the 600VAC KLK series. Information on other fuse series can be obtained from the Littelfuse Fuses listed in accordance with UL/CSA/ANCE 248 are required to have an interrupting rating of 10,000 amperes at 125V, with some exceptions (See STANDARDS section) which, in many applications, provides a safety factor far in excess of the short circuit currents available. NUISANCE OPENING: Nuisance opening is most often caused by an incomplete analysis of the circuit under consideration. Of all the Selection Factors listed in the FUSE SELECTION GUIDE, special attention must be given to items 1, 3, and 6, namely, normal operating current, ambient temperature, and pulses. For example, one prevalent cause of nuisance opening in conventional power supplies is the failure to adequately consider the fuse s nominal melting I 2 t rating. The fuse cannot be selected solely on the basis of normal operating current and ambient temperature. In this application, the fuse s nominal melting I 2 t rating must also meet the inrush current requirements created by the input capacitor of the power supply s smoothing filter. The procedure for converting various waveforms into I 2 t circuit demand is given in the FUSE SELECTION GUIDE. For trouble -free, long-life fuse protection, it is good design practice to select a fuse such that the I 2 t of the waveform is no more than 20% of the nominal melting I 2 t rating of the fuse. Refer to the section on PULSES in the FUSE SELECTION GUIDE. RESISTANCE: The resistance of a fuse is usually an insignificant part of the total circuit resistance. Since the resistance of fractional amperage fuses can be several ohms, this fact should be considered when using them in low-voltage circuits. Actual values can be obtained by contacting Littelfuse. Most fuses are manufactured from materials which have positive temperature coefficients, and, therefore, it is common to refer to cold resistance and hot resistance (voltage drop at rated current), with actual operation being somewhere in between. Cold resistance is the resistance obtained using a measuring current of no more than 10% of the fuse s nominal rated current. Values shown in this publication for cold resistance are nominal and representative. The factory should be consulted if this parameter is critical to the design analysis. Hot resistance is the resistance calculated from the stabilized voltage drop across the fuse, with current equal to the nominal rated current flowing through it. Resistance data on all Littelfuse products are available on request. Fuses can be supplied to specified controlled resistance tolerances at additional cost. 7 Revised: Jan 12, 2009

12 Introduction to Circuit Protection Transientology SOLDERING RECOMMENDATIONS: Since most fuse constructions incorporate soldered connections, caution should be used when installing those fuses intended to be soldered in place. The application of excessive heat can reflow the solder within the fuse and change its rating. Fuses are heat-sensitive components similar to semiconductors, and the use of heat sinks during soldering is often recommended. VOLTAGE RATING: The voltage rating, as marked on a fuse, indicates that the fuse can be relied upon to safely interrupt its rated short circuit current in a circuit where the voltage is equal to, or less than, its rated voltage. This system of voltage rating is covered by N.E.C. regulations and is a requirement of Underwriters Laboratories as a protection against fire risk. The standard voltage ratings used by fuse manufacturers for most smalldimension and midget fuses are 32, 63, 125, 250 and 600. In electronic equipment with relatively low output power supplies, with circuit impedance limiting short circuit currents to values of less than ten times the current rating of the fuse, it is common practice to specify fuses with 125 or 250 volt ratings for secondary circuit protection of 500 volts or higher. Lead-Free Soldering Parameters (most instances): Wave Solder 260ºC, 10 seconds max Reflow Solder 260ºC, 30 seconds max TEST SAMPLING PLAN: Because compliance with certain specifications requires destructive testing, these tests are selected on a statistical basis for each lot manufactured. TIME-CURRENT CURVE: The graphical presentation of the fusing characteristic, time-current curves are generally average curves which are presented as a design aid but are not generally considered part of the fuse specification. Time-current curves are extremely useful in defining a fuse, since fuses with the same current rating can be represented by considerably different time-current curves. The fuse specification typically will include a life requirement at % of rating and maximum opening times at overload points (usually 135% and 200% of rating depending on fuse standard characteristics). A time-current curve represents average data for the design; how ever, there may be some differences in the values for any one given production lot. Samples should be tested to verify performance, once the fuse has been selected. UNDERWRITERS LABORATORIES: Reference to Listed by Underwriters Laboratories signifies that the fuses meet the requirements of UL/CSA/ANCE Fuses for Supplementary Overcurrent Protection. Some 32 volt fuses (automotive) in this catalog are listed under UL Standard 275. Reference to Recognized under the Component Program of Underwriters Laboratories signifies that the item is recognized under the component program of Underwriters Laboratories and application approval is required. As mentioned previously (See RERATING), fuses are sensitive to changes in current, not voltage, maintaining their status quo at any voltage up to the maximum rating of the fuse. It is not until the fuse element melts and arcing occurs that the circuit voltage and available power become an issue. The safe interruption of the circuit, as it relates to circuit voltage and available power, is discussed in the section on INTERRUPTING RATING. To summarize, a fuse may be used at any voltage that is less than its voltage rating without detriment to its fusing characteristics. Please contact the factory for applications at voltages greater than the voltage rating. DERIVATION OF NOMINAL MELTING I 2 t: Laboratory tests are conducted on each fuse design to determine the amount of energy required to melt the fusing element. This energy is described as nominal melting I 2 t and is expressed as Ampere Squared Seconds (A 2 Sec.). A pulse of current is applied to the fuse, and a time measurement is taken for melting to occur. If melting does not occur within a short duration of about 8 milliseconds (0.008 seconds) or less, the level of pulse current is increased. This test procedure is repeated until melting of the fuse element is confined to within about 8 milliseconds. The purpose of this procedure is to assure that the heat created has insufficient time to thermally conduct away from the fuse element. That is, all of the heat energy (I 2 t) is used, to cause melting. Once the measurements of current (I) and time (t) are determined, it is a simple matter to calculate melting I 2 t. When the melting phase reaches completion, an electrical arc occurs immediately prior to the opening of the fuse element. Clearing I 2 t = Melting I 2 t + arcing I 2 t The nominal I 2 t values given in this publication pertain to the melting phase portion of the clearing or opening. Alternatively the time can be measured at 10 times of the rated current and the I 2 t value is calculated like above. 8 Revised: Jan 12, 2009

13 Fuse Selection Guide The application guidelines and product data in this guide are intended to provide technical information that will help with application design. Since these are only a few of the contributing parameters, application testing is strongly recommended and should be used to verify performance in the circuit/application. Many of the factors involved with fuse selection are listed below. For additional assistance with choosing fuses appropriate to you requirements, contact your Littelfuse products reprentative.: Selection Factors 1. Normal operating current 2. Application voltage (AC or DC) 3. Ambient temperature 4. Overload current and length of time in which the fuse must open 5. Maximum available fault current 6. Pulses, Surge Currents, Inrush Currents, Start-up Currents, and Circuit Transients 7. Physical size limitations, such as length, diameter, or height 8. Agency Approvals required, such as UL, CSA, VDE, METI, MITI or Military 9. Fuse features (mounting type/form factor, ease of removal, axial leads, visual indication, etc.) 10. Fuseholder features, if applicable and associated rerating (clips, mounting block, panel mount, PC board mount, R.F.I. shielded, etc.) 11. Application testing and verification prior to production 1. NORMAL OPERATING CURRENT: The current rating of a fuse is typically derated 25% for operation at 25ºC to avoid nuisance blowing. For example, a fuse with a current rating of 10A is not usually recommended for operation at more than 7.5A in a 25ºC ambient. For additional details, see RERATING in the previous section and AMBIENT TEMPERATURE below. 2. APPLICATION VOLTAGE: The voltage rating of the fuse must be equal to, or greater than, the available circuit voltage. For exceptions, see VOLTAGE RATING. 3. AMBIENT TEMPERATURE: The current carrying capacity tests of fuses are performed at 25ºC and will be affected by changes in ambient temperature. The higher the ambient temperature, the hotter the fuse will operate, and the shorter its life. Conversely, operating at a lower temperature will prolong fuse life. A fuse also runs hotter as the normal operating current approaches or exceeds the rating of the selected fuse. Practical experience indicates fuses at room temperature should last indefinitely, if operated at no more than 75% of catalog fuse rating. Ambient temperature effects are in addition to the normal re-rating, see example. Example: Given a normal operating current of 2.25 amperes in an application using a 229 series fuse at room temperature, then: Normal Operating Current Catalog Fuse = or Amperes = 3 Amp Fuse (at 25ºC) 0.75 This charts shows typical ambient temperature effects on current carrying capacity of Littelfuse products. For specific re-rating information, please consult the product data sheet ( or contact a Littelfuse representative. 9 Revised: Jan 12, 2009 Curve A: Thin-Film Fuses and 313 Series (.010 to.150a) Curve B: FLAT-PAK, TeleLink, Nano 2, PICO, Blade Terminal and other leaded and catridge fuses Curve C: Resettable PTC s

14 Introduction to Circuit Protection Transientology 4. OVERLOAD CURRENT CONDITION: The current level for which protection is required. Fault conditions may be specified, either in terms of current or, in terms of both current and maximum time the fault can be tolerated before damage occurs. Time-current curves should be consulted to try to match the fuse characteristic to the circuit needs, while keeping in mind that the curves are based on average data. 5. MAXIMUM FAULT CURRENT: The Interrupting of a fuse must meet or exceed the Maximum Fault Current of the circuit. 6. PULSES: The general term pulses is used in this context to describe the broad category of wave shapes referred to as surge currents, start-up currents, inrush currents, and transients. Electrical pulse conditions can vary considerably from one application to another. Different fuse constructions may not react the same to a given pulse condition. Electrical pulses produce thermal cycling and possible mechanical fatigue that could affect the life of the fuse. Initial or start-up pulses are normal for some applications and require the characteristic of a Slo-Blo fuse. Slo-Blo fuses incorporate a thermal delay design to enable them to survive normal start-up pulses and still provide protection against prolonged overloads. The startup pulse should be defined and then compared to the timecurrent curve and I 2 t rating for the fuse. Application testing is recommended to establish the ability of the fuse design to withstand the pulse conditions. Nominal melting I 2 t is a measure of the energy required to melt the fusing element and is expressed as Ampere Squared Seconds (A 2 Sec.). This nominal melting I 2 t, and the energy it represents (within a time duration of 8 milliseconds [0.008 second] or less and 1 millisecond [0.001 second]or less for thin film fuses), is a value that is constant for each different fusing element. Because every fuse type and rating, as well as its corresponding part number, has a different fusing element, it is necessary to determine the I 2 t for each. This I 2 t value is a parameter of the fuse itself and is controlled by the element material and the configuration of the fuse element. In addition to selecting fuses on the basis of Normal Operating Currents, Rerating, and Ambient Temperature as discussed earlier, it is also necessary to apply the I 2 t design approach. This nominal melting I 2 t is not only a constant value for each fuse element design, but it is also independent of temperature and voltage. Most often, the nominal melting I 2 t method of fuse selection is applied to those applications in which the fuse must sustain large current pulses of a short duration. These high-energy currents are common in many applications and are critical to the design analysis. The following example should assist in providing a better understanding of the application of I 2 t. EXAMPLE: Select a 125V, very fast-acting PICO II fuse that is capable of withstanding,000 pulses of current (I) of the pulse waveform shown in Figure 1. The normal operating current is 0.75 ampere at an ambient temperature of 25ºC. Step 1 Refer to Chart 1 and select the appropriate pulsewaveform, which is waveform (E) in this example. Place the applicable value for peak pulse current (i p ) and time (t) into the corresponding formula for waveshape (E), and calculate the result, as shown: 1 1 I 2 t= (i P ) = I 2 t = (i P ) 2 t x 8 2 x.004 = A 2 Sec. 5 This value is referred to as the Pulse I 2 t. Step 2 Determine the required value of Nominal Melting I 2 t by referring to Chart 2. A figure of 22% is shown in Chart II for,000 occurrences of the Pulse I 2 t calculated in Step 1. This Pulse I 2 t is converted to its required value of Nominal Melting I 2 t as follows: Nom. Melt I 2 t = Pulse I 2 t/ /.22 = A 2 Sec. Step 3 Examine the I 2 t rating data for the PICO II, 125V, very fast-acting fuse. The part number 251, 1 ampere design is rated at A 2 Sec., which is the minimum fuse rating that will accommodate the A 2 Sec. value calculated in Step 2. This 1 ampere fuse will also accommodate the specified 0.75 ampere normal operating current, when a 25% derating factor is applied to the 1 ampere rating, as previously described. 7. PHYSICAL SIZE LIMITATIONS: Please refer to the product dimensions presented in current Littelfuse product data sheets for specific information. 8. AGENCY APPROVALS: For background information about common standards, please consult the STANDARDS section of this guide or visit our Design Support web site ( For specific agency approval information for each Littelfuse product, please refer to the data sheets within this catalog and information presented on As agency approvals and standards may change, please rely on the information presented on as current information. 9. FUSE FEATURES: Please consult the specific product features presented within this catalog and on our web site ( For additional information and support contact your Littelfuse product representative. 10 Revised: Jan 12, 2009

15 FIGURE 1 CHART 1 WAVESHAPES FORMULAS A i p t i = k I 2 t = i p 2 t i b Current (Amperes) l t Pulse Energy Normal Operating Current B C D i p i p i p t t t i = i p -kt I 2 t = (1/3)(i p 2 + i p i b + i b2 ) t i = i p sin t I 2 t = (1/2) i p 2 t I 2 t = (1/3) i p 2 t Time (Seconds) 10. FUSEHOLDER FEATURES AND RERATING: For information about the range of Littelfuse fuseholders and specific features and characteristics, please consult with a Littelfuse products representative or visit our web site ( E F i p i p t OR t 1 t i = kt 2 OR i = i p (1-kt) 2 I 2 t = (1/5) i p 2 t i = i p e kt ) I 2 t (1/2) i p 2 t 1 For 25ºC ambient temperatures, it is recommended that fuseholders be operated at no more than 60% of the nominal current rating established using the controlled test conditions specified by Underwriters Laboratories. The primary objective of these UL test conditions is to specify common test standards necessary for the continued control of manufactured items intended for protection against fire, etc. A copper dummy fuse is inserted in the fuseholder by Underwriters Laboratories, and then the current is increased until a certain temperature rise occurs. The majority of the heat is produced by the contact resistance of the fuseholder clips. This value of current is considered to be the rated current of the fuseholder, expressed as % of rating. Some of the more common, everyday applications may differ from these UL test conditions as follows: fully enclosed fuseholders, high contact resistance,air movement, transient spikes, and changes in connecting cable size (diameter and length). Even small variations from the controlled test conditions can greatly affect the ratings of the fuse-holder. For this reason, it is recommended that fuseholders be derated by 40% (operated at no more than 60% of the nominal current rating established using the Underwriter Laboratories test conditions, as previously stated). CHART 2 PULSE CYCLE WITHSTAND CAPABILITY,000 Pulses Pulse I 2 t = 22% of Nominal Melting I 2 t 10,000 Pulses Pulse I 2 t = 29% of Nominal Melting I 2 t 1,000 Pulses Pulse I 2 t = 38% of Nominal Melting I 2 t Pulses Pulse I 2 t = 48% of Nominal Melting I 2 t Number of Pulses TESTING: The factors presented here should be considered in selecting a fuse for a given application. The next step is to verify the selection by requesting samples for testing in the actual circuit. Before evaluating the samples, make sure the fuse is properly mounted with good electrical connections, using adequately sized wires or traces. The testing should include life tests under normal conditions and overload tests Under fault conditions, to ensure that the fuse will operate properly in the circuit. 11 Revised: Jan 12, % % Pulse I 2 t / Average Melting I 2 t Note: Adequate time (10 seconds) must exist between pulse events to allow heat from the previous event to dissipate.

16 Introduction to Circuit Protection Transientology Standards Littelfuse is at your service to help solve your electrical protection problems. When contacting Littelfuse sales engineers, please have all the requirements of your applications available. Requests for quotes or assistance in designing or selecting special types of circuit protection components for your particular applications are also welcome. In the absence of special requirements, Littelfuse reserves the right to make appropriate changes in design, process, and manufacturing location without prior notice. Fuse ratings and other performance criteria are evaluated under laboratory conditions and acceptance criteria, as defined in one or more of the various fuse standards. It is important to understand these standards so that the fuse can be properly applied to circuit protection applications. UL/CSA/ANCE (Mexico) FUSES FOR SUPPLEMENTARY OVERCURRENT PROTECTION (600 Volts, Maximum) (Previously UL 198G and CSA C22.2, No. 59) UL LISTED A UL Listed fuse meets all the requirements of the UL/ CSA/ANCE Standard. Following are some of the requirements. UL ampere rating tests are conducted at %, 135%, and 200% of rated current. The fuse must carry % of its ampere rating and must stabilize at a temperature that does not exceed a 75ºC rise. The fuse must open at 135% of rated current within one hour. It also must open at 200% of rated current within 2 minutes for 0-30 ampere ratings and 4 minutes for ampere ratings. The interrupting rating of a UL Listed fuse is 10,000 amperes AC minimum at 125 volts. Fuses rated at 250 volts may be listed as interrupting 10,000 amperes at 125 volts and, at least, the minimum values shown below at 250 volts. Ampere of Interrupting Fuse In Amperes Voltage 0 to VAC 1.1 to VAC 3.6 to VAC 0.1 to VAC 15.1 to VAC Recognized Under the Component Program of Underwriters Laboratories The Recognized Components Program of UL is different from UL Listing. UL will test a fuse to a specification requested by the manufacturer. The test points can be different from the UL Listed requirements if the fuse has been designed for a specific application. Application approval is required by UL for fuses recognized under the Component Program. UL 275 AUTOMOTIVE GLASS TUBE FUSES (32 Volts) UL LISTED UL ampere ratings tests are conducted at 110%, 135%, and 200%. Interrupting rating tests are not required. CSA Certification CSA Certification in Canada is equivalent to UL Listing in the United States. The Component Acceptance Program of CSA is equivalent to the Recognition Program at UL. METI (Japan Ministry of Economy, Trade and Industry) PS E METI APPROVAL METI approval in Japan is similar to UL Recognition in the United States. METI B has its own design standard and characteristics. INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC) Publication 60127, Parts 1, 2, 3, 4, 6 The IEC organization is different from UL and CSA, since IEC only writes specifications and does not certify. UL and CSA write the specifications, and are responsible for testing and certification. Certification to IEC specifications are given by such organizations as SEMKO (Swedish Institute of Testing and Approvals of Electrical Equipment), BSI (British Standards Institute) and VDE (German Standard Insitute) D V E, as well as UL and CSA. IEC Publication defines three breaking capacity levels (interrupting rating). Low breaking capacity fuses must pass a test of 35 amperes or ten times rated current, whichever is greater, while enhanced breaking capacity fuses must pass a test of 150 amperes and high breaking capacity fuses must pass a test of 1500 amperes Part 2 Sheet 1 Type F Quick Acting, High Breaking Capacity Sheet 2 Type F Quick Acting, Low Breaking Capacity Sheet 3 Type T Time Lag, Low Breaking Capacity Sheet 4 Style Fuses 1/4 x 1 1/4 Sheet 5 Type T Time Lag, High Breaking Capacity Sheet 6 Type T Time Lag, Enhanced Breaking Capacity The letters F and T represent the time-current characteristic of the fast-acting and time delay fuses. One of these letters will be marked on the end cap of the fuse. 12 Revised: March 8, 2010

17 UL/CSA/ANCE (Mexico) vs. IEC Part 2 FUSE OPENING TIMES vs. METI/MITI Percent of UL & CSA IEC TYPE F STD Sheet 1 (*) IEC TYPE F Sheet 2 (*) IEC TYPE T Sheet 3 (*) IEC TYPE T Sheet 5 (*) 110 4Hr.Min. METI/MITI 130 1Hr.Min Minutes Max Minutes Min. 60 Minutes Min. 60 Minutes Min. 60 Minutes Min Hr.Max Minutes Max Minutes Max. 30 Minutes Max. 2 Minutes Max. 30 Minutes Max. 2 Minutes Max. (*) Note: The IEC Specification is written up to 10.0A. Any components above these ratings are not recognized by the IEC (although the fuses may have similar opening characteristics). IEC also has opening time requirements at 275%, 400% and 0%; however, the chart is used to show that fuses with the same ampere rating made to different specifications are not interchangeable. According to the IEC Standard, a one ampere-rated fuse can be operated at one ampere. A one ampere-rated fuse made to UL/CSA/ANCE should not be operated at more than.75 ampere (25% derated See RERATING section of FUSEOLOGY). METI B does not differentiate between fast acting and time delay characteristics. Publication IEC (Universal Modular Fuse-Links [UMF]) is greater. Parts rated at 125 volts must pass a test of 50 amperes or ten times rated current, whichever is greater. Parts rated at 250 volts are further defined as either low, intermediate or high breaking. The low breaking capacity fuses must pass a test of amperes rated current, while intermediate breaking capacity fuses must pass a test of 500 amperes and high breaking capacity fuses must pass a test of 1500 amperes. MILITARY/FEDERAL STANDARDS MIL-PRF and MIL-PRF These specifications govern the construction and performance of fuses suitable primarily for military electronic applications. MIL-PRF This specification governs the construction and performance of fuseholders suitable for military applications. DSSC Drawing #87108 This drawing governs the construction and performance of.177 x.570 (2AG size) cartridge fuses and axial lead versions suitable for military applications. DSSC #87108 designation is included in the fuse end cap marking. FEDERAL SPECIFICATION W-F-1814 This specification governs the construction and performance of fuses with high interrupting ratings that are approved for federal applications. Fuses approved to these specifications are on the Federal Qualified Products List. This part of IEC covers both PCB through-hole and surface mount fuses. This standard covers fuses rated 32, 63, 125, and 250 volts. This standard will be accepted by UL/CSA making it the first global fuse standard. This specification uses different fusing gates than IEC ; the gates used here are 125%, 200%, and 0%. The fuses must not open in less than one hour at 125% of rated current and open within two minutes at 200% of rated current. The 0% overload is used to determine the fuse characteristic. The opening time for each rating is listed below. Type FF : Less than sec. Type F : From sec. Type T : From sec. Type TT : From sec. These characteristics correlate to the terminology used in IEC Breaking capacity (interrupting rating) varies based on voltage rating. Parts rated at 32 & 63 volts must pass a test of 35 amperes or ten times rated current, whichever 13 Revised: March 8, 2010

18 Introduction to Circuit Protection Transientology Write to the following agencies for additional information on standards, approvals, or copies of the specifications. Underwriters Laboratories Inc. (UL) 333 Pfingsten Road Northbrook, Illinois, USA Canadian Standards Association (CSA) 5060 Spectrum Way, Suite Mississauga, Ontario, Canada L4W 5N6 International Electrotechnical Commission (IEC) 3, Rue de Varembe 1211 Geneva 20 Switzerland Naval Publications and Military StandardsForm Center (for Military and Federal Standards) 5801 Tabor Avenue Philadelphia, Pennsylvania, USA Defense Supply Center Columbus (DSCC) 3990 East Broad Street Columbus, Ohio, USA Ministry of Economy Trade and Industry (METI) Kasumigaseki Chiyouda-ku Tokyo -8901, Japan 14 Revised: Jan 12, 2009

19 Packaging and Part Numbering Littelfuse Fuse Products Traditional Part Numbering System Product Series Code Example: 437 series fuse is X X X X X X X X X X X X X X X Ampere Code Decimal is to far right for whole number amp ratings, to far left for ratings less than one, and within center for fractional amp ratings. Examples: 10A fuse is /4A or 0.25A fuse is /2A or 1.5A fuse is /4A or 1.25A fuse is 1.25 Refer to the Electrical Characteristics tables presented in each product data sheet for specific amp rating codes Packaging Quantity Code * A/X 1 V 5 T 10 S 20 L 50 H F 200 G 250 U 500 M 0 D 1500 P 2000 E 2500 W 3000 Y 4000 N 5000 K 00 J Z Misc. Packaging Type * A Ammo packed B Bubble packed C Chip packed R Reeled X Filler Options Codes * RT1 Reel and Tape, 2.062in (52.4mm) lead spacing RT2 Reel and Tape, 2.50 in (63.5mm) lead spacing RT3 Reel and Tape, in (73mm) lead spacing E Pigtail lead type fuse ID Indicating fuse L RoHS compliant P Lead-free * Not all options and codes listed here are available for all products. For information about the specific options available for any Littelfuse product, please refer to the packaging details information within each product data sheet or contact your Littelfuse products representative. Tape and Reel packaging per EIA-296: Tape width is defined as the width of the tape and reeled fuse (x) as measured from inside tape to inside tape. Pitch is defined as the space between two tape and reeled fuses (y) as measured from lead to lead. x y Littelfuse Wickmann Products Part Numbering System 15 Revised: Jan 12, 2009

20 Introduction to Circuit Protection Transientology 16 Revised: Jan 12, 2009

21 Surface Mount Fuses Ceramic Fuse > 437 Series 437 Series 1206 Fast-Acting Fuse Description This % Lead-free, RoHS compliant and Halogen-free fuse series has been designed specifically to provide over current protection to circuits that see high working ambient temperatures (up to 150ºC). The general design ensures excellent temperature stability and performance reliability. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E A ~ 8A LR A ~ 8A In addition to this, the high I²t values typical of the Littelfuse Ceramic Fuse family ensure high inrush current withstand capability. Features from -55ºC to +150ºC RoHS compliant and lead-free reflow / wave soldering 437 Series Applications Electrical Characteristics for Series % of Ampere Ampere Opening Time at 25ºC % 250mA - 8A 4 hours, Minimum 250% 750mA - 8A 5 seconds, Maximum 350% 250mA -500mA 5 seconds, Maximum 350% 750mA - 8A 1 second, Maximum Electrical Specifications by Item Ampere (A) Amp Code Max. Voltage (V) Interrupting Nominal Resistance (Ohms) 2 Nominal Melting I 2 t (A 2 Sec.) 3 Nominal Voltage Drop At Rated Current (V) 4 Nominal Power Dissipation At Rated Current (W) Agency Approvals 250mA x x V AC/DC 375mA x x 500mA x x 750mA x x 1A x x 1.25A V AC/DC x x 1.5A x x 1.75A x x 2A x x 2.5A x x 3A x x 3.5A x x 4A V AC/DC x x 5A x x 7A x x 8A x x Notes: 1. AC Interrupting tested at rated voltage with unity power factor. DC Interrupting tested at rated voltage with time constant < 0.8 msec. 2. Nominal Resistance measured with < 10% rated current. 3. Nominal Melting I²t measured at 1 msecs. opening time. 4. Nominal Voltage Drop measured at rated current after temperature has stabilized. Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See Temperature Rerating Curve for additional rerating information. Devices designed to be mounted with marking code facing up. Please refer to for current information. 17 Revised: August 3, Series

22 Temperature Introduction Surface to Circuit Mount Protection Fuses Ceramic Fuse Transientology > 437 Series Temperature Rerating Curve Average Time Current Curves A.375A.500A.750A 1A A A 2.5A 3A 3.5A 4A 5A 7A 8A PERCENT OF RATING TEMPERATURE ( C) TIME IN SECONDS Note: 1. Rerating depicted in this curve is in addition to the standard rerating of 20% for continuous operation Example: For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: I = (0.80)(0.85)I RAT = (0.68)I RAT CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) seconds Average Ramp-up Rate (Liquidus Temp (T L ) to peak) 3 C/second max. T L T S(max) T S(min) Preheat t L Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 6 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering 260 C, 10 seconds max. 437 Series 18 Please refer to for current information.

23 Surface Mount Fuses Ceramic Fuse > 437 Series Product Characteristics Materials Moisture Sensitivity Level Solderability Humidity Test ESD Immunity Resistance to Solder Heat Dimensions [0.039] Body: Advanced Ceramic Terminations: Ag / Ni / Sn (% Lead-free) Element Cover Coating: Lead-free Glass IPC/JEDEC J-STD-020C, Level 1 IPC/EIC/JEDEC J-STD-002B, Condition B MIL-STD-202, Method 103B, Conditions D IEC , 8kV Direct MIL-STD-202, Method 210F, Condition B ± [0.126 ± 0.007] N / -0.2 [ / ] / [ / ] 2 Moisture Resistance MIL-STD-202, Method 106G Thermal Shock MIL-STD-202, Method 107G, Condition B Mechanical Shock MIL-STD-202, Method 213B, Condition A Vibration MIL-STD-202, Method 201A Vibration, High Frequency MIL-STD-202, Method 204D, Condition D Dissolution of Metallization IPC/EIC/JEDEC J-STD-002B, Condition D Terminal Strength IEC Part Marking System Amp Code Marking Code.250 D.375 E.500 F.750 G 001. H 1.25 J 01.5 K 1.75 L 002. N 02.5 O 003. P 03.5 R 004. S 005. T 007. W 008. X 437 Series ± [0.020 ± 0.08] [0.039] [0.059] Part Numbering System W R [0.138] [0.071] SERIES AMP CODE PACKING CODE R = Reel Pack QUANTITY CODE W = 3000 pcs Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA (IEC 286, part 3) 3000 WR Please refer to for current information Series

24 Introduction to Circuit Protection Transientology 20

25 Surface Mount Fuses Ceramic Fuse > 438 Series 438 Series 0603 Fast-Acting Fuse Description The 438 Series is a % Lead-free, RoHS compliant and Halogen-free fuse series designed specifically to provide over-current protection to circuits that operate under high working ambient temperature up to 150ºC. The general design ensures excellent temperature stability and performance reliability. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E A 6A LR A 6A The high I²t values which is typical in the Littelfuse Ceramic Fuse family ensure high inrush current withstand capability. Features from -55ºC to +150ºC compliant and Halogenfree and lead-free reflow / wave soldering 438 Series Applications Electrical Characteristics for Series % of Ampere Ampere Opening Time at 25ºC % 0.250A 6A 4 Hours, Minimum 250% 0.250A 6A 5 Seconds, Maximum Electrical Specifications by Item Ampere (A) Amp Code Max. Voltage (V) Interrupting Nominal Resistance (Ohms) 2 Nominal Melting I 2 t (A 2 Sec.) 3 Nominal Voltage Drop At Rated Current (V) 4 Nominal Power Dissipation At Rated Current (W) Agency Approvals x x x x x x x x x x x x x x VDC x x x x x x x x x x x x x x VDC x x Notes: 1. AC Interrupting tested at rated voltage with unity power factor. DC Interrupting tested at rated voltage with time constant < 0.8 msec. 2. Nominal Resistance measured with < 10% rated current. 3. Nominal Melting I²t measured at 1 msec. opening time. 4. Nominal Voltage Drop measured at rated current after temperature has stabilized. Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See Temperature Rerating Curve for additional rerating information. Devices designed to be mounted with marking code facing up. Please refer to for current information. 21 Revised: August 21, Series

26 Temperature Introduction Surface to Circuit Mount Protection Fuses Ceramic Fuse Transientology > 438 Series Temperature Rerating Curve Average Time Current Curves A.375A.500A.750A 1A 1.25A 1.5A 1.75A 2A 3A 2.5A 3.5A 4A 5A 6A PERCENT OF RATING TEMPERATURE ( C) TIME IN SECONDS Note: 1. Rerating depicted in this curve is in addition to the standard rerating of 20% for continuous operation. Example: For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: I = (0.80)(0.85)I RAT = (0.68)I RAT CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) seconds Average Ramp-up Rate (Liquidus Temp (T L ) to peak) 3 C/second max. T L T S(max) T S(min) Preheat t L Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 6 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering 260 C, 10 seconds max. 438 Series 22 Please refer to for current information.

27 Surface Mount Fuses Ceramic Fuse > 438 Series Product Characteristics Materials Moisture Sensitivity Level Solderability Humidity ESD Immunity Resistance to Solder Heat Dimensions / [ / ] 0.85 ± [0.033 ± 0.006] ± [0.020 ± 0.003] / [ / ] Body: Advanced Ceramic Terminations: Ag / Ni / Sn (% Lead-free) Element Cover Coating: Lead-free Glass IPC/JEDEC J-STD-020C, Level 1 IPC/EIC/JEDEC J-STD-002B, Condition B MIL-STD-202, Method 103B, Conditions D IEC , 8kV Direct MIL-STD-202, Method 210F, Condition B 1.54 ± [0.061 ± 0.006] Moisture Resistance MIL-STD-202, Method 106G Thermal Shock MIL-STD-202, Method 107G, Condition B-3 Mechanical Shock MIL-STD-202, Method 213B, Condition A Vibration MIL-STD-202, Method 201A Vibration, High Frequency MIL-STD-202, Method 204D, Condition D Dissolution of Metallization IPC/EIC/JEDEC J-STD-002B, Condition D Terminal Strength IEC Part Marking System Amp Code Marking Code.250 D.375 E.500 F.750 G 001. H 1.25 J 01.5 K 1.75 L 002. N 02.5 O 003. P 03.5 R 004. S 005. T 006. U 438 Series 0.60 [0.024] 1.00 [0.039] 1.94 [0.076] 0.74 [0.029] Part Numbering System W R SERIES AMP CODE PACKING CODE R = Reel Pack QUANTITY CODE W = 3000 pcs Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA (IEC 286, part 3) 3000 WR Please refer to for current information Series

28 Introduction to Circuit Protection Transientology 24

29 Surface Mount Fuses Ceramic Fuse > 501 Series 501 Series High Current 1206 Fast-Acting Fuse Description The 501 Series is a % Lead-free, RoHS compliant and Halogen-free fuse series designed specifically to provide over- current protection to circuits that operate under high working ambient temperature up to 150 C. The general design ensures excellent temperature stability and performance reliability. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E A - 20A LR A - 20A The high I 2 t values which is typical in the Littelfuse Ceramic Fuse family, ensure high inrush current withstand capability. Features from -55ºC to +150ºC over-current protection in high current voltage regulator module (VRM) applications compliant and Halogenfree and lead-free reflow / wave soldering 501 Series Electrical Characteristics for Series % of Ampere Ampere Opening Time at 25ºC % 10A 20A 4 Hours, Minimum 350% 10A 20A 5 Seconds, Maximum Applications Module (VRM) Equipment Electrical Specifications by Item Ampere (A) Amp Code Max. Voltage (V) Interrupting (DC) 1 Nominal Resistance (Ohms) 2 Nominal Melting I 2 T (A 2 Sec.) 3 Nominal Voltage Drop At Rated Current (V) 4 Nominal Power Dissipation At Rated Current (W) Agency Approvals x x x x VDC x x x x Notes: 1. DC Interrupting tested at rated voltage with time constant < 0.8 msec. 2. Nominal Resistance measured with < 10% rated current. 3. Nominal Melting I 2 t measured at 1 msec. opening time. For other I 2 t data refer to chart. 4. Nominal Voltage Drop measured at rated current after temperature has stabilized and with fuse mounted on board with 3-oz Cu trace. Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See Temperature Rerating Curve for additional rerating information. Devices designed to be mounted with marking code facing up. Please refer to for current information. 25 Revised: January 21, Series

30 Temperature Introduction Surface to Circuit Mount Protection Fuses Ceramic Fuse Transientology > 501 Series Temperature Rerating Curve Average Time Current Curves 140 PERCENT OF RATING TEMPERATURE ( C) Note: 1. Rerating depicted in this curve is in addition to the standard rerating of 20% for continuous operation. Example: For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: I = (0.80)(0.85)I RAT = (0.68)I RAT Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) seconds T L T S(max) t L Average Ramp-up Rate (Liquidus Temp (T L ) to peak) 3 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 6 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering 260 C, 10 seconds max. 501 Series 26 Please refer to for current information.

31 Surface Mount Fuses Ceramic Fuse > 501 Series Product Characteristics Materials Moisture Sensitivity Level Solderability Humidity Test ESD Immunity Resistance to Solvents Dimensions Body: Advanced Ceramic Terminations: Ag / Ni / Sn (% Lead-free) Element Cover Coating: Lead-free Glass IPC/JEDEC J-STD-020C, Level 1 IPC/ECA/JEDEC J-STD-002C, Condition B MIL-STD-202, Method 103B, Conditions D IEC , 8kV Direct MIL-STD-202, Method 210F, Condition B ±.1778 [.126 ±.007] [0.03] /-.20 [ /-.008] Moisture Resistance MIL-STD-202, Method 106G Thermal Shock MIL-STD-202, Method 107G, Condition B Mechanical Shock MIL-STD-202, Method 213B, Condition A Vibration MIL-STD-202, Method 201A Vibration, High Frequency MIL-STD-202, Method 204D, Condition D Dissolution of Metallization IPC/ECA/JEDEC J-STD-002C, Condition D Terminal Strength IEC Part Marking System Amp Code Marking Code Series /-.076 [ /-.003] Thin Version.502 ±.08 [.02 ±.003] Part Numbering System Series W R T TERMINATION AMP Code Quantity W = 3000 pcs [.039] [.059] [.071].520 ±.200 [.020 ±.008] Packing Code R = Reel Pack Thickness Code T = Thin Version [.138] Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA (IEC 286, part 3) 3000 WR Please refer to for current information Series

32 Introduction to Circuit Protection Transientology 28

33 Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 466 Series 466 Series Fuse Description The 466 Series Fast-Acting Surface Mount Fuse (SMF) is a small (1206 size) thin-film device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is % lead-free and meets the requirements of the RoHS directive. New Halogen-Free 466 Series fuses are available to order using the HF suffix. See Part Numbering section for additional information. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 LR29862 Electrical Characteristics for Series % of Ampere Opening Time at 25 O C 125mA - 5A 125mA - 5A Features % 4 hours, Minimum 200% 5 sec., Maximum 300% 0.2 sec., Maximum Applications with lead-free solders and higher temperature profiles top surface with code to allow amperage rating identification without testing sensitive applications and-place operations is resistant to industry standard cleaning operations electrical performance are identical to Littelfuse 429 and 433 Series products construction provides superior inrush withstand characteristics (I 2 t) over ceramic or glass-based 1206 chip fuse products Secondary protection for space constrained applications: 466 Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nom Voltage Drop (mv) Nom Power Dissipation (W) Agency Approvals x x V AC/ x x DC x x x x x x x x x x V AC/DC x x x x x x x x x x x x V AC/DC x x x x 1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage. Please refer to for current information. 29 Revised: July 7, Series

34 Temperature Introduction Surface to Circuit Mount Protection Fuses Thin Film > 1206 Size > Very Fast-Acting Transientology > 466 Series Temperature Rerating Curve Average Time Current Curves 1/8A 1/4A 3/8A 1/2A 3/4A 1A 1 1/4A 1 1/2A 1 3/4A 2A 2 1/2A 3A 4A 5A 10 TIME IN SECONDS Note: 1. Rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation. Example: For continuous operation at 70 degrees celsius, the fuse should be rerated as follows: I = (0.75)(0.80)I RAT = (0.60)I RAT CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) seconds T L T S(max) t L Average Ramp-up Rate (Liquidus Temp (T L ) to peak) 5 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering 260 C, 10 seconds max. 466 Series 30 Please refer to for current information.

35 Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 466 Series Product Characteristics Materials Operating Temperature Thermal Shock Humidity Body: Advanced High Temperature Substrate Terminations: % Tin over Nickel over Copper Element Cover Coat: Conformal Coating 55 O C to 90 O C. Consult temperature rerating curve chart. Withstands 5 cycles of 55 O C to 125 O C MIL-STD-202F, Method 103B, Condition D Vibration Insulation Resistance (After Opening) Resistance to Soldering Heat Part Marking System Per MIL-STD-202F, Method 201A Greater than 10,000 ohms MIL-STD-202G, Method 210F, Condition D Dimensions MARKING CODE VARIES WITH AMPERAGE RATING (SEE CHART) ± (0.125" ± 0.005") Cu Sn Sn Sn ± (0.022" ± 0.005") ± (0.026" ± 0.005") Coating ± (0.023" ± 0.003") Amp Code Marking Code.125 B.200 C.250 D.375 E.500 F.750 G 001. H 1.25 J 466 Series ± (0.060" ± 0.005") 01.5 K 1.75 L 1.65 (.065") 1.52 (.060") ± (0.125" ± 0.005") 4.83 (.190") 3.81 (.150") 1.52 (.060") 1.14 (.045") 002. N 02.5 O 003. P 004. S 005. T 2.03 (.080") WAVE SOLDER 2.03 (.080") REFLOW SOLDER Part Numbering System NRHF SERIES AMP Code Refer to Amp Code column in the Electrical Specifications table. The dot is poisitioned before the Packaging Suffix with whole ratings and within the numbering sequence for fractional ratings. QUANTITY Code N = 5000 pcs PACKAGING Code R = Tape and Reel HF SUFFIX HALOGEN FREE ITEM Example:.125 amp product is NR HF (2 amp product shown above). Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA RS (IEC 286, part 3) 5000 NR Please refer to for current information Series

36 Introduction to Circuit Protection Transientology 32

37 Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series 429 Series Fuse Description The 429 Series Fast-Acting SMF is a small (1206 size) thinfilm device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is Halogen-Free, Lead-Free and meets the requirements of the RoHS directive. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E A LR A Features Lead-Free 7A device available-add L suffix to part number. device available-add HF suffix to the part number For new designs up to 5A please consult the 433 or 466 Series 429 Series Electrical Characteristics for Series % of Ampere Opening Time at 25 O C % 4 hours, Minimum 200% 5 sec., Maximum 300% 0.2 sec., Maximum Applications Secondary protection for space constrained applications such as: Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting 35 voltage, VAC/VDC Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x 1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage. Please refer to for current information. 33 Revised: Jan 12, Series

38 Temperature Introduction Surface to Circuit Mount Protection Fuses Thin Film > 1206 Size > Very Fast-Acting Transientology > 429 Series Temperature Rerating Curve Average Time Current Curves 7A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation Example: For continuous operation at 70 degrees celsius, the fuse should be deratedas follows: I = (0.75)(0.80)I RAT = (0.60)I RAT CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max Time 25 C to peak Temperature (T P ) 8 minutes Max. Do not exceed 260 C Wave Soldering 260 C, 10 seconds max. 429 Series 34 Please refer to for current information.

39 Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series Product Characteristics Materials Operating Temperature Body: Epoxy Substrate Terminations, RoHS Compliant Device (429L): % Tin over Nickel over Copper Element Cover Coat: Conformal Coating NOTE: Do not use alcohol-based cleaners or solvents with 429 Series Thin-Film Fuses as it may damage the coating. 55 O C to 90 O C. Consult temperature rerating chart. For operation above 90 C contact Littelfuse. Humidity Vibration Insulation Resistance (After Opening) Resistance to Soldering Heat MIL-STD-202F, Method 103B Condition D Withstands Hz per MIL-STD- 202F, Method 201A and Hz at 20 G s per MIL-STD-202F, Method 204D, Condition D. Greater than 10,000 ohms MIL-STD-202G, Method 210F, Condition D Thermal Shock Withstands 5 cycles of 55 O C to 125 O C Dimensions RECOMMENDED PAD LAYOUTS 3.81 (.150") 2.03 (.080") REFLOW SOLDER 1.52 (.060") 1.14 (.045") 1.12 (.044") REF (.125") 2.49 (.098") REF (.060") 1.14 (.045").635 (.025") Part Marking System Series Marking Code 429L 7 Part Numbering System SERIES AMP Code Refer to Amp Code Column of Electrical characteristics table QUANTITY Code WRM = 3000 pieces, Tape and Reel L = Lead-Free device and RoHS compliant device Halogen-Free item WRM L HF 429 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Tape & Reel 8mm tape EIA RS (IEC 286, part 3) 3000 WRM Please refer to for current information Series

40 Introduction to Circuit Protection Transientology 36

41 Surface Mount Fuses Thin Film > 1206 Size > Slo-Blo > 468 Series 468 Series Fuse Description The 468 Series Time-Lag (Slo-Blo ) SMF is a small (1206 size) thin-film device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is % lead-free and meets the requirements of the RoHS directive. New Halogen-Free 468 Series fuses are available to order use the HF suffix. See Part Numbering section for additional information. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 LR29862 Electrical Characteristics for Series % of Ampere 500MA - 3A 500MA - 3A Opening Time at 25 O C % 4 hours, Minimum 200% 1 sec., Min.; 120 sec., Max. 300% 0.05 sec., Min.; 1.5 sec., Max 800% sec., Min.;.05 sec., Max. Features electronic industry environmental standards for lead reduction. with lead-free solders and higher temperature profiles. withstands high inrush currents and prevents nuisance openings. Applications distinct from fastacting version for easy identification. visual verification of amperage rating. Secondary protection for space constrained applications: 468 Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nom Voltage Drop (mv) Nom Power Dissipation (W) Agency Approvals x x VAC/VDC x x x x VAC x x VDC x x VAC/VDC x x 1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage. Please refer to for current information. 37 Revised: Jan 12, Series

42 Temperature Introduction Surface to Circuit Mount Protection Fuses Thin Film > 1206 Size > Slo-Blo Transientology > 468 Series Temperature Rerating Curve Average Time Current Curves.5A 1A 1.5A 2A 2.5A 3A 10 Time in Seconds Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation Example: For continuous operation at 70 degrees celsius, the fuse should be deratedas follows: I = (0.75)(0.80)I RAT = (0.60)I RAT Current in Amperes Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max Time 25 C to peak Temperature (T P ) 8 minutes Max. Do not exceed 260 C Wave Soldering 260 C, 10 seconds max. 468 Series 38 Please refer to for current information.

43 Surface Mount Fuses Thin Film > 1206 Size > Slo-Blo > 468 Series Product Characteristics Materials Operating Temperature Thermal Shock Body: Epoxy Substrate Terminations: % Tin Element Cover Coat: Conformal Coating 55 O C to 90 O C. Consult temperature rerating curve chart. For operation above 90 C please contact Littelfuse Withstands 5 cycles of 50 O C to 125 O C Vibration Insulation Resistance (After Opening) Resistance to Soldering Heat Withstands Hz per MIL-STD-202F, Method 201A and Hz at 20 G s per MIL-STD-202F, Method 204D, Condition D Greater than 10,000 ohms. MIL-STD-202G, Method 210F, Condition D Humidity MIL-STD-202F, Method 103B, Condition D Dimensions MARKING CODE VARIES WITH AMPERAGE RATING (SEE CHART) 1.27 (.050").66 (.026") Coating.58 (.023") Part Marking System Amp Code Marking Code.500 TF 001. TH 01.5 TK 002. TN 468 Series 02.5 TO 1.52 (.060") 003. TP 1.65 (.065") 1.52 (.060") 3.18 (.125") 4.83 (.190") 2.03 (.080") WAVE SOLDER 3.81 (.150") 1.52 (.060") 1.14 (.045") 2.03 (.080") INFARED SOLDER Part Numbering System SERIES NRHF AMP Code The dot is poisitioned before the Packaging Suffix with whole ratings and within the numbering sequence for fractional ratings. Refer to Amp Code column in the Electrical Specifications table. PACKAGING Code NR = Tape and Reel, 5000 pcs HF SUFFIX HALOGEN FREE ITEM Example: 1.5 amp product is NRHF (2 amp product shown above). Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Tape & Reel 8mm tape EIA RS (IEC 286, part 3) 5000 NR Please refer to for current information Series

44 Introduction to Circuit Protection Transientology 40

45 Surface Mount Fuses Thin Film > 0603 Size > Very Fast-Acting > 467 Series 467 Series Fuse Description The 467 Series Fast-Acting SMF is an ultra small (0603 size) thin-film device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is % lead-free and meets the requirements of the RoHS directive. New Halogen-Free 467 Series fuses are available to order use the HF suffix. See Part Numbering section for additional information.. Features free solders and higher Agency Approvals temperature profiles. AGENCY AGENCY FILE NUMBER AMPERE RANGE materials provide E MA - 5A improved performance in elevated ambient temperature applications. LR MA - 5A Electrical Characteristics for Series with code to allow amp rating identification without testing. % of Ampere Opening Time at 25 C sensitive applications. % 4 hours, Minimum and-place operations. 200% 5 sec., Maximum 300% 0.2 sec., Maximum Applications material is resistant to industry standard cleaning operations. electrical performance is identical to Littelfuse 431 and 434 Series products. construction provides superior inrush withstand characteristics (I2t) over ceramic or glass based 0603 fuse products. Secondary protection for space constrained applications: drives. 467 Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting 1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage. Please refer to for current information. Nominal Cold Resistance (Ohms) 41 Revised: Jan 12, 2009 Nominal Melting I 2 t (A 2 sec) Nom Voltage Drop (mv) Nom Power Dissipation (W) Agency Approvals x x x x AC/DC x x x x x x x x x x x x x x AC/DC x x x x x x x x x x 467 Series

46 Temperature Introduction Surface to Circuit Mount Protection Fuses Thin Film > 0603 Size > Very Fast-Acting Transientology > 467 Series Temperature Rerating Curve Average Time Current Curves A A A A 1.00 A 1.25 A 1.50 A 1.75 A 2.00 A 2.50 A 3.00 A 3.50 A 4.00 A 5.00 A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. Example: For continuous operation at 70 degrees celsius, the fuse should be deratedas follows: I = (0.75)(0.80)I RAT = (0.60)I RAT CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak T S(max) to T L - Ramp-up Rate 5 C/second max 5 C/second max T S(min) Preheat t S Ramp-down - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max Time 25 C to peak Temperature (T P ) 8 minutes Max. Do not exceed 260 C Wave Soldering 260 C, 10 seconds max. 467 Series 42 Please refer to for current information.

47 Surface Mount Fuses Thin Film > 0603 Size > Very Fast-Acting > 467 Series Product Characteristics Materials Operating Temperature Humidity Body: Advanced High Temperature Substrate Terminations: % Tin over Nickel over Copper Element Cover Coat: Conformal Coating 55 O C to 90 O C. Consult temperature rerating curve chart. For operation above 90 C contact Littelfuse. MIL-STD-202F, Method 103B, Condition D Thermal Shock Vibration Insulation Resistance (After Opening) Resistance to Soldering Heat Withstands 5 cycles of 55 O C to 125 O C Per MIL-STD-202F Greater than 10,000 ohms. MIL-STD-202G, Method 210F, Condition D Dimensions Part Marking System Sn.813 (.032") Cu 1.60 (.063").127 (.005") Sn MARKING CODE VARIES WITH AMPERAGE RATING (SEE CHART).18 R (.007") REF..279 (.011").305 (.012") Coating Amp Code Marking Code.250 D.375 E.500 F.750 G 001. H 1.25 J 01.5 K 467 Series 1.09 (.043") Sn 1.75 L 002. N 1.02 (.040") 3.20 (.126") 2.54 (.") 1.02 (.040").762 (.030") 02.5 O 003. P 03.5 R 1.09 (.043") WAVE SOLDER 1.09 (.043") REFLOW SOLDER 004. S 005. T Part Numbering System NRHF SERIES AMP Code The dot is poisitioned before the Packaging Suffix with whole ratings and within the numbering sequence for fractional ratings. Refer to Amp Code column in the Electrical Specifications table. PACKAGING Code NR = Tape and Reel, 5000 pcs HF SUFFIX HALOGEN FREE ITEM Example: 1.5 amp product is NRHF (2 amp product shown above). Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA RS (IEC 286, part 3) 5000 NR Please refer to for current information Series

48 Introduction to Circuit Protection Transientology 44

49 Surface Mount Fuses Thin Film > 0402 Size > Very Fast-Acting > 435 Series 435 Series Fuse Description The 435 Series are fast-acting surface mount thin-film fuses. Their ultra-small size (0402 size) makes them ideal for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is % lead-free and meet the requirements of the RoHS directive. New Halogen-Free 435 Series fuses are available to order use the HF suffix. See Part Numbering section for additional information. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE Electrical Characteristics for Series % of Ampere E A LR A Ampere Opening Time at 25 O C % 0.250A - 5A 4 hours, Minimum 200% 0.375A - 5A 5 secs., Maximum 300% 0.250A 5 secs., Maximum 300% 0.375A - 5A 0.2 sec., Maximum Features 32VDC ratings of 0.25 to 5.0 amperes free and halogen-free Applications of sensitive circuits as fuses are designed to open consistently in <5sec at 200% overload. Capacity, High l 2 t Secondary protection for space constrained applications such as: 435 Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nom Voltage Drop (mv) Nom Power Dissipation (W) Agency Approvals x x x x x x x x x x x x x x DC x x x x x x x x x x x x x x 1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage. Please refer to for current information. 45 Revised: February 5, Series

50 Temperature Introduction Surface to Circuit Mount Protection Fuses Thin Film > 0402 Size > Very Fast-Acting Transientology > 435 Series Temperature Rerating Curve Average Time Current Curves.25A.375A.5A.75A 1A 1.25A 1.5A 1.75A 2A 2.5A 3A 3.5A 4A 5A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. Example: For continuous operation at 70 degrees celsius, the fuse should be deratedas follows: I = (0.75)(0.80)I RAT = (0.60)I RAT CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max Time 25 C to peak Temperature (T P ) 8 minutes Max. Do not exceed 260 C Wave Soldering 260 C, 10 seconds max. 435 Series 46 Please refer to for current information.

51 Surface Mount Fuses Thin Film > 0402 Size > Very Fast-Acting > 435 Series Product Characteristics Materials Terminal Strength Insulation Resistance Body: Epoxy / Glass Substrate; Parts with HF suffix: Halogen Free Epoxy / Glass Terminations: % Tin over Nickel over Copper Device Weight: 0.316mg MIL-STD-202F, Method 211A, Test Condition A After Opening: Greater than 10,000Ohms Operating Temperature 55 C to 90 C. Consult temperature rerating curve chart. For operation above 90 C please contact Littelfuse. Thermal Shock Withstands 5 cycles of 55 C to 125 C Vibration MIL-STD-202F Dimensions Part Marking System A.991 +/-.051 (.039" +/-.002") Marking code varies with amperage. Refer to Part Marking System chart. B.508 +/-.051 (.020" +/-.002") Amp Code Marking Code 435 Series D / (.0085" +/-.0035") Sn Cu.229 +/-.102 (.009" +/-.004") C.305 +/-.076 (.012" +/-.003") Reflow solder recommended mounting pad dimensions.584 (.023").381 (.015") 1.55 (.061") (.022") A B C D inch min inch max mm min mm max Part Numbering System K R HF SERIES AMP Code Refer to Amp Code column in the Electrical Specifications table. The dot is positioned at the end of the number sequence with whole ratings and within for fractional ratings. Example: 1.5 amp product is KRHF (2 amp product shown) QUANTITY Code K = 10,000 Pieces PACKAGING Code R = Tape and Reel HALOGEN FREE ITEM Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA RS (IEC 286, part 3) 00 KR Please refer to for current information Series

52 Introduction to Circuit Protection Transientology 48

53 Surface Mount Fuses NANO 2 > Very Fast-Acting > 448 Series 448 Series Fuse PS E Description The lead-free Nano 2 SMF Fuse is a very small, square surface mount fuse that is RoHS compliant and % leadfree. This product is fully compatible with lead-free solder alloys and higher temperature profiles associated with lead-free assembly. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E mA - 15A rating available (62mA to 15A) temperature range de-rating 448 Series LR mA - 15A PS E NBK A - 10A Applications Electrical Characteristics for Series % of Ampere Ampere Opening Time % 1/ hours, Minimum 200% 1/ sec., Maximum sec., Maximum equipment protection Please refer to for current information. 49 Revised: Jan 12, Series

54 Introduction Surface to Circuit Mount Protection Fuses NANO 2 > Very Fast-Acting Transientology > 448 Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x 50 amperes VAC/VDC x x amperes x x VDC x x x PSE: amperes x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x PS E VAC 50 VDC 300 VDC PSE: x x x amperes x x VAC/VDC 300 VDC x x Notes: - l 2 t calculated at 8ms. - Resistance is measured at 10% of rated current, 25ºC 448 Series 50 Please refer to for current information.

55 Temperature Surface Mount Fuses NANO 2 > Very Fast-Acting > 448 Series Temperature Rerating Curve Average Time Current Curves.062 A.080 A. A.125 A.160 A.200 A.250 A.315 A.375 A.40 A.50 A.63 A.75 A.80 A 1.00 A 1.25 A 1.50 A 1.60 A 2.00 A 2.50 A 3.00 A 3.15 A 3.50 A 4.00 A 5.00 A 6.30 A 7 A 8 A 10 A 12 A 15 A 10 TIME IN SECONDS Series Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPS Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering Parameters 260 C Peak Temperature, 10 seconds max. Please refer to for current information Series

56 Introduction Surface to Circuit Mount Protection Fuses NANO 2 > Very Fast-Acting Transientology > 448 Series Product Characteristics Materials Product Marking Body: Ceramic Terminations: Gold-plated Caps Brand, Amperage Operating Temperature -55 o C to 125 o C Moisture Sensitivity Level Level 1, J-STD-020C Solderability MIL-STD-202, Method 208 Insulation Resistance (after Opening) MIL-STD-202, Method 302, Test Condition A (10,000 ohms minimum) Thermal Shock Mechanical Shock Vibration Moisture Resistance Salt Spray Resistance to Soldering Heat MIL-STD-202, Method 107, Test Condition B, 5 cycles, -65 o C to 125 o C, 15 each extreme MIL-STD-202, Method 213, Test I: Deenergized. G s pk amplitude, sawtooth wave 6ms duration, 3 cycles XYZ+xyz = 18 shocks MIL-STD-202, Method 201: 0.03 amplitude, Hz in 1 min. 2hrs each XYZ=6hrs MIL-STD-202, Method 106, 10 cycles MIL-STD-202, Method 101, Test Condition B (48hrs) MIL-STD-202, Method 210, Test condition B (10 sec at 260 o C) Dimensions Part Numbering System 6.10 (.240") 2.69 (.106") M R 1.45 (.057") 1.96 (.077") F 7 A 6.86 (.270") 3.15 (.124") 2.95 (.116") Recommended pad layout 2.69 (.106") SERIES AMP Code * Refer to Electrical Characteristics table QUANTITY Code M = 0 pcs PACKAGING Code R = Tape and Reel *Example: 1.5 amp product is MR (1 amp product shown above). Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 12mm Tape and Reel EIA RS (IEC 286, part 3) 0 MR 448 Series 52 Please refer to for current information.

57 Surface Mount Fuses NANO 2 > Slo-Blo > 449 Series 449 Series Fuse PS E Description Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E mA - 5A The lead free NANO 2 Slo-Blo fuse is RoHS compliant and % lead-free. This product is fully compatible with lead-free solder alloys and higher temperature profiles associated with lead-free assembly. The Slo-Blo design has enhanced inrush withstand characteristics over the NANO 2 Fast-Acting Fuse. The unique time delay feature of this fuse design helps solve the problem of nuisance opening by accommodating inrush currents that normally cause a fast-acting fuse to open. Features ratings available temperature range de-rating 449 Series PS E NBK A - 5A Electrical Characteristics for Series % of Ampere Opening Time % 4 hours, Minimum 200% 1 sec., Min.; 60 sec., Max. 300% 0.2 sec., Min.; 3 sec., Max 800% 0.02 sec., Min.; 0.1 sec., Max. Applications Secondary protection for space constrained applications: equipment protection Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x VAC/ VDC x x x x PSE: VAC x x x x x x x x x x Notes: - l 2 t calculated at 8ms. Resistance is measured at 10% of rated current, 25ºC PS E Please refer to for current information. 53 Revised: Jan 12, Series

58 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 > Slo-Blo Transientology > 449 Series Temperature Rerating Curve Average Time Current Curves 0.375A.500A.750A 1A 1.5A 2A 2.5A 3A 3.5A 4A 5A TIME IN SECONDS 10 1 Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 3 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 3 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering Parameters 260 C Peak Temperature, 3 seconds max. 449 Series 54 Please refer to for current information.

59 Surface Mount Fuses NANO 2 > Slo-Blo > 449 Series Product Characteristics Materials Product Marking Body: Ceramic Terminations: Gold-plated Caps Brand, Amperage Operating Temperature -55 C to 125 C Moisture Sensitivity Level Level 1, J-STD-020C Solderability MIL-STD-202, Method 208 Insulation Resistance (after Opening) Dimensions MIL-STD-202, Method 302, Test Condition A (10,000 ohms minimum) Thermal Shock Mechanical Shock Vibration Moisture Resistance Salt Spray Resistance to Soldering Heat Part Numbering System MIL-STD-202, Method 107, Test Condition B, 5 cycles, -65 C to 125 C, 15 each extreme MIL-STD-202, Method 213, Test I: Deenergized. G s pk amplitude, sawtooth wave 6ms duration, 3 cycles XYZ+xyz = 18 shocks MIL-STD-202, Method 201: 0.03" amplitude, Hz in 1 min. 2hrs each XYZ=6hrs MIL-STD-202, Method 106, 10 cycles MIL-STD-202, Method 101, Test Condition B (48hrs) MIL-STD-202, Method 210, Test condition B (10 sec at 260 C) 449 Series 6.86 (.270") 6.10 (.240") M R 1.96 (.077") 3.15 (.124") 2.95 (.116") Recommended pad layout 1.45 (.057") T 1 A F 2.69 (.106") 2.69 (.106") SERIES AMP Code* Refer to Electrical characteristics table QUANTITY Code M = 0 pcs PACKAGING Code R = Tape and Reel *Example: Amp product is MR (1 amp product shown above). Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 12mm Tape and Reel EIA RS (IEC 286, part 3) 0 MR Please refer to for current information Series

60 Introduction to Circuit Protection Transientology 56

61 Surface Mount Fuses NANO 2 > Very Fast-Acting > 451/453 Series 451/453 Series Fuse PS E Description The Nano 2 SMF Fuse is a very small, Wire-in-Air (WIA) square shape surface mount fuse which is very suitable for the secondary side circuit over-current protection applications and is designed for PCB using surface mount technology. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E A - 15A rating available (62mA to 15A) temperature range de-rating 451/453 Series LR mA - 15A Applications PS E NBK E10480B NBK E E A - 5A 6.3A - 10A 62mA - 5A Electrical Characteristics for Series % of Ampere Ampere Opening Time % 1/ hours, Minimum 200% 1/ sec., Maximum sec., Maximum equipment protection Please refer to or /453.html for current information. 57 Revised: February 5, /453 Series

62 Introduction Surface to Circuit Mount Protection Fuses NANO 2 > Very Fast-Acting > 451/453 Transientology Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x x x x x PSE: amperes x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x PS E VAC/ 50 VDC 300 VDC PSE: x x x VAC/VDC x x VDC x x Notes: - l 2 t calculated at 8ms. - Resistance is measured at 10% of rated current, 25ºC 451/453 Series 58 Please refer to or /453.html for current information.

63 Temperature Surface Mount Fuses NANO 2 > Very Fast-Acting > 451/453 Series Temperature Rerating Curve Average Time Current Curves.062A.125A.160A.200A.250A.315A.375A.500A.750A 1A 1.5A 2A 2.5A 3A 3.5A 4A 5A 7A 8A 10A 12A 15A 10 Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. TIME IN SECONDS /453 Series CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering Parameters 260 C Peak Temperature, 10 seconds max. Please refer to or /453.html for current information /453 Series

64 Introduction Surface to Circuit Mount Protection Fuses NANO 2 > Very Fast-Acting > 451/453 Transientology Series Product Characteristics Body: Ceramic Terminations: Gold-Plated Caps (for 451 RoHS/HF series) Materials SnPb Plated Caps (for 451 Non-RoHS series) Silver-plated Caps (for 451 RoHS below 200mA & 453 Series) Product Marking Brand, Ampere Operating -55 C to 125 C Temperature Moisture Sensitivity Level 1, J-STD-020C Level Solderability MIL-STD-202, Method 208 Insulation Resistance (after Opening) MIL-STD-202, Method 302, Test Condition A (10,000 ohms minimum) Thermal Shock Mechanical Shock Vibration Moisture Resistance Salt Spray Resistance to Soldering Heat MIL-STD-202, Method 107, Test Condition B, 5 cycles, -65 C / +125 C, 15 each extreme MIL-STD-202, Method 213, Test I: Deenergized. G s pk amplitude, sawtooth wave 6ms duration, 3 cycles XYZ+xyz = 18 shocks MIL-STD-202, Method 201: 0.03 amplitude, Hz in 1 min. 2hrs each XYZ=6hrs MIL-STD-202, Method 106, 10 cycles MIL-STD-202, Method 101, Test Condition B (48hrs) MIL-STD-202, Method 210, Test condition B (10 sec at 260 C) Dimensions Part Numbering System 6.10 (.240") 2.69 (.106") M R L 1.45 (.057") 1.96 (.077") F 7 A 6.86 (.270") 3.15 (.124") 2.95 (.116") Recommended pad layout 2.69 (.106") SERIES 451 = Gold / SnPb / Silver Plated Caps 453 = Silver Plated Caps AMP Code Refer to Electrical characteristics table QUANTITY Code M = 0 pcs N = 5000 pcs PACKAGING Code R = Tape and Reel RoHS Compliant & Halogen Free NOTE: L suffix applies to 451 series only series may be ordered as either RoHS and HF ( L suffix) or non-rohs (no suffix) version series is available only as RoHS compliant version and does not require L suffix. Please do not include L suffix within 453 series ordering instructions. 453 series is only available from 200mA up to the highest rating specified. For ratings below 200mA, please use 451 series for ordering. Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 12mm Tape and Reel EIA RS (IEC 286, part 3) 5000 NR 12mm Tape and Reel EIA RS (IEC 286, part 3) 0 MR 451/453 Series 60 Please refer to or /453.html for current information.

65 Surface Mount Fuses NANO 2 > Slo-Blo > 452/454 Series 452/454 Series Fuse PS E Description The NANO 2 Slo-Blo fuse has enhanced inrush withstand characteristics over the NANO 2 Fast-Acting fuse. The unique time delay feature of this fuse design helps solve the problem of nuisance opening by accommodating inrush currents that normally cause a fast-acting fuse to open. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE Electrical Characteristics for Series % of Ampere E10480 LR29862 Opening Time 375mA - 7A 375mA - 7A PS E NBK E10480B 1A - 5A % 4 hours, Minimum 200% 1 sec., Min.; 60 sec., Max. 300% 0.2 sec., Min.; 3 sec., Max 800% 0.02 sec., Min.; 0.1 sec., Max. rating available (375mA to 5A) temperature range Applications de-rating equipment protection 452/454 Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x VAC/VDC x x x VDC x x x PSE: VAC x x x x x x x x x x x x x x x Notes: - l 2 t calculated at 8ms. - Resistance is measured at 10% of rated current, 25ºC VAC VDC x x PS E Please refer to or /454.html for current information. 61 Revised: December 3, /454 Series

66 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 > Slo-Blo > 452/454 Transientology Series Temperature Rerating Curve Average Time Current Curves 7.00A 5.00A 4.00A 3.50A 3.00A 2.50A 2.00A 1.50A 1.00A 750mA 500mA 375mA 10 TIME IN SECONDS 1 Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering Parameters 260 C Peak Temperature, 3 seconds max. 452/454 Series 62 Please refer to or /454.html for current information.

67 Surface Mount Fuses NANO 2 > Slo-Blo > 452/454 Series Product Characteristics Body: Ceramic Materials Terminations: Gold-plated Caps (452) / Silver-plated Caps (454) Product Marking Brand, Ampere Operating Temperature -55 C to 125 C Moisture Sensitivity Level Level 1, J-STD-020C Solderability MIL-STD-202, Method 208 Insulation Resistance (after Opening) Dimensions MIL-STD-202, Method 302, Test Condition A (10,000 ohms minimum) 1.45 (.057") 6.10 (.240") T 1 A F 2.69 (.106") 6.86 (.270") 3.15 (.124") 2.69 (.106") Thermal Shock Mechanical Shock Vibration Moisture Resistance Salt Spray Resistance to Soldering Heat Part Numbering System SERIES MIL-STD-202, Method 107, Test Condition B, 5 cycles, -65 C / +125 C, 15 each extreme MIL-STD-202, Method 213, Test I: Deenergized. G s pk amplitude, sawtooth wave 6ms duration, 3 cycles XYZ+xyz = 18 shocks MIL-STD-202, Method 201: 0.03 amplitude, Hz in 1 min. 2hrs each XYZ=6hrs MIL-STD-202, Method 106, 10 cycles MIL-STD-202, Method 101, Test Condition B (48hrs) MIL-STD-202, Method 210, Test condition B (10 sec at 260 C) M R L AMP Code Refer to Amp Code column in the Electrical Specifications table. The dot is positioned at the end of the number sequence with whole ratings and within for fractional ratings. Example: Amp product is MRL (1 amp product shown) QUANTITY Code M = 0 pcs N = 5000 pcs PACKAGING Code R = Tape and Reel RoHS Compliant & Halogen Free 452/454 Series 1.96 (.077") 2.95 (.116") Recommended pad layout NOTE: L suffix applies to 452 series only 452 series may be ordered as either RoHS and HF ( L suffix) or non-rohs (no suffix) version. 454 series is available only as RoHS and HF version and does not require L suffix. Please do not include L suffix within 454 series ordering instructions. Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 12mm Tape and Reel EIA RS (IEC 286, part 3) 5000 NR 12mm Tape and Reel EIA RS (IEC 286, part 3) 0 MR Please refer to or /454.html for current information /454 Series

68 Introduction to Circuit Protection Transientology 64

69 Surface Mount Fuses NANO 2 > 456 Series 456 Series Fuse PS E Description The High Current NANO 2 Fuse is a small square surface mount fuse that is designed to support higher current requirements of various applications. Features current fuse Halogen Free Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RATING with lead-free solder alloys and higher temperature profiles associated with leadfree assembly 20 to 40 Amperes 456 Series E A, 30A, 40A Applications PS E NBK JP A, 30A module for PC server supply Electrical Characteristics PC server % of Ampere Opening Time % 4 hours, Minimum 200% 60 seconds, Maximum Electrical Specifications Ampere (A) Amp Code Max Voltage (V) Interrupting AC 65V AC V DC 32V DC 125V AC 65V AC 32V DC Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 Sec.) Nom Voltage Drop (mv) Agency Approvals x x x x PS E V DC x Notes: 1. Cold resistance measured at less than 10% of rated current at 23 C. 2. Agency Approval Table Key: X=Approved or Certified, P=Pending. 3. I 2 t values stated for 10 msec opening time. Please refer to for current information. 65 Revised: September 21, Series

70 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 Transientology > 456 Series Temperature Rerating Curve Average Time Current Curves 20A 30A 40A 60 PERCENT OF UPRATING PERCENT OF DOWNUPRATING TIME IN SECONDS C -76 F -40 C -40 F -20 C -4 F 0 C 32 F 20 C 40 C 60 C 80 C 68 F 104 F 140 F 176 F AMBIENT TEMPERATURE C 212 F 120 C 248 F 140 C 264 F CURRENT IN AMPERES Soldering Parameters Reflow Soldering Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max. T L T S(max) T S(min) Preheat t L Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C 456 Series 66 Please refer to for current information.

71 Surface Mount Fuses NANO 2 > 456 Series Product Characteristics Materials Product Marking Insulation Resistance Body: Ceramic Cap: Silver Plated Brass Body: Brand Logo, Current MIL-STD-202, method 302, Test Condition A (10,000 ohms, Minimum) Solderability MIL-STD-202, Method 208 Resistance to Soldering Heat PCB Recommendation for Thermal Management MIL-STD-202, Method 210, Test Condition B (10 sec at 260 O C) Min. copper layer thickness = μm Min. copper trace width =20A, 30 10mm (20A, 30A) / 15mm (40A) Alternate methods of thermal management may be used. In such cases, under normal operations, the maximum temperature of the fuse body should not exceed 80 O C in a 25 O C environment. Operating Temperature Thermal Shock Vibration Moisture Sensitivity Level Moisture Resistance Salt Spray Mechanical Shock -55 O C to 125 O C with proper derating MIL-STD-202F, Method 107G, Test Condition B (5 cycles -65 O C to 125 O C) MIL-STD-202F, Method 201A (10-55 Hz) Level 1 J-STD-020C MIL-STD-202F Method 106, High Humidity (90-98%RH), Heat (65 O C) MIL-STD-202F, Method 101D, Test Condition B MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) 456 Series Dimensions Part Numbering System 20 A, 30A: 40A: F (.123 ) (.397 ) 20 A (.492) F 40 A [.123 ] 1.70 typ (0.067 ) 6.10 (.240 ) (.496 ) 3.43 (.135 ) Recommended Pad Layout (.175 ) 3.25 (.128 ) (.175 ) SERIES AMP Code Refer to Electrical characteristics table QUANTITY Code E = 2500 pcs D = 1500 pcs PACKAGING Code R = Tape and Reel E R 2.79 (.110 ) (.086 ) 0.30 (.012 ) 3.79 (.149 ) 5.72 (.225 ) 5.65 (.222 ) Recommended Pad Layout 13.3 (.524 ) Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 20A, 30A 24 mm Tape and Reel EIA RS ER 40A 24 mm Tape and Reel EIA RS (IEC 286, part 3) 1500 DR Please refer to for current information Series

72 Introduction to Circuit Protection Transientology 68

73 Surface Mount Fuses NANO 2 > 458 Series 1206 Size Inrush Withstand Fuse 458 Series Fuse Description The 458 Series Nano 2 Fuse is an ultra-small, square surface mount fuse designed to support a variety of space constrained overcurrent protection applications. Offering a 1206 size footprint, it is the smallest wire-in-air type surface mount fuse offered by Littelfuse. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE lead free soldering profiles Applications 1 to 10 Amperes 458 Series E A 10A Electrical Characteristics for Series % of Ampere Opening Time % 4 hours, Minimum Electronics 250% 5 seconds, Maximum Electrical Specifications by Item Ampere (A) Amp Code Marking Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x V x x x x x x x x Notes: 1. l 2 t values stated for 8 msec opening time 2. Cold resistance measured at less than 10% of rated current at 25 C. 3. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved 4. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options. 69 Revised: January 4, 2010 Please refer to for current information. 458 Series

74 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 > 458 Series 1206 Size Inrush Withstand Transientology Fuse Temperature Rerating Curve Average Time Current Curves Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max Time 25 C to peak Temperature (T P ) 8 minutes Max. Do not exceed 260 C 458 Series 70 Please refer to for current information.

75 Surface Mount Fuses NANO 2 > 458 Series 1206 Size Inrush Withstand Fuse Product Characteristics Materials Product Marking Insulation Resistance (after Opening) Body: Ceramic Cap: Gold Plated Brass Body: Current (Refer to Electrical Characteristic table) MIL-STD-202, Method 302, Test Condition A (10,000 ohms, Minimum) Solderability MIL-STD-202, Method 208 Resistance to Soldering Heat Moisture Sensitivity Level Dimensions MIL-STD-202, Method 210, Test Condition B (10 sec at 260 o C) Level 1 Operating Temperature Thermal Shock Vibration Moisture Resistance Salt Spray Shock Part Numbering System 55 O C to 125 O C with proper derating MIL-STD-202F, Method 107G, Test Condition B (5 cycles -65 o C to +125 o C) MIL-STD-202F, Method 201A (10-55 Hz) MIL-STD-202, Method 106, High Humidity (90-98%RH), Heat (65 o C) MIL-STD-202F, Method 101D, Test Condition B MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) 458 Series (.125 ) (.062 ) D R (.047 ) (.032 ) 3.65 (.143 ) 2.05 (.081 ) 1.28 (.050 ) (.062 ) SERIES AMP Code Refer to Electrical characteristics table QUANTITY Code D: 1500 pcs PACKAGING Code R: Tape and Reel Example: 1.5 amp product is D R (1 amp product shown above). Recommended Pad Layout Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 24mm Tape and Reel EIA-RS DR Please refer to for current information Series

76 Introduction to Circuit Protection Transientology 72

77 Surface Mount Fuses NANO 2 > 250V > Time Lag > 443 Series 443 Series Fuse Description The 250V Nano 2 Fuse is a small square surface mount fuse that is designed to enable compliance with the RoHS directive. This product is fully compatible with lead-free solder alloy and higher temperature profiles associated with lead-free assembly. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE 5.00A with lead-free solder alloys and higher temperature profiles associated with leadfree assembly 443 Series Electrical Characteristics for Series % of Ampere E A A Opening Time Applications system power in AC/DC converter converter % 4 hours, Minimum 250% 120 seconds, Maximum Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nominal Voltage Drop (mv) Agency Approvals x x x x x x x x x x Notes: 1. Cold resistance measured at less than 10% of rated current at 23 C. 2. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved 3. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options. Please refer to for current information. 73 Revised: Mar 17, Series

78 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 > 250V > Time Lag Transientology > 443 Series Temperature Rerating Curve Average Time Current Curves 0.50 A 0.75 A 1.00 A 1.50 A 2.00 A 2.50 A 3.00 A 3.50 A 4.00 A 5.00 A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPS Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering Parameters 260 C Peak Temperature, 3 seconds max. 443 Series 74 Please refer to for current information.

79 Surface Mount Fuses NANO 2 > 250V > Time Lag > 443 Series Product Characteristics Materials Product Marking Insulation Resistance (after Opening) Body: Ceramic Cap: Silver Plated Brass Body: Brand Logo, Current Rated Voltage, T - C Characteristic T MIL-STD-202, Method 302, Test Condition A (10,000 ohms, Minimum) Solderability MIL-STD-202, Method 208 Resistance to Soldering Heat Moisture Sensitivity Level PCB Recommendation for Thermal Management MIL-STD-202, Method 210, Test Condition B (10 sec at 260 o C) Level 1 J-STD-020C Min. copper layer thickness = um Min. copper trace width = 10mm Alternate methods of thermal management may be used. In such cases, under normal operations, the maximum temperature of the fuse body should not exceed 80 O C in a 25 O C ambient environment. Operating Temperature Thermal Shock Vibration Moisture Resistance Salt Spray Mechanical Shock 55 O C to 125 O C with proper derating MIL-STD-202F, Method 107G, Test Condition B (5 cycles -65 o C to +125 o C) MIL-STD-202F, Method 201A (10-55 Hz) MIL-STD-202, Method 106, High Humidity (90-98%RH), Heat (65 o C) MIL-STD-202F, Method 101, Test Condition B MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) 443 Series Dimensions 3.12 (.123") (.397") 5A T 3.12 (.123") AC250V 1.70 typ (.067") 6.10 (.240") 12.6 (.496") 3.25 (.128") Recommended Pad Layout 3.43 (.135") Part Numbering System SERIES AMP Code Refer to Electrical characteristics table QUANTITY Code D = 1500 pcs PACKAGING Code R = Tape and Reel D R Example: 1.5 amp product is D R (0.5 amp product shown above). Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 24mm Tape and Reel EIA-RS (IEC 286, part 3) 1500 DR Please refer to for current information Series

80 Introduction to Circuit Protection Transientology 76

81 Surface Mount Fuses NANO 2 > 250V UMF > Fast-Acting > 464 Series 464 Series Fuse PS E Description The Surface Mount Nano 2 250V UMF product family complies with IEC Publication IEC Universal Modular Fuse-Links [UMF]. This IEC standard has been accepted by UL/CSA making it the first global fuse standard. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE Universal Modular Fuse-Links (UMF), 250V Halogen Free 464 Series PS E NBK30502-E108480A 1A - 6.3A E184655A,B 500mA - 6.3A Applications Electrical Characteristics for Series % of Ampere Opening Time 125% 1 hour, Minimum 200% 2 minutes, Maximum 0% sec., Min.; 0.01 sec., Max. Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nominal Voltage Drop (mv) Agency Approvals x x x x x x x x x x x x x x x x x x x x Notes: - l 2 t calculated at 8ms. - Resistance is measured at 10% of rated current, 25ºC - For information and availability of additional ratings please contact Littelfuse PS E Please refer to for current information. 77 Revised: September 11, Series

82 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 > 250V vvumf > Fast-Acting Transientology > 464 Series Temperature Rerating Curve Average Time Current Curves.50 A.80 A 1.00 A 1.25 A 1.60 A 2.00 A 2.50 A 3.15 A 4.00 A 5.00 A 6.30 A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 15% for continuous operation CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering Parameters 260 C Peak Temperature, 10 seconds max. 464 Series 78 Please refer to for current information.

83 Surface Mount Fuses NANO 2 > 250V UMF > Fast-Acting > 464 Series Product Characteristics Materials Body: Ceramic Terminations: Silver-plated Caps Product Marking Brand, Ampere, Voltage, UMF Logo Operating Temperature -55 C to 125 C Moisture Sensitivity Level Level 1, J-STD-020C Solderability IEC Insulation Resistance (after IEC (0.1Mohm 500VDC) Opening) Dimensions 4.5 (.177") 2.8 (.11") 12.1 (.475") FF500mAL AC250V TOP VIEW 5.6 (.22") Recommended pad layout 6.7 (.264") 6.9 (.27") WAVE SOLDER 3.5 (.14") Thermal Shock Mechanical Shock Vibration Moisture Resistance Salt Spray Resistance to Soldering Heat Part Numbering System SERIES AMP Code* Refer to Electrical Characteristics table QUANTITY Code D = 1500 pcs MIL-STD-202, Method 107, Test Condition B, 5 cycles, -65 C / +125 C MIL-STD-202, Method 213, Test Condition A MIL-STD-202, Method 201 (10-55 Hz) MIL-STD-202, Method 106, 10 cycles MIL-STD-202, Method 101, Test Condition B (48hrs) IEC D R 464 Series END CAP 4.5 (.177") Height 5.6 (.22") 6.8 (.264") REFLOW SOLDER PACKAGING Code R = Tape and Reel *Example: 2.5 amp product is DR (1 amp product shown above). Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 24mm Tape and Reel EIA RS (IEC 286, part 3) 1500 DR Please refer to for current information Series

84 Introduction to Circuit Protection Transientology 80

85 Surface Mount Fuses NANO 2 > 250V UMF Time Lag > 465 Series 465 Series Fuse PS E Description The Surface Mount Nano 2 250V UMF product family complies with IEC Publication IEC Universal Modular Fuse-Links [UMF]. This IEC standard has been accepted by UL/CSA making it the first global fuse standard. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE Universal Modular Fuse-Links (UMF), 250V Halogen Free 465 Series PS E NBK E108480B 1A - 6.3A Applications E184655A,B 250mA - 6.3A Electrical Characteristics for Series % of Ampere Opening Time 125% 1 hour, Minimum 200% 2 minutes, Maximum 0% 0.01 sec., Min.; 0.1 sec., Max. Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x x x x x x x Notes: - l 2 t calculated at 8ms. - Resistance is measured at 10% of rated current, 25ºC - For information and availability of additional ratings please contact Littelfuse PS E Please refer to for current information. 81 Revised: September 11, Series

86 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 > 250V UMF Time Lag Transientology > 465 Series Temperature Rerating Curve Average Time Current Curves 1 A 1.25 A 1.6 A 2 A 2.5 A 3.15 A 4 A 5 A 6.3 A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 15% for continuous operation CURRENT IN AMPERES Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Wave Soldering Parameters 260 C Peak Temperature, 3 seconds max. 465 Series 82 Please refer to for current information.

87 Surface Mount Fuses NANO 2 > 250V UMF Time Lag > 465 Series Product Characteristics Materials Body: High Performance Ceramic Terminations: Silver plated brass. Product Marketing Brand, Ampere, Voltage, UMF Logo Operating Temperature 55 O C to 125 O C. Moisture Sensitivity Level Level 1, J-STD-020C Solderability IEC Insulation Resistance (after opening Shock Dimensions 4.5 (.177") 2.8 (.11") END CAP 12.1 (.475") FT500mAL AC250V TOP VIEW 4.5 (.177") Height IEC (0.1Mohm 500VDC) MIL-STD-202, Method 213, Test Condition A 5.6 (.22") 5.6 (.22") 6.7 (.264") 6.9 (.27") WAVE SOLDER 3.5 (.14") 6.8 (.264") REFLOW SOLDER Thermal Shock Mechanical Shock Vibration Moisture Resistance Salt Spray Resistance to Soldering Heat Part Numbering System SERIES AMP Code* Refer to Electrical Characteristics table QUANTITY Code D = 1500 pcs PACKAGING Code R = Tape and Reel MIL-STD-202, Method 107, Test Condition B, 5 cycles, 65 O C to 125 C MIL-STD-202, Method 213, Test Condition A MIL-STD-202, Method 201 (10-55 Hz) MIL-STD-202, Method 106, 10 cycles MIL-STD-202, Method 101, Test Condition B (48hrs) IEC D R *Example: 2.5 amp product is DR (0.5 amp product shown above). 465 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 24mm Tape and Reel EIA RS (IEC 286, part 3) 1500 DR Please refer to for current information Series

88 Introduction to Circuit Protection Transientology 84

89 Surface Mount Fuses Surge Resistant > 461 Series TeleLink Fuse 461 Series TeleLink Fuse Description Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 LR29862 Electrical Characteristics for Series % of Ampere Opening Time 500mA - 2A 500mA - 2A % 4 hours, Minimum 250% 1 sec., Min.; 120 secs., Max. Maximum Temperature Rise Telecom Nano 2 Fuse Temperature Reading < 82 C (180 F) < 50 C (122 F) Higher Currents and PCB layout designs can affect this parameter. Readings are measured at rated current after temperature stabilizes. The Littelfuse 461 Series TeleLink Surface Mount, Surge Resistant Fuse, offers over-current protection for a wide range of telecom applications without requiring a series resistor. When used in conjunction with a Littelfuse SIDACtor Transient Voltage Suppressor (TVS) or a Greentube TM Gas Plasma Arrestor, this combination provides a compliant solution for standards and recommendations such as GR-1089 Core, TIA-968-A, UL/ EN/IEC 60950, and ITU K.20 and K.21. The coordination requirement contained in GR-1089 Core, and ITU K.20/21 may require a series of impedance devices. Features resistant Slo-Blo fuse Edition power cross requirements standard alone compliance with Telcordia GR-1089-CORE and TIA- 968-A (formerly FCC Part 68) Surge Specifications protection with Littelfuse SIDACtor Transient Voltage Suppressor (TVS) or a Greentube TM Gas Plasma Arrestor, without series resistors the requirements of a wide range of telecommunication and networking equipment temperature rise performance under 2.2A surge current testing when compared with 1.25A rating and RoHS compliant and compatible with leadfree solder and higher temperature profiles when ordered with Standard Silver Plated Brass Caps RoHS Compliant and compatible with leadfree solders and higher temperature profiles 461 Series Applications Fiber to the Premises (FTTP) locations and Remote Terminals (RT) VDSL2+ machines, telephones, fax machines, and security systems Please refer to for current information. 85 Revised: September 11, Series

90 Introduction Surface to Circuit Mount Protection Fuses Surge Resistant > 461 Series TeleLink Transientology Fuse Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x VAC x x x x 1 I 2 t is calculated at 10 msecs. or less. I 2 t at 10 times rated current has a typical value of: 24 A 2 sec (2.0A), 22 A 2 sec (1.25A), 1.3 A 2 sec (0.5A). Temperature Rerating Curve Average Time Current Curves.500A 1.25A 2A 10 TIME IN SECONDS Note: 1. Rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation CURRENT IN AMPERES GR 1089 Inter-building requirements GR st level lighting surge inter-building (Equipment under test can not be damaged and must continue to operate properly) Surge Minimum Peak Voltage (V) Minimum Peak Current (A) Max. Rise/Min. Decay (μs) Repetitions Each Polarity Fuse Choices / , / , / , / , / , 1.25, 2.0 If sufficient series resistance is used, then the 0.5 fuse may be used in test conditions 1-4. GR nd level lightning surge telecom port (Equipment under test shall not become a fire or electrical safety hazard) Surge Minimum Peak Voltage (V) Minimum Peak Current (A) Max. Rise/Min. Decay (μs) Repetitions Each Polarity Fuse Choices / , 1.25, 2.0 Alternative /8=625 8/ , 1.25, 2.0 The 0.5 fuse will open during these test conditions. The 1.25 & 2.0 will not open thus providing operational compliance. 461 Series 86 Please refer to for current information.

91 Surface Mount Fuses Surge Resistant > 461 Series TeleLink Fuse GR 1089 AC power fault 1st level inter-building (fuse not allowed to open) Test Vrms Short Circuit Current (A) Hits Duration Primary Protector Fuse Choices min. removed 1.25, min. removed 1.25, ,400, sec. removed 1.25, sec. operative 1.25, Diagram Diagram 60 5 secs. removed 1.25, secs. removed 1.25, secs. removed 1.25, secs. removed 1.25, sec. in place 1.25, 2.0 GR 1089 AC power fault 2nd level (fuse can open but must open in a safe and controlled manner) Test Circuit Vrms Short Circuit Current (A) Duration Fuse 1 120, min. 0.5, 1.25, secs. 0.5, 1.25, secs. 0.5, 1.25, min.. 0.5, 1.25, Diagram Diagram 15 min. 0.5, 1.25, 2.0 Fuse must open before wiring simulator fuse (MDL 2.0). TIA 968-A (formerly FCC Part 68) Surge Waveforms (fuse can not open during type B events) Surge Voltage (V) Waveform (μs) Current (A) Repetitions Recommended Fuse Metallic A x ea. polarity 1.25 Longitudinal A x ea. polarity 1.25 Metallic B 0 9 x ea. polarity 1.25 Longitudinal B x ea. polarity 1.25 For the type A events the 0.5 fuse will open, providing non-operational compliance. The 1.25 & 2.0 will not open, providing for operational compliance with TIA-968-A type A surge events. 461 Series UL requirements UL60950 (EN 60950) (formerly UL 1950) Power Cross (L = longitudinal, M = metallic) Test Number Voltage (V) Current (A) Time Fuse Choices L secs. 0.5, 1.25, 2.0 L secs. 0.5, 1.25, 2.0 L min. 0.5, 1.25, 2.0 L min. 0.5, 1.25, 2.0 L min. 0.5, 1.25, 2.0 M secs. 0.5, 1.25, 2.0 M secs. 0.5, 1.25, 2.0 M min. 0.5, 1.25, 2.0 M min. 0.5, 1.25, 2.0 Selection of test number depends on current limiting F fire enclosure/spacing of end product Fuse must open before the wiring simulator fuse (MDL 2.0). Dimensions 3.12 (.123") (.397") LF 1.25A T 1.70 typ (.067") 3.12 (.123") 6.10 (.240") 12.6 (.496") 3.25 (.128") Recommended Pad Layout 3.43 (.135") UL60950 (EN 60950) (formerly UL 1950) Impulse Test and Steady-State Electric Strength Test Test Voltage (V) Current (A) Waveform Repetitions Fuse Choices Impulse For handheld units x 700ms +/- 10 w/60 secs. rest 0.5, 1.25, 2.0 Non handheld x 700ms +/- 10 w/60 secs. rest 0.5, 1.25, 2.0 Steady-State For handheld units Hz 0.5, 1.25, 2.0 Non handheld 0 60Hz 0.5, 1.25, 2.0 Please refer to for current information Series

92 Temperature Introduction Surface to Circuit Mount Protection Fuses Surge Resistant > 461 Series TeleLink Transientology Fuse Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) seconds T L T S(max) t L Average Ramp-up Rate (Liquidus Temp (T L ) to peak) 5 C/second max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 6 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C Product Characteristics Materials Product Marking Operating Temperature Moisture Sensitivity Level Solderability Resistance to Dissolution of Metallization Part Numbering System SERIES Body: Ceramic Terminations: Silver-plated Caps Brand Logo, Ampere -55 C to 125 C Level 1, J-STD-020C IEC (215 C immersion, 3 seconds) IPC / EIA J-STD-002A-Test D 260 C for 120 seconds E R Thermal Shock Mechanical Shock High Frequency Vibration Moisture Resistance Terminal Strength Terminal Attachment MIL-STD-202, Method 107, Test Condition B, -55 C to +125 C, 30 each extreme MIL-STD-202, Method 213, Test Condition A - Half Sine, 50 G's, 11 msecs. duration MIL-STD-202, Method 204, Test Condition D MIL-STD-202, Method 106, 50 cycles Board deflection per EIA / IS-722, 1mm deflection for 1 minute MIL-STD-202, Method 211, Test Condition A, 5 lbs applied to end caps AMP Code * Refer to Electrical Characteristics table QUANTITY Code E = 2500 pcs PACKAGING Code R = Tape and Reel *Example: 2 amp product is 0462.ER (1.25 amp product shown above) Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 24mm Tape and Reel EIA RS (IEC 286, part 3) 2500 ER 461 Series 88 Please refer to for current information.

93 Surface Mount Fuses Surge Resistant > 461E Series Enhanced TeleLink Fuse 461E Series Enhanced TeleLink Fuse Description Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 Electrical Characteristics for Series % of Ampere Opening Time 1.25 A % 4 Hours, Minimum 2.2A (176%) 300 Seconds, Maximum 200% Maximum Temperature Rise Telecom Nano 2 Fuse 1 Second, Minimum; 60 Seconds, Maximum Temperature Reading E < 82 C (180 F) Higher Currents and PCB layout designs can affect this parameter. Readings are measured at rated current after temperature stabilizes. The Littelfuse 461E Series Enhanced TeleLink Surface Mount, Surge Tolerant Fuse, is the next generation of the popular 461 Telelink Fuse. With optimized opening times at certain overload conditions, this enhanced TeleLink Fuse works in harmony with Littelfuse s new SIDACtor Transient Voltage Suppressor products in the QFN package. This combination provides a compliant solution for standards and recommendations, such as, GR 1089 Core, TIA 968 A, UL/EN/IEC and ITU K.20/.21. The coordination requirement contained in GR 1089 Core and ITU K.20/.21, may require a series impedance device. Features Resistant Slo-Blo Fuse. 3rd Edition, Power Fault Requirements stand alone. with Telcordia GR 1089 CORE and TIA 968 A (formerly FCC Part 68) Surge Specifications. the requirements of a wide range of telecommunication and networking equipment. Applications compliant overcurrent protection with Littelfuse SIDACtor, TVS or GDT, without the need of any additional resistance. compliant and compatible with leadfree solders and higher temperature profiles. Fiber to the Premises (FTTP) locations and Remote Terminals (RT) VDSL2+ machines, telephones, fax machines, and security systems 461E Series Please refer to for current information. 89 Revised: Feb 18, E Series

94 Introduction Surface to Circuit Mount Protection Fuses Surge Resistant > 461E Series Enhanced TeleLink Transientology Fuse Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals VAC x I 2 t is calculated at 10 msec or less. I 2 t at 10 times rated current has a typical value of 17 A 2 sec (1.25A) Resistance is measured at 10% rated current. Temperature Rerating Curve Average Time Current Curves 1.25A 10 TIME IN SECONDS Operating Temperature is -55 C to +125 with proper correction factor applied. Ambient temperature effects are in addition to the normal derating. Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPERES 0 GR 1089 Inter-Building Requirements GR st level lighting surge inter-building (Equipment under test can not be damaged and must continue to operate properly) Surge Minimum Peak Voltage (V) Minimum Peak Current (A) Max. Rise/Min. Decay (μs) Repetitions Each Polarity / / / / /360 5 GR nd level lightning surge telecom port (Equipment under test shall not become a fire or electrical safety hazard) Surge Minimum Peak Voltage (V) Minimum Peak Current (A) Max. Rise/Min. Decay (μs) Repetitions Each Polarity /10 1 Alternative /8=625 8/10 1 The 1.25 will not open thus providing operational compliance. 461E Series 90 Please refer to for current information.

95 Surface Mount Fuses Surge Resistant > 461E Series Enhanced TeleLink Fuse GR 1089 AC power fault 1st level inter-building (fuse not allowed to open) Test Vrms Short Circuit Current (A) Hits Duration Primary Protector min. removed min. removed 3 200,400, sec. removed sec. operative 5 Diagram Diagram 60 5 sec. removed sec. removed sec. removed sec. removed sec. in place GR 1089 AC power fault 2nd level (fuse can open but must open in a safe and controlled manner) Test Circuit Vrms Surge Voltage (V) Waveform (μs) Current (A) Reps Metallic A x ea. polarity Longitudinal A x ea. polarity Metallic B 0 9 x ea. polarity Longitudinal B x ea. polarity Short Circuit Current (A) Duration 1 120, min sec sec min. 5 Diagram Diagram 15 min. Fuse must open before wiring simulator fuse (MDL 2.0). TIA 968-A (formerly FCC Part 68) Surge Waveforms (fuse can not open during type B events) 461E Series For the type A events the fuse will not open, providing for operational compliance with TIA-968-A type A surge events. UL requirements UL60950 (EN 60950) (formerly UL 1950) Power Cross (L = longitudinal, M = metallic) Test Number Voltage (V) Current (A) Time L sec. L sec. L min. L min. L min. M sec. M sec. M min. M min. Selection of test number depends on current limiting F fire enclosure/spacing of end product Fuse must open before the wiring simulator fuse (MDL 2.0). Dimensions 3.12 (.123") (.397") LF 1.25A 1.70 typ (.067") 3.12 (.123") 6.10 (.240") 12.6 (.496") 3.25 (.128") Recommended Pad Layout 3.43 (.135") UL60950 (EN 60950) (formerly UL 1950) Impulse Test and Steady-State Electric Strength Test Test Voltage (V) Current (A) Waveform Repetitions Impulse For handheld units x 700ms -/+ 10 w/60 Sec. rest Non handheld x 700ms -/+ 10 w/60 Sec. rest Steady-State For handheld units Hz Non handheld 0 60Hz Please refer to for current information E Series

96 Temperature Introduction Surface to Circuit Mount Protection Fuses Surge Resistant > 461E Series Enhanced TeleLink Transientology Fuse Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) Seconds T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/Sec. Max. T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/Sec. Max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) Seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) Seconds Ramp-down Rate 6 C/Sec. Max. Time 25 C to peak Temperature (T P ) 8 Minutes Max. Do not exceed 260 C Product Characteristics Materials Product Marking Operating Temperature Moisture Sensitivity Level Solderability Resistance to Dissolution of Metallization Body: Ceramic Terminations: Silver-plated Caps Brand Logo, Ampere -55 C to +125 C Level 1, J STD 020C IEC (215 C immersion, 3 Sec.) IPC / EIA J STD 002A Test D 260 C for 120 Sec. Thermal Shock Mechanical Shock High Frequency Vibration Moisture Resistance Terminal Strength Terminal Attachment MIL STD 202, Method 107, Test Condition B, 200 cycles, -55 C to +125 C, 30 each extreme MIL STD 202, Method 213, Test Condition A Half Sine, 50 G's, 11 msec duration MIL STD 202, Method 204, Test Condition D MIL STD 202, Method 106, 50 cycles Board deflection per EIA / IS 722, 1mm Deflection for 1 Minute MIL STD 202, Method 211, Test Condition A, 5 lbs applied to end caps Part Numbering System E E R SERIES AMP Code Enhanced TELELINK QUANTITY Code E = 2500 pcs PACKAGING Code R = Tape and Reel Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 24mm Tape and Reel EIA RS (IEC 286, part 3) 2500 ER 461E Series 92 Please refer to for current information.

97 Surface Mount Fuses NANO 2 > 154 OMNI-BLOK Fuse and Holder Combination 154/154T/154L/154TL Series OMNI-BLOK Fuse and Holder Assembly PS E Description Agency Approvals Approved by METI from 1 through 5 amperes. AGENCY PS E AGENCY FILE NUMBER NBK E10480A NBK E10480B NBK E AMPERE RANGE 154 Fast-Acting: 1A 154 Fast-Acting: 1A - 5A 154 Time-Lag: 1A - 5A 154 Fast-Acting: 6.3A - 10A The RoHS compliant 154 Series OMNI-BLOK offers a solution for efficient installation and easy replacement of miniature Nano 2 surface mount fuses. Offered in a tape and reel package, this fuse and holder combination can be installed on a PC board as an efficient single step. Fuse replacement can be accomplished without exposing the PC board to the detrimental effects of solder heat. The fuse holder unit may be sold as a stand-alone item, shipped in bulk quantity (not pre-packaged in tape and reel cartridges) using part number Please contact Littelfuse for additional information. Features Halogen Free Time-Lag options available of Nano 2 type fuses de-rating rating available - Fast-Acting: 62mA - 10A - Time-Lag: 375mA - 5A temperature range UL94 V-0 capable fuseholder 154 Series Ordering Information With Very Fast-Acting Fuse Installed Catalog Number Ampere (A) Amp Code Fuse Furnished * With Time-Lag (Slo-Blo ) Fuse Installed Catalog Number Ampere (A) Amp Code Fuse Furnished * T T T T T T T T T T T T * The 453 and 454 Series fuses identified above have silver-plated end caps, designed to accommodate solder reflow processes: For 453 Series fuse replacement, either 451, 453 or 448 Series may be used. For 454 Series fuse replacement, either 452, 454 or 449 Series may be used. For detailed operating characteristic and performance information for each of the fuse series mentioned above, please refer to their respective data available online at Please refer to or /154T.html for current information. 93 Revised: February 1, Series

98 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 > 154 OMNI-BLOK Fuse and Holder Transientology Combination Soldering Parameters For 0154XXX.DR/DRT For 0154XXX.DRL/DRTL Reflow Condition Sn-Pb Eutectic Assembly Reflow Condition Pb Free assembly - Temperature Min (T s(min) ) C Pre Heat - Temperature Max (T s(max) ) 150 C - Time (Min to Max) (t s ) seconds Average Ramp-up Rate (Liquidus Temp (T L ) to peak) 3 C/second max. Reflow - Temperature (T L ) (Liquidus) 183 C - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 6 C/second max. Time 25 C to peak Temperature (T P ) 6 minutes max. Do not exceed 230 C T P Ramp-up t P Critical Zone TL to TP - Temperature Min (T s(min) ) 150 C Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) seconds Average Ramp-up Rate (Liquidus Temp (T L ) to peak) 5 C/second max. T S(max) to T L - Ramp-up Rate 5 C/second max. Reflow - Temperature (T L ) (Liquidus) 217 C - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C T L T S(max) t L T S(min) Preheat t S Ramp-down Product Characteristics Operating Temperature -55ºC to 125ºC 25 time to peak temperature (t 25ºC to peak) Time Dimensions Part Numbering System LF 7 A SERIES D R T L L F 9.73 (.383") REF (.084") REF (.418") FUSE 4.24 (.167") Recommended Pad Layout 3.81 (.150") 3.81 (.150") 5.03 (.198") AMP Code Refer to Ordering information section on previous page. QUANTITY Code D = 1500 pcs PACKAGING Code R = Tape and Reel TYPE Code T = Time-Lag (Slo-Blo ) 260 C REFLOW CAPABLE Add L suffix for 260 C Capable OMNI Example: 1.5 amp Fast-acting product is DR. 1.5 amp Time-lag product is DRT. (1 amp product shown above). Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Reel Pack EIA RS (IEC 286, part 3) 1500 DR 154 Series 94 Please refer to or /154T.html for current information.

99 Surface Mount Fuses NANO 2 > 157 Fuse and Holder Combination 157 Series Standard Nano Fuse and Clip Assembly PS E Description Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE PS E E14721 NBK E10480A NBK E10480B NBK E Electrical Characteristics for Series 0.062A ~ 10A 1A 1.5A - 5A 6.3A - 10A % of Ampere Opening Time at 25ºC % 4 hours Minimum 200% 5 secs. Maximum The 157 Series Standard Nano Fuse/Clip assembly is a small, square, very fast acting surface mount fuse that is assembled in surface mountable fuse clips. The fuse clip and pre-installed fuse combination can be automatically placed in PC Board in one efficient manufacturing operation. It permits quick and easy replacement of fuses without performing desoldering process, even in the field and without exposing the PC Board to detrimental effects of rework solder heat. Features Very Fast Acting Fuse. RoHS/Pb-Free solder alloys and higher temperature profiles associated with leadfree assembly. Applications on PC Board (Field Replaceable) Halogen Free ~ 10 Amperes. 157 Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) 1. Cold resistance measured at less than 10% of rated current at 23ºC. 2. I 2 t values stated for 8ms opening time. Interrupting (A) Fuse Furnished Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals X X X X X X X X X X X X VAC/VDC X X X X VDC X X X X X X X X X X X X X X X X X X X X X X X X X X VAC / VDC 32VDC X X 3. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved 4. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options. PS E Please refer to for current information. 95 Revised: February 19, Series

100 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 > 157 Fuse and Holder Transientology Combination Temperature Rerating Curve Average Time Current Curves 0.062A A 0.2 A 0.25 A 0.315A A 0.5 A 0.75 A 1.0 A 1.50 A 2.0 A 2.50 A 3.0 A 4.0 A 3.50 A 5.0 A 6.30 A 7.0 A 10.0 A 8.0 A Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. TIME IN SECONDS CURRENT IN AMPS Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max. T L T S(max) T S(min) Preheat t L Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max. t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C 157 Series 96 Please refer to for current information.

101 Surface Mount Fuses NANO 2 > 157 Fuse and Holder Combination Product Characteristics Materials Product Marking Clip Retention Solderability Humidity Test Resistance to Solvents Dimensions LF Body: Ceramic Cap: For 0.062A ~ 0.125A Au plated Brass For 0.200A ~ 10A Silver plated Brass Clip Plating: Matte Tin Body: Brand Logo, Current Force applied at fuse center, perpendicular to the long axis (@ 0.75 lbs. MIN) MIL-STD-202, Method 208 / IPC/ EIA / JEDEC J-STD002B, Test Condition A MIL STD-202, Method 85ºC / 85%RH, 0 hours MIL-STD-202, Method 215 (3 solvent types) 6.50 ± 0.20 [0.256] 6.10 [0.240] 1A 3.7 ± 0.13 [0.146] 2.69 [0.106] 2.69 [0.106] Operating Temperature Thermal Shock Vibration Moisture Resistance Salt Spray/ Atmosphere Shock Part Numbering System SERIES AMP CODE D R -55ºC to 125ºC with proper derating MIL-STD-202, Method 107, Test Condition B (5 cycles -65ºC to +125ºC) MIL-STD-202, Method 201 (10-55 Hz) MIL-STD-202, Method 106, 10 cycles MIL-STD-202, Method 101, Test Condition B (48 hrs.), 5% NaCl in De-ionized Water MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) PACKING OPTION R = Tape and Reel 157 Series 1.45 [0.057] 3.70 [0.146] QUANTITY CODE D = 1500 pcs 3.90 ± 0.13 [0.154] 2.50 ± 0.2 [0.098] 3.40 [0.134] "A" 0.10 "B" 7.26 [0.29] 3.00 [0.12] 2.46 [0.10] 2.40 [0.09] PCB Recommendation for Thermal Management 1. Minimum Copper Layer Thickness = um 2. Minimum Copper Trace Width = 10mm Note: Alternate methods of thermal management may be used. In such cases, under normal operations, the maximum temperature of the fuse body should not exceed 80ºC in a 25ºC ambient environment. Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Tape and Reel Surface Mount 1500 DR Please refer to for current information Series

102 Introduction to Circuit Protection Transientology 98

103 Surface Mount Fuses NANO 2 > 157T Fuse and Holder Combination 157T Series Standard Nano Fuse and Clip Assembly PS E Description The 157T Series Fuse/Clip assembly is a small, square, Time-Lag, surface mount fuse that is assembled in surface mountable fuse clips. The unique time delay feature of this fuse design helps solve the problem of nuisance opening by accommodating inrush currents that normally cause a fast acting fuse to open. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE PS E E14721 NBK E10480A NBK E10480B Electrical Characteristics for Series % of Ampere % of Ampere 0.375A ~ 5A 1A 1.5A-5A Opening Time at 25ºC % 0.375A ~ 5A 4 hours, Minimum 200% 0.375A ~ 5A 300% 0.375A ~ 5A 800% 0.375A ~ 5A 1 sec. Minimum, 60 secs. Maximum 0.20 secs. Minimum, 3.00 secs. Maximum 0.02 secs. Minimum, 0.10 secs. Maximum The fuse clip and pre-installed fuse combination can be automatically placed in PC Board in one efficient manufacturing operation. It permits quick and easy replacement of fuses without performing desoldering process, even in the field and without exposing the PC Board to detrimental effects of rework solder heat. Features Time-Lag Fuse. RoHS/Pb-Free solder alloys and higher temperature profiles associated with leadfree assembly. Applications on PC Board (Field Replaceable) Halogen-free ~ 5 Amperes. 157T Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting (A) Fuse Furnished Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals X X X X X X X VAC/VDC X X X X X X X X X X X X 1. Cold resistance measured at less than 10% of rated current at 23ºC. 2. I 2 t values stated for 8ms opening time. 3. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved 4. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options PS E Please refer to for current information. 99 Revised: February 19, T Series

104 Temperature Introduction Surface to Circuit Mount Protection Fuses NANO 2 > 157T Fuse and Holder Transientology Combination Temperature Rerating Curve Average Time Current Curves.375A.50A.75A 1.0A 1.5A 2.0A 2.5A 3.0A 3.5A 4A 5A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPS Soldering Parameters Reflow Condition - Temperature Min (T s(min) ) 150 C Pb Free assembly T P Ramp-up t P Critical Zone TL to TP Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) secs T L T S(max) t L Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max T S(min) Preheat Ramp-down T S(max) to T L - Ramp-up Rate 5 C/second max t S - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 5 C/second max Time 25 C to peak Temperature (T P ) 8 minutes Max. Do not exceed 260 C 157T Series Please refer to for current information.

105 Surface Mount Fuses NANO 2 > 157T Fuse and Holder Combination Product Characteristics Materials Product Marking Clip Retention Solderability Humidity Test Resistance to Solvents Dimensions 1.45 [0.057] LF Body: Ceramic Cap: For 0.375A ~ 5A Silver plated Brass Clip Plating: Matte Tin Body: Brand Logo, Current, T for Time-Lag Force applied at fuse center, perpendicular to the long axis (@0.75 lbs. MIN) MIL-STD-202, Method 208 / IPC/ EIA / JEDEC J-STD002B, Test Condition A MIL STD-202, Method 85ºC / 85%RH, 0 hours MIL-STD-202, Method 215 (3 solvent types) 6.50 ± 0.20 [0.256] 6.10 [0.240] 1 A T 3.7 ± 0.13 [0.146] 2.69 [0.106] 3.70 [0.146] 2.69 [0.106] Operating Temperature Thermal Shock Vibration Moisture Resistance Salt Spray/ Atmosphere Shock Part Numbering System SERIES AMP CODE D R T -55ºC to 125ºC with proper derating MIL-STD-202, Method 107, Test Condition B (5 cycles -65ºC to +125ºC) MIL-STD-202, Method 201 (10-55 Hz) MIL-STD-202, Method 106, 10 cycles MIL-STD-202, Method 101, Test Condition B (48 hrs.), 5% NaCl in De-ionized Water MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) TIME-LAG FUSE PACKING OPTION R = Tape and Reel QUANTITY CODE D = 1500 pcs 157T Series 3.90 ± 0.13 [0.154] 3.40 [0.134] 2.50 ± 0.2 [0.098] "A" 0.10 "B" 7.26 [0.29] 3.00 [0.12] 2.46 [0.10] 2.40 [0.09] PCB Recommendation for Thermal Management 1. Minimum Copper Layer Thickness = um 2. Minimum Copper Trace Width = 10mm Note: Alternate methods of thermal management may be used. In such cases, under normal operations, the maximum temperature of the fuse body should not exceed 80ºC in a 25ºC ambient environment. Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Tape and Reel Surface Mount 1500 DRT Please refer to for current information T Series

106 Introduction to Circuit Protection Transientology 102

107 Surface Mount Fuses 159 Fuse and Clip Series 159 Series Telelink Fuse and Clip Assembly Description The 159 Series product is a metal fuse clip with preinstalled Littelfuse 461 Series TeleLink fuse. This fuse and clip combination can be automatically installed in PC Boards in one efficient manufacturing operation. It permits quick and easy fuse replacement without exposing the PC Board and other components to risks of rework solder heat as required with direct surface mount fuses. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE Electrical Characteristics for Series % of Ampere Opening Time % 4 hours, Minimum 250% E A, 1.25A, 2.0A 1 sec., Minimum 120 secs., Maximum It meets UL power cross requirements and is designed to allow compliance with Telcordia GR CORE and TIA-968-A Surge Specifications. The product provides coordinated protection with Littelfuse SIDACtor protection thyristors without series resistors. Features easily-replaceable fuse alternative compatible with automated PCB surface mount equipment surge resistant Littelfuse 461 series TeleLink Time-Lag Slo-Blo fuse compliance with Telcordia GR-1089-CORE and TIA- 968-A (formerly FCC Part 68) Surge Specifications protection with Littelfuse SIDACtor devices and GDTs, without series resistors Halogen Free with RoHS/lead-free solder alloys and higher temperature profiles associated with lead-free assembly Amperes 159 Series Applications modems, answering machines, telephones, fax machines, and security systems - SLIC interface portion of Fiber to the Curb (FTTC) and Fiber to the Premises (FTTP) - Non-Fiber SLIC interface for Central Office (CO) locations and Remote Terminals (RT) - xdsl applications such as ADSL, ADSL2+, VDSL, and VDSL2+ - Ethernet 10//0BaseT - ISDN U interface - Baystation T1/E1/J1, T3 (DS3) trunk cards Please refer to for current information. 103 Revised: September 11, Series

108 Introduction Surface to Circuit Mount Protection Fuses 159 Fuse and Transientology Clip Series Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x VAC x x 1 I 2 t is calculated at 10 msecs. or less. I 2 t at 10 times rated current has a typical value of: 24 A 2 sec (2.0A), 22 A 2 sec (1.25A), 1.3 A 2 sec (0.5A). C. Temperature Rerating Curve Average Time Current Curves.500A 1.25A 2A 10 TIME IN SECONDS Note: 1. Rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation Maximum Temperature Rise Telecom Nano 2 Fuse Opening Time CURRENT IN AMPERES o C (180 o F) o C (122 o F) TIA-968-A (formerly FCC part 68) Surge Waveforms (fuse can not open during type B events) Surge Voltage (V) Waveform (μs) Current (A) Repititions Recommended Fuse Metallic A x ea. polarity 1.25 Longitudinal A x ea. polarity 1.25 Metallic B 0 9 x ea. polarity 1.25 Longitudinal B x ea. polarity 1.25 For the type A events the 0.5 fuse will open, providing non-operational compliance. The 1.25 & 2.0 will not open, providing for operational compliance with TIA-968-A type A surge events. 159 Series 104 Please refer to for current information.

109 Surface Mount Fuses 159 Fuse and Clip Series GR 1089 Inter-building requirements GR st level lighting surge inter-building (Equipment under test can not be damaged and must continue to operate properly) Surge GR 1089 AC power fault 1st level inter-building (fuse not allowed to open) Test Minimum Peak Voltage (V) Vrms Minimum Peak Current (A) Short Circuit Current (A) Max. Rise/Min. Decay (μs) Repetitions Each Polarity Hits Duration Primary Protector Fuse Choices / , / , / , / , / , 1.25, 2.0 If sufficient series resistance is used, then the 0.5 fuse may be used in test conditions 1-4. Fuse Choices min. removed 1.25, min. removed 1.25, ,400, sec. removed 1.25, sec. operative 1.25, Diagram Diagram 60 5 secs. removed 1.25, secs. removed 1.25, secs. removed 1.25, secs. removed 1.25, sec. in place 1.25, 2.0 GR nd level lightning surge telecom port (Equipment under test shall not become a fire, fragmentation, or electrical safety hazard) Surge Minimum Peak Voltage (V) Minimum Peak Current (A) GR 1089 AC power fault 2nd level (fuse can open but must open in a safe and controlled manner) Test Short Vrms Circuite (A) Duration Fuse 1 120, min. 0.5, 1.25, secs. 0.5, 1.25, secs. 0.5, 1.25, min.. 0.5, 1.25, Diagram Diagram 15 min. 0.5, 1.25, 2.0 Fuse must open before wiring simulator fuse (MDL 2.0). Max. Rise/Min. Decay (μs) Repetitions Repetitions Each Polarity Fuse Choices / , 1.25, 2.0 Alternative /8=625 8/ , 1.25, 2.0 The 0.5 fuse will open during these test conditions. The 1.25 & 2.0 will not open thus providing operational compliance. 159 Series UL60950 Requirements UL (EN 60950, formerly UL 1950) Power Cross Test (L=Longitudinal, M=Metallic) Test Number Voltage (V) Current (A) Time Fuse Choices L secs. 0.5, 1.25, 2.0 L secs. 0.5, 1.25, 2.0 L min. 0.5, 1.25, 2.0 L min. 0.5, 1.25, 2.0 L min. 0.5, 1.25, 2.0 M secs. 0.5, 1.25, 2.0 M secs. 0.5, 1.25, 2.0 M min. 0.5, 1.25, 2.0 M min. 0.5, 1.25, 2.0 Selection of test number depends on current limiting F fire enclosure/spacing of end product Fuse must open before the wiring simulator fuse (MDL 2.0). UL (EN 60950, formerly UL 1950) Impulse Test and Steady-State Electric Strength Test Test Impulse For handheld units Non handheld Steady-State For handheld units Non handheld Voltage (V) Current (A) Waveform x 700ms + 10 w/60 secs. rest x 700ms + 10 w/60 secs. rest Fuse Choices 0.5, 1.25, , 1.25, Hz 0.5, 1.25, Hz 0.5, 1.25, 2.0 Please refer to for current information Series

110 Temperature Introduction Surface to Circuit Mount Protection Fuses 159 Fuse and Transientology Clip Series Soldering Parameters Reflow Condition Product Characteristics Materials Product Marking Insulation Resistance (after opening) Operating Temperature Humidity Test Fuse Body: Ceramic Fuse Caps/Terminals: Silver-plated Brass Clip Base: Gold-plated Clip Terminals: Nickel-plated Brand Logo, Current, 'T' MIL-STD-202, Method 302, Test condition A (10,000 ohms, minimum) -55 C to 125 C with proper rerating 85 C/ 85% RH, 0 hours Pb free assembly - Temperature Min (T s(min) ) 150 C Pre Heat - Temperature Max (T s(max) ) 200 C - Time (Min to Max) (t s ) seconds Average Ramp-up Rate (Liquidus Temp (T L ) to peak) 3 C/second max. T S(max) to T L - Ramp-up Rate 3 C/second max. Reflow - Temperature (T L ) (Liquidus) 217 C - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C Time within 5 C of actual peak Temperature (t p ) seconds Ramp-down Rate 6 C/second max. Time 25 C to peak Temperature (T P ) 8 minutes max. Do not exceed 260 C T P T L T S(max) T S(min) 25 Part Numbering System SERIES AMP Code Refer to Electrical Characteristics table QUANTITY Code M = 0 pcs PACKAGING Code R = Tape and Reel Dimensions Preheat t S time to peak temperature (t 25ºC to peak) M R [0.429] [0.398] LF 1.25 A T Ramp-up 4.80 [0.189] 3.50 [0.138] 3.12 [0.123] t P t L Critical Zone TL to TP Time Ramp-down Example: 0.5 amp product is MR (1.25 amp shown) 3.12 [0.123] Solderability Resistance to Solvents Thermal Shock MIL-STD-202, Method 208/IPC EIA J-STD002A, Test Condition A MIL-STD-202, Method 215 (3 solvent types) MIL-STD-202, Method 107G, Test Condition B3 (95 cycles -65 C to +125 C) 1.70 [0.067] 3.00 [0.118] 4.80 [0.189] 4.00 [0.157] 4.80 [0.189] Mechanical Shock Vibration Moisture Resistance MIL-STD-202, Method 213, Test Condition I (G s peak for 6 msecs.) MIL-STD-202, Method 201, (10-55 Hz) MIL-STD-202, Methold 106, High Humidity (90-98% RH), Heat (65 C) "A" 4.90 [0.193].004 "B" Recommended Pad Layout Salt Spray/ Atmosphere MIL-STD-202F, Method 101, Test Condition B (48 hours) 4.40 [0.173] 3.88 [0.153] Terminal Attachment MIL-STD-202, Method 211, Test Condition A, 5 lbs applied to end caps 4.30 [0.169] [0.512] Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 24mm Tape and Reel EIA RS (IEC 286, part 3) 0 MR 159 Series 106 Please refer to for current information.

111 Surface Mount Fuses PICO SMF Fuse > 459 Series 459 Series PICO Very Fast-Acting Surface Mount Fuse Description The 459 Series Very Fast-Acting SMF is based on Littelfuse PICO fuse technology, though offered in a surface mount package. This series of devices meets the requirements of the RoHS directive. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E mA - 5A 459 Series LR29862 Electrical Characteristics for Series 62mA - 5A Applications % of Ampere Opening Time % 4 hours, Minimum 200% 1 second, Maximum 300% 0.1 second, Maximum Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x VAC x x VDC x x x x x x x x x x x x x x Please refer to for current information. 107 Revised: August 4, Series

112 Introduction Surface to Circuit Mount Protection Fuses PICO SMF Fuse Transientology > 459 Series Temperature Rerating Curve Average Time Current Curves.062A.125A.25A.375A.500A.750A 1A 1.5A 2A 2.5A 3A 3.5A 4A 5A 10 TIME IN SECONDS Note: 1. Rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation CURRENT IN AMPERES Soldering Parameters Wave Soldering Reflow Soldering 260 C, 10 seconds max. 260 C, 30 seconds max. 459 Series 108 Please refer to for current information.

113 Surface Mount Fuses PICO SMF Fuse > 459 Series Product Characteristics Body: Molded Thermoplastic Materials Terminations: % Tin-plated Copper (459 Series) Solderability MIL-STD-202, Method 208 Product Marking Moisture Sensitivity Level Dimensions 5 A V LF B (.285") REF. 1.30(.051") REF (.170") 3.05 (.120") Body: Brand Logo, Current, Voltage, Series Code, Date Code, Agency Approved Logo Level 1 J-STD - 020C 2.03 (.080") 1.65 (.065") 8.26 (.325") 2.97 (.117") 4.95 (.195") RECOMMENDED PAD LAYOUT Operating Temperature Shock Vibration Salt Spray Insulation Resistance (After Opening) Thermal Shock Moisture Resistance Part Numbering System SERIES AMP Code Refer to Electrical Characteristics table QUANTITY Code UR = 500 pcs ER = 2500 pcs PACKAGING Code R = Tape and Reel 55 O C to 125 O C MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 msecs.) MIL-STD-202, Method 201 (10 55 Hz, 0.06 inch total excursion) MIL-STD-202, Method 101, Test Condition B (48 hours) MIL-STD-202, Method 302, (10,000 ohms minimum at volts) MIL-STD-202, Method 107, Test Condition B ( 65 to 125 C) MIL-STD-202, Method 106, High Humidity (90-98 RH), Heat (65 C) UR Example: 0.62 Amp product is UR (.5 Amp product shown above). 459 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 12mm Tape and Reel EIA RS (IEC 286, part 3) 500 UR 12mm Tape and Reel EIA RS (IEC 286, part 3) 2500 ER Please refer to for current information Series

114 Introduction to Circuit Protection Transientology 110

115 Surface Mount Fuses PICO SMF Fuse > 460 Series 460 Series PICO Slo-Blo Surface Mount Fuse PS E Description The 460 Series Slo-Blo SMF is based on Littelfuse PICO fuse through-hole technology, though offered in a surface mount package. This series of devices meets the requirements of the RoHS directive. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E A - 5A 460 Series LR A - 5A PS E NBK E A - 5A Electrical Characteristics for Series % of Ampere Opening Time % 4 hours, Minimum 200% 1 second, Min.; 120 seconds, Max. 300% 0.2 second, Min.; 3 seconds, Max. 800% 0.02 second, Min.; 0.1 second, Max. Applications Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x VAC x x x x x x VDC x x x x x x x x x x x x x x x PS E Please refer to for current information. 111 Revised: August 4, Series

116 Introduction Surface to Circuit Mount Protection Fuses PICO SMF Fuse Transientology > 460 Series Temperature Rerating Curve Average Time Current Curves 0.375A.500A.750A 1A 1.5A 2A 2.5A 3A 3.5A 4A 5A TIME IN SECONDS 10 1 Note: 1. Rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation CURRENT IN AMPERES 0 Soldering Parameters Wave Soldering Reflow Soldering 260 C, 3 seconds max. 230 C, 30 seconds max. 460 Series 112 Please refer to for current information.

117 Surface Mount Fuses PICO SMF Fuse > 460 Series Product Characteristics Body: Molded Thermoplastic Materials Terminations: % Tin-plated Copper (460 Series) Solderability MIL-STD-202, Method 208 Product Marking Moisture Sensitivity Level Dimensions 5 A V LF B (.285") REF. 1.30(.051") REF (.170") 3.05 (.120") Body: Brand Logo, Current, Voltage, Series Code, Date Code, Agency Approved Logo Level 1 J-STD - 020C 2.03 (.080") 1.65 (.065") 8.26 (.325") 2.97 (.117") 4.95 (.195") RECOMMENDED PAD LAYOUT Operating Temperature 55 C to 125 C Shock Vibration Salt Spray Insulation Resistance (After Opening) Thermal Shock Moisture Resistance Part Numbering System SERIES AMP CODE Refer to Electrical Characteristics table QUANTITY CODE UR = 500 pcs ER = 2500 pcs PACKAGING CODE R = Tape and Reel MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 msecs.) MIL-STD-202, Method 201 (10 55 Hz, 0.06 inch total excursion) MIL-STD-202, Method 101, Test Condition B (48 hours) MIL-STD-202, Method 302, (10,000 ohms minimum at volts) MIL-STD-202, Method 107, Test Condition B ( 65 C to 125 C) MIL-STD-202, Method 106, High Humidity (90-98 RH), Heat (65 C) UR Example: 1 Amp product is UR (.5 Amp product shown above). 460 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 12mm Tape and Reel EIA RS (IEC 286, part 3) 500 UR 12mm Tape and Reel EIA RS (IEC 286, part 3) 2500 ER Please refer to for current information Series

118 Introduction to Circuit Protection Transientology 114

119 Surface Mount Fuses FLAT-PAK Fast-Acting Fuse > 202 Series 202 Series Fuse Description Fast-Acting and Slo-Blo Fuse versions of the Flat-Pak Fuse designs are available. Both designs are available in either a gull-wing surface mount package or a DIP configuration for through-hole mounting. These fuse designs feature a 250 VAC rating in a low profile, rectangular package. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE 202 Series E /16mA - 5A LR /16mA - 5A Electrical Characteristics for Series % of Ampere Opening Time % 4 hours, Minimum 200% 2 seconds, Maximum Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x amperes x x VAC x x x x x x x x x x x x Please refer to for current information. 115 Revised: Mar 17, Series

120 Introduction Surface to Circuit Mount Protection Fuses FLAT-PAK Fast-Acting Fuse Transientology > 202 Series Temperature Rerating Curve Average Time Current Curves 1/16A 1/8A 1/4A 1/2A 3/4A 1A 1 1/2A 2A 2 1/2A 3A 4A 5A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPERES 0 Soldering Parameters Wave Soldering 260 C, 3 seconds max. Reflow Soldering 215 C, 30 seconds max. 202 Series 116 Please refer to for current information.

121 Surface Mount Fuses FLAT-PAK Fast-Acting Fuse > 202 Series Product Characteristics Materials Body: Thermoplastic Terminations: Tin/Lead Plated Copper Solderability MIL-STD-202, Method 208. Cleaning Operating Temperature Board washable in most common solvents. 55 O C to 125 O C Dimensions Part Numbering System 202 FLAT- PAK LF F 2A 250 V PAT (.372") 6.35 (.250") 202GFLAT- PAK LF F 2A 250 V PAT (.372") 6.35 (.250") Surface Mount Fuses: HXG Through Hole Fuses: H.135" 6 o (.400") 0.30 (.012") DIP Configuration (Thru-Hole) Mounting 4.19 (.165") 0.08 (.003") 1.40 (.055") (.600") (.021") SMF Configuration ("Gull Wing" Surface Mount) (.674) 4.06 (.160) 1.52 (.060") 4.19 (.165") Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code HXG = URG = 500 Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code H = 202 Series 2.79 (.110) (.454) Recommended Pad Layout Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Surface Mount Fuses Bulk HXG 24mm Tape and Reel EIA RS (IEC 286, part 3) 500 URG Through Hole Fuses Antistatic Magazine H Please refer to for current information Series

122 Introduction to Circuit Protection Transientology 118

123 Surface Mount Fuses FLAT-PAK Slo-Blo Fuse > 203 Series 203 Series Fuse Description Fast-Acting and Slo-Blo Fuse versions of the Flat-Pak Fuse designs are available. Both designs are available in either a gull-wing surface mount package or a DIP configuration for through-hole mounting. These fuse designs feature a 250 VAC rating in a low profile, rectangular package. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE 203 Series E /4mA - 5A LR /4mA - 5A Electrical Characteristics for Series % of Ampere Opening Time % 4 hours, Minimum 200% 1 second, Min; 30 seconds Max. Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x amperes x x VAC x x x x x x x x x x Please refer to for current information. 119 Revised: Mar 17, Series

124 Introduction Surface to Circuit Mount Protection Fuses FLAT-PAK Slo-Blo Fuse Transientology > 203 Series Temperature Rerating Curve Average Time Current Curves 1/4A 1/2A 3/4A 1A 1 1/2A 2 A 2 1/2A 3A 4A 5A 10 TIME IN SECONDS 1.1 Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPERES 0 Soldering Parameters Wave Soldering 260 C, 3 seconds max. Reflow Soldering 215 C, 30 seconds max. 203 Series 120 Please refer to for current information.

125 Surface Mount Fuses FLAT-PAK Slo-Blo Fuse > 203 Series Product Characteristics Materials Body: Thermoplastic Terminations: Tin/Lead Plated Copper Solderability MIL-STD-202, Method 208 Cleaning Operating Temperature Board washable in most common solvents 55 O C to 125 O C Dimensions Part Numbering System.135" 6 o 202 FLAT- PAK LF F 2A 250 V PAT (.372") 6.35 (.250") (.400") 0.30 (.012") DIP Configuration (Thru-Hole) Mounting 4.19 (.165") 202GFLAT- PAK LF F 2A 250 V PAT (.372") 6.35 (.250") 0.08 (.003") 1.40 (.055") (.600") (.021") SMF Configuration ("Gull Wing" Surface Mount) (.674) 1.52 (.060") 4.19 (.165") Surface Mount Fuses: HXG Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code HXG = URG = 500 Through Hole Fuses: H Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code H = 203 Series 4.06 (.160) 2.79 (.110) (.454) Recommended Pad Layout Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Surface Mount Fuses Bulk HXG 24mm Tape and Reel EIA RS (IEC 286, part 3) 500 URG Through Hole Fuses Antistatic Magazine H Please refer to for current information Series

126 Introduction to Circuit Protection Transientology 122

127 Surface Mount Fuses EBF Fuse Fast-Acting > 446/447 Series 446/447 Series Fuse Description Agency Approvals AGENCY AGENCY FILE NUMBER E71611 LR Series (surface mount leads) 447 Series (thru-hole leads) AMPERE RANGE 2A - 10A 2A - 10A The 446/447 series are circuit-board mountable, flat profile, fast-acting fuses designed for protection of electronic ballasts and power inverter applications. The 446 series is designed with leads for surface mount applications, and the 447 series is designed with leads for through-hole applications. This series of devices are % lead-free and meets the requirements of the RoHS directive. Features % lead-free electronic lighting ballast, power supply and power inverter applications. 250, 277 and 350 VAC circuits. reliability of the automotive MINI Fuse; available from 2 through 10 amperes. 446/447 Series Electrical Characteristics for Series % of Ampere Opening Time % 4 hours, Minimum 200% 0.15 sec. Min.; 5 sec. Max. Electrical Specifications by Item Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x VAC, 50 amperes x x VDC and x x x x x x Please refer to or /447.html for current information. 123 Revised: February 24, P/447P Series

128 Introduction Surface to Circuit Mount Protection Fuses EBF Fuse Fast-Acting > 446/447 Transientology Series Temperature Rerating Curve Average Time Current Curves 0 2A 3A 4A 5A 7 1/2A 10A TIME IN SECONDS 10 1 Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPERES 0 Soldering Parameters 446 Series: Reflow Solder 235 C, 5 seconds maximum. No-clean process recommended. Wave Solder Not recommended. Non-plated terminal surfaces may not meet MIL-STD-202, Method Series: Contact Littelfuse for soldering parameters. Inside terminal face of each lead is non-plated zinc. Non-plated zinc terminal faces may not meet MIL-STD-202, method 208. To ensure that the fuse is acceptable for the application, appropriate application testing should be performed. 446P/447P Series 124 Please refer to or /447.html for current information.

129 Surface Mount Fuses EBF Fuse Fast-Acting > 446/447 Series Product Characteristics Materials Body: Plastic Body Terminations: Tin-load (95/5) plated Zn, Ni barrier Operating Temperature 40 O C to 125 O C Cleaning No-cleaning process recommended Dimensions Part Numbering System Reference Dimensions (Inches) Recommended Pad Layout 447 Mounting Holes LF 350V (.430") PATA (.150") 1.52 (.060") 1.44 (.057") 8.76 (.345") 5.91 (.233") 8.81 (.347") 4.03 (.159") 1.27 (.050") Dia (.398") Series Amp Code Quantity Code ZRP = ZRP Series Amp Code Quantity Code YXP = YXP 446/447 Series 1.50 (.059") MAX (.126") (.220") 3.2 (.126") (.295") 7.49 (.032") (.032") For 447 dimensions, please contact Littelfuse for specifications. Packaging 446 Series Packaging Option Packaging Specification Quantity Quantity & Packaging Code 447 Series 24mm Tape and Reel EIA RS (IEC 286, part 3) 800 ZRP Bulk Pack 4000 YXP Please refer to or /447.html for current information P/447P Series

130 Introduction to Circuit Protection Transientology 126

131 Radial Lead Fuses MICRO > Very Fast-Acting > 262/268/269 Series 262/268/269 Series, MICRO Very Fast-Acting Fuse (High-Reliability) QPL Description The 262/268/269 Series are high reliability micro fuses, with a 125V rating, very fast-acting type with high breaking capacity. This series is listed under the Department of Defense Quality Product List. Features ampere of 2mA to 5A radial leaded Agency Approvals Agency Agency File Number Ampere Range E mA - 5A LR mA - 5A Applications Protection of electrical, electronic, and communication equipment having printed circuit boards (PCBs) usable in direct current (DC) and alternating current (AC) (up to 400 hertz (Hz)) circuits capable of withstanding and functioning in extreme conditions found in Spacecraft or Military applications as described in MIL-PRF QPL FM07A 2mA - 5A Electrical Characteristics % of Ampere Ampere Opening Time % 1/ Hours, Min. 200% 1/500 3/10 5 Seconds, Max. 4/ Seconds, Max. 262/268/269 Electrical Characteristics Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Agency Approvals X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X ,000 amperes at 1.25 X X X VAC/VDC X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Please contact Littelfuse for Average Time Current Curve. QPL Please refer to /268.html or /269.html for current information. 127 Revised: Jan 12, /268/269 Series

132 Introduction to Radial Circuit Lead Protection Fuses MICRO > Very Fast-Acting > 262/268/269 Transientology Series Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Temperature Rerating Curve Please contact Littelfuse for average time current curve. 262/268/269 Series 128 Please refer to /268.html or /269.html for current information.

133 Radial Lead Fuses MICRO > Very Fast-Acting > 262/268/269 Series Product Characteristics Materials Weight Lead Pull Force AQL (Electrical Characteristics) Sampling Traceability and Identification Records Options Product Marking Dimensions Gold-Plated Copper Leads, Type II (Fuse cap is also Gold-Plated) 262 and 269 Series.36 Grams; 268 Series.48 Grams MIL-STD-202, Method 211, Test Condition A (will withstand a 5 lb. axial pull test) Certified to 1% AQL Per MIL-STD-105, Inspection Level II Controlled by lot number and retained on file for a minimum of three years. Copies of Lot Certification Test data available when requested with order Special screening tests, burn-in, etc. can be supplied on special order to meet specific requirements 262 / 268 Series: Brand logo, current and voltage ratings 269 Series: Brand logo, current and voltage ratings and agency approval mark Series Series 7.37 (.29") 4.32 (.17") 2.54 (.10") 5.97 (.235") 7.37 (.29") 25.4 (1.0") 2.54 (.10") Operating Temperature Shock Vibration Salt Spray Seal Test Insulation Resistance (After Opening) 55ºC to +125ºC (1/500): MIL-STD-202, Method 213, Test Condition A (50 G s peak for 11 milliseconds). (1/200 5): MIL- STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) MIL-STD-202, Method 201 (10 55 Hz); MIL-STD-202, Method 204, Test Condition C ( Hz at 10 G s Peak) MIL-STD-202, Method 101, Test Condition B MIL-STD-202, Method 112, Test Condition A MIL-STD-202, Method 302, Test Condition A (1/2 Megohm minimum) Thermal Shock MIL-STD-202, Method 107, Test Condition B ( 65ºC to 125ºC) Moisture Resistance MIL-STD-202, Method 106 Fuses to MIL SPEC Part Numbering System Series 262 Series is available in FM07A on QPL for MIL-PRF-23419/7. To order, change 262 to xxxx V Amp. Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code V = 5 262/268/269 Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Bulk N / A 5 V Please refer to /268.html or /269.html for current information /268/269 Series

134 Introduction to Circuit Protection Transientology 130

135 Radial Lead Fuses MICRO > Very Fast-Acting > 272/273/274/278/279 Series 272/273/274/278/279 Series, MICRO Very Fast-Acting Fuse QPL Description Developed originally for the U.S. Space Program, MICRO fuse provides reliability in a compact design. The MICRO fuse is available in plug in or radial lead styles and a complete range of ampere ratings from 1/500 to 5A to suit a wide variety of design needs. Features Agency Approvals Agency Agency File Number Ampere Range E mA - 5A Military grade available High breaking capacity Clear cover option to view fuse element status Applications Printed circuit boards and similar equipment Available from very low ampere of 2mA to 5A Plug-in with short or long leads option Electronic components LR mA - 5A QPL FM02 2mA - 5A Electrical Characteristics % of Ampere Ampere Opening Time % 1/ Hours, Min. 200% 1/500 3/10 5 Seconds, Max. 4/ Seconds, Max /278-9 Electrical Characteristics Ampere (A) Amp Code (for all above series) Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X ,000 amperes at X X X VAC/VDC X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X QPL Please refer to /273.html, /274.html, /278.html or /279.html for current information. 131 Revised: Jan 12, /273/274/278/279 Series

136 Introduction to Radial Circuit Lead Protection Fuses MICRO > Very Fast-Acting > 272/273/274/278/279 Transientology Series Temperature Rerating Curve Average Time Current Curves 1/200 A 1/ A 1/64 A 1/32 A 1/16 A 1/8 A 1/4 A 1/2 A 3/4 A 1 A 1 1/2 A 2 A 3 A 4 A 5 A 10 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 272/273/274/278/279 Series 132 Please refer to /273.html, /274.html, /278.html or /279.html for current information.

137 Radial Lead Fuses MICRO > Very Fast-Acting > 272/273/274/278/279 Series Product Characteristics Dimensions Operating Temperature: 273 and 279: 55ºC to +85ºC; 272 and 278: 55ºC to +125ºC Series (Short Lead, Metal Cap) Fuses to MIL SPEC 273 Series is available in CSA LR Military QPL type (FM02). To order, change 273 to (.235") 7.30 (.29") 4.32 (.17") 2.54 (.10") Materials 272 and 278 series cap: Nickel Plated Brass 273, 274 and 279 series cap: Mirror polished Polycarbonate Base: R-4 Ryton Pins: Tin Plated Copper Series (Long Lead, Metal Cap) 5.97 (.235") 7.30 (.29") 25.4 (1.0") Product Marking Current and voltage ratings stamped on cap 2.54 (.10") Part Numbering System Series 0273 xxxx V and Series (Short Lead, Clear Plastic Cap) 6.35 (.25") 8.89 (.35") 4.32 (.17") 2.54 (.10") Amp. Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code V = 5 H = Series (Long Lead, Clear Plastic Cap) 6.35 (.25") 8.89 (.35") 25.4 (1.0") 2.54 (.10") 272-4/278-9 NOTE: Amperage and voltage rating stamped on cap. Leads are tin plated copper;.025" diameter. Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Bulk N / A 5 V Bulk N / A H Please refer to /273.html, /274.html, /278.html or /279.html for current information /273/274/278/279 Series

138 Introduction to Circuit Protection Transientology 134

139 Radial Lead Fuses TR3 > Fast-Acting > 303 Series 303 Series, TR3, Fast-Acting Fuse Description The 303 Series are TR3, fast-acting type, 125V rated fuses designed in accordance to UL Features Agency Approvals Agency Agency File Number Ampere Range requirements plug-in versions approved to 5A E mA-5A Electrical Characteristics % of Ampere mA-5A Opening Time Seconds, Maximum Applications 303 Series Electrical Characteristics Amp Code Rated Current Voltage Breaking Capacity Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.0 x I N max. (mw) Melting Integral 10 x I N max. (A 2 s) Approvals mA 125V X X mA 125V X X mA 125V X X 0 ma 125V X X mA 125V X X mA 125V X X mA 125V X X mA 125V X X mA 125V X X mA 125V 50A / 125VAC X X Hz/cos ϕ mA 125V X X mA 125V 50A / 63 VDC X X mA 125V X X A 125V X X A 125V X X A 125V X X A 125V X X A 125V X X A 125V X X A 125V X X A 125V X X Please refer to for current information. 135 Revised: Jan 12, Series

140 Introduction to Radial Circuit Lead Protection Fuses TR3 > Fast-Acting Transientology > 303 Series Temperature Rerating Curve Average Time Current Curves PERCENT OF RATING C,000 10,000 1,000 TR3 / No. 303 I-t Characteristics (Min-Max Limit) UL Test value AMBIENT TEMPERATURE ( C) Time (sec.) I Fault / I Rated 15 Contact Littelfuse for individual I-t curves Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 303 Series 136 Please refer to for current information.

141 Radial Lead Fuses TR3 > Fast-Acting > 303 Series Product Characteristics Materials Base/Cap: Black Thermoplastic Base Polyamide PA 6.6, UL 94V-0 Brass, Nickel-plated Cap Round Pins: Copper alloy, Tin plated Lead Pull Strength 10 N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -25ºC to +70ºC (consider de-rating) -25ºC/+70ºC/21 days (EN ) +10ºC to +60ºC RH, 75% yearly average, without dew 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10 g acceleration Dimensions Part Numbering System Ø 6 L max. 8 2,54 Ø 0,6 1 +0,1 Dimensions (mm) Holes in PCB Long Leads (L=18.8 mm) Short Leads (L=4.3 mm) 303 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Reel Size 303 Series Tape & Ammopack N/A 1, N/A Short Leads N/A N/A Short Leads N/A N/A Please refer to for current information Series

142 Introduction to Circuit Protection Transientology 138

143 Radial Lead Fuses TR5 > Fast-Acting > 370 Series 370 Series, TR5, Fast-Acting Fuse Description The 370 Series are TR5,sub-miniature,fast-acting type, 250V rated fuses, designed in accordance to IEC Features Agency Approvals Agency Agency File Number Ampere Range requirements plug-in versions approved to 6.3A License number: /82438 License number: / / /82443 Certificate number: 755 File number: E67006 JET ma - 5A 40mA 50mA - 80mA 6.3A 50mA - 6.3A 40mA - 6.3A 1A - 5A Applications 370 Series mA - 5A Electrical Characteristics % of Ampere Opening Time 150% 1 Hour, Min. 210% 30 Minutes, Max. 275% 10 ms, Min. ; 3 Sec., Max. 400% 3 ms, Min. ; 300 ms, Max. 0% 20 ms, Max. Please refer to for current information. 139 Revised: May 6, Series

144 Introduction to Radial Circuit Radial Lead Protection Fuses Lead TR5 > Fast-Acting Transientology > 370 Series Electrical Characteristics Amp Code Rated Current Voltage Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.5 x I N max. (mw) Melting Integral 10 x I N max. (A 2 s) Agency Approvals mA 250V G X mA 250V X X X X mA 250V X X X X mA 250V X X X X 0 ma 250V X X X X mA 250V X X X X mA 250V X X X X mA 250V X X X X mA 250V X X X X mA 250V 35 A/ 250VAC X X X X mA 250V Hz cos ϕ = X X X X mA 250V X X X X mA 250V X X X X mA 250V X X X X A 250V X X X X X A 250V X X X X X A 250V X X X X X A 250V X X X X X A 250V X X X X X A 250V X X X X X A 250V 40 A / 250 VAC X X X X X A 250V X X X X X 50 A / 250 VAC A* 250V G X X 1 Per UL, approved breaking capacity is 50 A at 250 V. * Conducting path min. 0.2 mm 2 G = Expert Report pending Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Temperature Rerating Curve Average Time Current Curves A 0.050A 0.063A 0.080A 0.A 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 5.00A 6.30A PERCENT OF RATING C AMBIENT TEMPERATURE ( C) TIME IN SECONDS CURRENT IN AMPERES 370 Series 140 Please refer to for current information.

145 Radial Lead Fuses TR5 > Fast-Acting > 370 Series Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Preheat Time Dwell Time Cooling Time Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Lead-Free Recommendation (Typical Industry Recommendation) Temperature Minimum: C Temperature Maximum: 150 C Preheat Time: Seconds Solder Pot Temperature: 260 C Maximum Solder Dwell Time: 2-5 Seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94 V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC to +85ºC/21 days (IEC ,-2-1,-2-2,-2-78) +10ºC to +60ºC RH 75% yearly average, without dew, maximum value for 30 days- 95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10G acceleration 370 Series Please refer to for current information Series

146 Introduction to Radial Circuit Radial Lead Protection Fuses Lead TR5 > Fast-Acting Transientology > 370 Series Dimensions Part Numbering System xxxx 0000 max. 8 L min Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,000 pcs.) 0410 Short Leads - Bulk (1,000 pcs.) Holes in PCB Long Leads (L=18.8mm) Short Leads (L=4.3mm) Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 370 Series Tape & Ammopack N/A 1, N/A Short Leads N/A 1, N/A 370 Series 142 Please refer to for current information.

147 Radial Lead Fuses TR5 > Time-Lag > 372 Series 372 Series, TR5, Time-Lag Fuse Description The 372 Series are TR5, time-lag type, 250V rated fuses, that are designed in accordance to IEC Features Agency Approvals requirements plug-in versions approved to 6.3A Agency Agency File Number Ampere Range / mA - 4A / A - 6.3A JET A - 5A mA - 6.3A E mA - 6.3A SU SU SU SU SU SU SU mA - ma 125mA - 800mA 1A - 2.5A 3.15A 4A 5A 6.3A CQC A - 6.3A Applications Electrical Characteristics % of Ampere Opening Time 150% 1 Hour, Min. 210% 2 Minutes, Max. 275% 400 ms, Min. ; 10 Sec., Max. 400% 150 ms, Min. ; 3 Sec., Max. 0% 20 ms, Min. ; 150 ms, Max. 372 Series mA - 4A Please refer to for current information. 143 Revised: June 3, Series

148 Introduction to Radial Circuit Lead Protection Fuses TR5 > Time-Lag Transientology > 372 Series Electrical Characteristics Amp Code Rated Current Voltage Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.5 x I N max. (mw) Melting Integral 10 x I N min. (A 2 s) Agency Approvals mA 250V X mA 250V X X X X X mA 250V X X X X X mA 250V X X X X X 0 ma 250V X X X X X mA 250V X X X X X mA 250V X X X X X mA 250V X X X X X mA 250V X X X X X mA 250V 35A/250VAC X X X X X mA 250V Hz cos ϕ = X X X X X mA 250V X X X X X mA 250V X X X X X mA 250V X X X X X A 250V X X X X X X A 250V X X X X X X A 250V X X X X X X A 250V X X X X X X A 250V X X X X X X A 250V X X X X X X A 250V 40A / 250 VAC X X X X X X A 250V G X X X CQC X A * 250V 50A / 250 VAC G X X CQC X 1 Per UL, approved breaking capacity is 50 A at 250 V. * Conducting path min. 0.2 mm 2 G = Expert Report Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Temperature Rerating Curve Average Time Current Curves A 0.050A 0.063A 0.080A 0.A 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 5.00A 6.30A PERCENT OF RATING C AMBIENT TEMPERATURE ( C) TIME IN SECONDS CURRENT IN AMPERES 372 Series 144 Please refer to for current information.

149 Radial Lead Fuses TR5 > Time-Lag > 372 Series Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94 V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC/+85ºC/21 days (IEC ,-2-1,-2-2,-2-78) +10ºC to +60ºC RH 75% yearly average, without dew, maximum value for 30 days- 95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10G s acceleration 372 Series Please refer to for current information Series

150 Introduction to Radial Circuit Lead Protection Fuses TR5 > Time-Lag Transientology > 372 Series Dimensions Part Numbering System xxxx 0001 max. 8 Series L min Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0001 Tape/Ammopack (1,000 pcs.) 0411 Short Leads - Bulk (1,000 pcs.) 0431 Short Leads - Bulk (200 pcs.) mm Leads - Bulk (0 pcs.) Long Leads (L=18.8mm) Short Leads (L=4.3mm) Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 372 Series Tape & Ammopack N/A 1, N/A Short Leads N/A 1, N/A Short Leads N/A N/A 3.3mm Leads N/A 1, N/A 372 Series 146 Please refer to for current information.

151 Radial Lead Fuses TR5 > Fast-Acting > 373 Series 373 Series, TR5, Fast-Acting Fuse Description The TR5 373 Series are fast acting 250V rated fuses, that are designed in accordance to UL Features Agency Approvals Agency Agency File Number Ampere Range File number: E mA - 6.3A Certification: mA - 6.3A File number: E A - 10A Electrical Characteristics % of Ampere 200% Ampere 50mA - 6.3A 8A - 10A Opening Time 5 Seconds, Max. 60 Seconds, Max. requirements plug-in versions approved resistance Applications to 10A 373 Series Electrical Characteristics Amp Code Rated Current Voltage Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.0 x I N max. (mw) Melting Integral 10 x I N max. (A 2 s) Agency Approvals mA 250V X X mA 250V X X mA 250V X X 0 ma 250V X X mA 250V X X mA 250V X X mA 250V X X mA 250V X X mA 250V X X mA 250V X X mA 250V 50A / 250 VAC X X mA 250V X X Hz mA 250V X X cos ϕ = A 250V X X A 250V X X A 250V X X A 250V X X A 250V X X A 250V X X A 250V X X A 250V X X A 250V X X A 1 250V X A 1 250V X 1. Conducting path cross-section minimum 0.2mm 2 Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. 147 Revised: May 6, 2009 Please refer to for current information. 373 Series

152 Introduction to Radial Circuit Lead Protection Fuses TR5 > Fast-Acting Transientology > 373 Series Temperature Rerating Curve Average Time Current Curves A 0.063A 0.080A 0.A 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 5.00A 6.30A 8.00A 10.00A PERCENT OF RATING C AMBIENT TEMPERATURE ( C) TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Preheat Time Dwell Time Cooling Time Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 373 Series 148 Please refer to for current information.

153 Radial Lead Fuses TR5 > Fast-Acting > 373 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94 V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC/+85ºC/21 days (EN ,-2-1,-2-2,-2-78) +10ºC to +60ºC RH 75% yearly average, without dew, maximum value for 30 days- 95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10G s acceleration Dimensions 8.5 Part Numbering System 373 xxxx 0000 max. 8 L min Holes in PCB Long Leads (L=18.8mm) Short Leads (L=4.3mm) Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,000 pcs.) 0410 Short Leads - Bulk (1,000 pcs.) 0430 Short Leads - Bulk (200 pcs.) 373 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 373 Series Tape & Ammopack N/A 1, N/A Short Leads N/A 1, N/A Short Leads N/A N/A Please refer to for current information Series

154 Introduction to Circuit Protection Transientology 150

155 Radial Lead Fuses TR5 > Time Lag > 374 Series 374 Series, TR5, Time-Lag Fuse Description The TR5 374 Series are time Lag 250V rated fuses, that are designed in accordance to UL Features Agency Approvals requirements plug in versions approved to 10A Agency Agency File Number Ampere Range File number: E Certification: File number: E mA - 6.3A 50mA - 6.3A 8A - 10A Applications Electrical Characteristics % of Ampere Opening Time 200% 60 Seconds, Max. 374 Series Please refer to for current information. 151 Revised: May 6, Series

156 Introduction to Radial Circuit Lead Protection Fuses TR5 > Time Lag Transientology > 374 Series Electrical Characteristics Amp Code Rated Current Voltage Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.0 x I N max. (mw) Melting Integral 10 x I N min. (A 2 s) Agency Approvals mA 250V x x mA 250V x x mA 250V x x 0 ma 250V x x mA 250V x x mA 250V x x mA 250V x x mA 250V x x mA 250V x x mA 250V x x mA 250V x x mA 250V 50 A / 250 VAC x x Hz mA 250V cos ϕ = x x A 250V x x A 250V x x A 250V x x A 250V x x A 250V x x A 250V x x A 250V x x A 250V x x A 250V x x A 1 250V x A 1 250V x Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Temperature De- Curve Average Time Current Curves A 0.063A 0.080A 0.A 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 5.00A 6.30A 8.00A 10.00A 00 0 TIME IN SECONDS CURRENT IN AMPERES 374 Series 152 Please refer to for current information.

157 Radial Lead Fuses TR5 > Time Lag > 374 Series Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Preheat Time Dwell Time Cooling Time Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94 V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC/+85ºC/21 days (EN ,-2-1,-2-2,-2-78) +10ºC to +60ºC RH 75% yearly average, without dew, maximum value for 30 days- 95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10G s acceleration 374 Series Dimensions Part Numbering System xxxx 0000 max. 8 L Holes in PCB 0.5 min Long Leads (L=18.8mm) Short Leads (L=4.3mm) Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,000 pcs.) 0410 Short Leads - Bulk (1,000 pcs.) 0430 Short Leads - Bulk (200 pcs.) Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 374 Series Tape & Ammopack N/A 1, N/A Short Leads N/A 1, N/A Short Leads N/A N/A Please refer to for current information Series

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159 Radial Lead Fuses TR5 > Time-Lag > 382 Series 382 Series, TR5, Time-Lag Fuse Description The 382 Series are TR5, time-lag type, 250V rated fuses, with enhanced breaking capacity designed in accordance to IEC Features Agency Approvals Agency Agency File Number Ampere Range / A - 4A Liscense number: /82571 Certification: File number: E JET JET A - 6.3A 1A - 6.3A 1A - 10A 1A - 10A A - 4A CQC A - 6.3A SU SU SU SU SU A - 6.3A requirements plug-in versions approved Applications Electrical Characteristics 10A % of Opening Time Ampere 1A - 6.3A 8A - 10A 150% 1 Hour, Min. 1 Hour, Min. 210% 2 Minutes, Max. 300 s, Max. 275% 400% 400 ms, Min. ; 10 Sec., Max. 150 ms, Min. ; 3 Sec., Max. 1 s, Min. ; 20 s, Max. 150 ms, Min. ; 3 Sec., Max. 0% 20 ms, Min. ; 150 ms, Max. 20 ms, Min. ; 150 ms, Max. 382 Series Please refer to for current information. 155 Revised: May 6, Series

160 Introduction to Radial Circuit Lead Protection Fuses TR5 > Time-Lag Transientology > 382 Series Electrical Characteristics Amp Code Rated Current Voltage A 250 V Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.5 x I N max. (mw) Melting Integral 10 x I N min. (A 2 s) Agency Approvals X X X X X X A 250 V X X X X X X A 250 V X X X X X X A 250 V X X X X X X A 250 V A / X X X X X X A 250 V 250VAC Hz X X X X X X A 250 V cos ϕ = X X X X X X A 250 V G X X X QCC X A 250 V G X X X CQC X A 250 V X X A 250 V X X Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Temperature Rerating Curve Average Time Current Curves A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 5.00A 6.30A 8.00A 10.00A 00 0 TIME IN SECONDS CURRENT IN AMPERES 382 Series 156 Please refer to for current information.

161 Radial Lead Fuses TR5 > Time-Lag > 382 Series Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94 V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC to +85ºC /21 days (EN ,-2-1,-2-2,-2-78) +10ºC to +60ºC RH 75% yearly average, without dew, maximum value for 30 days 95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10 g acceleration 382 Series Dimensions 8.5 Part Numbering System 382 xxxx 0000 max. 8 L min Long Leads (L=18.8mm) Short Leads (L=4.3mm) Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,000 pcs.) 0410 Short Leads - Bulk (1,000 pcs.) 0430 Short Leads - Bulk (200 pcs.) Packaging Holes in PCB Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 382 Series Tape & Ammopack N/A 1, N/A Short Leads N/A 1, N/A Short Leads N/A N/A Please refer to for current information Series

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163 Radial Lead Fuses TR5 > Time-Lag > 383 Series 383 Series, TR5, Time-Lag Fuse Description TR5 Features Agency Approvals Agency Agency File Number Ampere Range Lead-free Applications / A - 5A JET JET E67006 Electrical Characteristics for Series 1A - 5A 6.3A - 10A 1A - 10A Electrical Characteristics for Series 383 Series % of Ampere 150% Opening Time (1A-6.3A) 1 Hour, Minimum % of Ampere % Opening Time (8A-10A) 210% 120 sec., Maximum % 275% 400 ms., Min.; 10 sec., Max. % 400% 150 ms., Min.; 3 sec., Max. % 0% 20 ms., Min.; 150 ms., Max. Electrical Characteristics Specifications by Item Amp Code Amp (A) Max Voltage (V) Breaking Capacity 50-60Hz/cos =1 Voltage Drop 1.0 x 1N max. (mv) Power Dissipation 1.5 x 1N max. (mw) Melting Integral 10 x 1N min. (A 2 s) Agency Approvals A@300VAC 50A@300VAC 50A@300VAC X X X X X X X X X X X X X X X X X X X X X Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Please refer to for current information. 159 Revised: May 6, Series

164 10A 8A 6.3A 5A 4A 3.15A 2.5A 2A 1.6A 1.25A 1A Introduction to Radial Circuit Lead Protection Fuses TR5 > Time-Lag Transientology > 383 Series Temperature Rerating Curve Average Time Current Curves PERCENT OF RATING C C -20 C 0 C 20 C 40 C 60 C 80 C AMBIENT TEMPERATURE TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 383 Series 160 Please refer to for current information.

165 Radial Lead Fuses TR5 > Time-Lag > 383 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA6.6, UL 94 V0 Round Pins: tin-plated Copper Lead Pull Strength 10 N (IEC ) Solderability Soldering Heat Resistance 260 C, 3s (Wave) 350 C, 1s (Soldering Iron) 260 C, 10s (IEC ) 350 C, 3s (Soldering Iron) Operating Temperature Climatic Category Stock Condition Vibration Resistance -65 C to +125 C (based on internal thermal cycle test up 125 C consider de-rating) -40 C / +85 C / 21days (EN ,-2-1,-2-2,-2-78) +10 C to +60 C relative humidity 75% yearly average, without dew, maximum value for 30 days-95% 24 cycles at 15min. Each (EN ) Hz at 0.75 mm amplitude Hz at 10g acceleration Dimensions Part Numbering System xxxx 0000 max Holes in PCB min Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,000pcs.) 0410 Short Leads - Bulk (1,000pcs.) 383 Series Long Leads (L=18.8mm) Short Leads (L=4.3mm) Packaging 383 Series Tape & Ammopack Short Leads N/A N/A 1,000 1, N/A N/A Please refer to for current information Series

166 Introduction to Circuit Protection Transientology 162

167 Radial Lead Fuses TE5 > Time-Lag > 369 Series 369 Series, TE5, Time-Lag Fuse Description TE5 Features Agency Approvals Agency Agency File Number Ampere Range Lead-free Applications Electrical Characteristics for Series % of Ampere % % % % Opening Time 369 Series Electrical Characteristics Specifications by Item Amp Code Amp (A) Voltage (V) Breaking Capacity Voltage Drop 1.0 x IN max. (mv) Power Dissipation 1.5 x IN max. (mw) Melting Integral 10 x IN min. (A 2 s) Agency Approvals A@300VAC 50-60Hz/cos = X X X X X X X X X X X X X Please refer to for current information. 163 Revised: May 5, Series

168 6.3A 5A 4A 3.15A 2.5A 2A 1.6A 1.25A 1A.800A Introduction to Radial Circuit Lead Protection Fuses TE5 > Time-Lag Transientology > 369 Series Temperature Rerating Curve Average Time Current Curves TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 369 Series 164 Please refer to for current information.

169 Radial Lead Fuses TE5 > Time-Lag > 369 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA6.6, UL 94 V0 Round Pins: Tin-plated Copper Lead Pull Strength 10 N (IEC ) Solderability Soldering Heat Resistance 260 C, 3s (Wave) 350 C, 1s (Soldering Iron) 260 C, 10s (IEC ) 350 C, 3s (Soldering Iron) Operating Temperature Climatic Category Stock Condition Vibration Resistance -40 C to +85 C (considerde-rating) -40 C / +85 C / 21days (EN ,-2-1,-2-2,-2-78) +10 C to +60 C relative humidity 75% yearly average, without dew, maximum value for 30 days-95% 24 cycles at 15min. Each (EN ) Hz at 0.75 mm amplitude Hz at 10g acceleration Dimensions Part Numbering System 8.5 max xxxx 0000 max Holes in PCB min 1.5 Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,400pcs.) 0440 Short Leads - Bulk (1,400pcs.) 369 Series Long Leads (L=18.8mm) Short Leads (L=4.3mm) Packaging 369 Series Tape & Ammopack Short Leads N/A N/A 1,400 1, N/A N/A Please refer to for current information Series

170 Introduction to Circuit Protection Transientology 166

171 Radial Lead Fuses TE5 > Transient Tolerant > 385 Series 385 Series, TE5, Telecom Interface Protector Fuse Description The 385 Series are TE5, protector, time-lag type, 125V rated fuses, that are designed in accordance to UL Features telecom applications separation requirements encapsulated casing Agency Approvals times to 1.5A Agency Agency File Number Ampere Range E mA - 1.5A Applications Electrical Characteristics % of Ampere Opening Time % 2 Hours, Max. 300% 300 ms, Min. ; 5 Seconds, Max. 385 Series Electrical Characteristics Amp Code Rated Current Voltage Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Disspation 1.0 x I N max. (mw) Melting Integral 10 x I N min. (A 2 s) Surge Amplitude (A) 1 FCC Bellcore ITU Agency Approvals mA 125V x mA 125V x mA 125V 50 A / 125 VAC x Hz A 125V cosϕ= x A 125V x A 125V x 1 FCC 47 Part 68: Minimum pulse load quantity is 2 pulses at a test generator output of 800V and 10x560μs waveform. ITU-T K.20: Minimum pulse load quantity is 30 pulses at a test generator output of 0V, 67A and 10x700μs waveform. Bellcore GR-1089: Minimum pulse load quantity is 50 pulses at a test generator output of 0V and 10x0μs. Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Please refer to for current information. 167 Revised: June 17, Series

172 Introduction to Radial Circuit Lead Protection Fuses TE5 > Transient Tolerant Transientology > 385 Series Temperature Rerating Curve Average Time Current Curves A 0.500A 0.800A 1.00A 1.25A 1.50A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 385 Series 168 Please refer to for current information.

173 Radial Lead Fuses TE5 > Transient Tolerant > 385 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC to +85ºC/21 days (EN ,-2-1,-2-2,-2-78) +10 ºC to +60 ºC RH, 75% yearly average, without dew, maximum value for 30 days-95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10 g acceleration Dimensions Part Numbering System 8,5 max xxxx 0000 max. 8 18,8 0,6 5,08 0,5 min 1 +0,1 1,5 Dimensions (mm) Holes in PCB Long Leads (L=18.8mm) Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,400 pcs.) 385 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 385 Series Tape & Ammopack N/A 1, N/A Please refer to for current information Series

174 Introduction to Circuit Protection Transientology 170

175 Radial Lead Fuses TE5 > Fast Acting > 391 Series 391 Series, TE5, Fast-Acting Fuse Description The 391 Series are TE5 short circuit protector, fast-acting type, 65V rated fuses. For Short Circuit Protection of Sensitive Electronic Components and Assemblies. Features Agency Approvals Agency Agency File Number Ampere Range applications requirements times separation encapsulated casing Lead-free to 4A. E mA - 4A Applications Electrical Characteristics % of Ampere Opening Time Seconds, Max. 391 Series Electrical Characteristics Amp Code Rated Current Marking Code* Voltage Breaking Capacity Cold Resistance 0.1 x I N max. (mω) Power Disspation 1.0 x I N max. (mw) Melting Integral 10 x I N max. (A 2 s) Agency Approvals ma SP13 65 V x ma SP16 65 V x ma SP20 65 V x ma SP25 65 V x ma SP32 65 V x ma SP40 65 V x ma SP50 65 V x ma SP63 65 V 50A / 65 VAC/DC x ma SP80 65 V Hz cosϕ= x A SP 65 V x A SP V x A SP V x A SP V x A SP V x A SP V x A SP V x * Physical Marking on top of the device Please refer to for current information. 171 Revised: June 17, Series

176 Introduction to Radial Circuit Lead Protection Fuses TE5 > Fast Acting Transientology > 391 Series Temperature Rerating Curve Average Time Current Curves A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 391 Series 172 Please refer to for current information.

177 Radial Lead Fuses TE5 > Fast Acting > 391 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC to +85ºC/21 days (EN ,-2-1,-2-2,-78) +10 ºC to +60 ºC RH, 75% yearly average, without dew, maximum value for 30 days-95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10 g acceleration Dimensions Part Numbering System 8,5 max xxxx 0000 max. 8 18,8 0,6 5,08 0,5 min 1 +0,1 Holes in PCB Dimensions (mm) 1,5 Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,400 pcs.) 391 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 391 Series Tape & Ammopack N/A 1, N/A Please refer to for current information Series

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179 Radial Lead Fuses TE5 > Time-Lag > 392 Series 392 Series, TE5, Time-Lag Fuse Description TE5, time-lag type, 250V rated, designed in accordance to IEC Features approved requirements plug-in versions Agency Approvals Applications Agency Agency File Number Ampere Range / mA - 6.3A , mA - 6.3A E mA - 6.3A JET A - 5A CQC mA - 6.3A SU SU SU SU SU SU mA - 6.3A Electrical Characteristics for Series % of Ampere Opening Time 150% 1 Hour, Min. 210% 120 s, Max. 275% 400 ms Min. ; 10 Sec. Max. 400% 150 ms Min. ; 3 Sec. Max. 0% 20 ms Min. ; 150 ms Max. 392 Series Electrical Characteristic Specifications by Item Amp Code Rated Current Voltage Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.5 x I N max. (mw) Melting Integral 10 x I N min. (A 2 s) Agency Approvals ma 250V 25A/250 VAC x x x x x A 250V 25A/250 VAC x x x x x x A 250V 25A/250 VAC x x x x x x A 250V 25A/250 VAC x x x x x x A 250V 25A/250 VAC x x x x x x A 250V 25A/250 VAC x x x x x x A 250V 32A/250 VAC x x x x x x A 250V 40A/250 VAC x x x x x x A 250V 50A/250 VAC x x x x x x A 250V 63A/250 VAC x x x x x Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Please refer to for current information. 175 Revised: November 9, Series

180 Introduction to Radial Circuit Lead Protection Fuses TE5 > Time-Lag Transientology > 392 Series Temperature Rerating Curve Average Time Current Curves A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 5.00A 6.30A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 392 Series 176 Please refer to for current information.

181 Radial Lead Fuses TE5 > Time-Lag > 392 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94 V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (IEC ) Solderability Soldering Heat Resistance 260ºC, 3 sec. (Wave) 350ºC, 3 sec. (Soldering iron) 260ºC, 10 sec. (IEC ) 350ºC, 3 sec. (Soldering iron) Operating Temperature *-40ºC to +125ºC (consider de-rating) -40ºC to +85ºC/21 days Climatic Category (EN ,-2-1,-2-2,-2-78) +10 ºC to +60 ºC RH 75% yearly average, without Stock Conditions dew, maximum value for 30 days- 95% 24 cycles at 15 min. each (EN ) Vibration Resistance Hz at 0.75 mm amplitude Hz at 10 g acceleration * Internal test conditions from thermal cycling at 125 C Dimensions Part Numbering System 8.5 max xxxx 0000 max. 8 L min 1.5 Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Holes in PCB Long Leads (L=18.8mm) Short Leads (L=4.3mm) Packaging Code 0000 Tape/Ammopack (1,400 pcs.) 0440 Short Leads - Bulk (1,400 pcs.) 392 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 392 Series Tape & Ammopack N/A 1, N/A Short Leads N/A 1, N/A Please refer to for current information Series

182 Introduction to Circuit Protection Transientology 178

183 Radial Lead Fuses TE5 > Fast-Acting > 395 Series 395 Series, TE5, Fast-Acting Fuse Description The 395 Series are TE5, fast-acting type, 125V rated fuses, designed in accordance to UL Features Agency Approvals requirements plug-in versions approved to 6.3A Agency Agency File Number Ampere Range File number: E mA - 6.3A Applications File number: E mA - 6.3A JET A - 5A Electrical Characteristics % of Ampere Opening Time 200% 60 Seconds, Max. 395 Series Electrical Characteristics Amp Code Rated Current Voltage Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.0 x I N max. (mw) Melting Integral 10 x I N max. (A 2 s) Agency Approvals mA 125V x x mA 125V x x mA 125V x x 0 ma 125V x x mA 125V x x mA 125V x x mA 125V x x mA 125V x x mA 125V x x mA 125V x x A / 125 VAC mA 125V x x Hz mA 125V cos ϕ = x x mA 125V x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Please refer to for current information. 179 Revised: May 6, Series

184 Introduction to Radial Circuit Lead Protection Fuses TE5 > Fast-Acting Transientology > 395 Series Temperature Rerating Curve Average Time Current Curves 0.050A 0.063A 0.080A 0.A 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 5.00A 6.30A TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 395 Series 180 Please refer to for current information.

185 Radial Lead Fuses TE5 > Fast-Acting > 395 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94 V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (IEC ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC to +85ºC/21 days (EN ,-2-1,-2-2,-2-78) +10 ºC to +60 ºC RH 75% yearly average, without dew, maximum value for 30 days- 95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10 g acceleration Dimensions Part Numbering System 8,5 max xxxx 0000 max. 8 L Æ 0,6 5,08 0,5 min 1 +0,1 1,5 Holes in PCB Long Leads (L=18.8mm) Short Leads (L=4.3mm) Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,400 pcs.) 0440 Short Leads - Bulk (1,400 pcs.) 395 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 395 Series Tape & Ammopack N/A 1, N/A Short Leads N/A 1, N/A Please refer to for current information Series

186 Introduction to Circuit Protection Transientology 182

187 Radial Lead Fuses TE5 > Time-Lag > 396 Series 396 Series, TE5, Time-Lag Fuse Description The 396 Series are TE5, time-lag type, 125V rated, fuses, designed in accordance to UL Features Agency Approvals Agency Agency File Number Ampere Range requirements plug-in versions approved to 6.3A File number: E File number: E JET Electrical Characteristics % of Ampere Opening Time 50mA - 6.3A 50mA - 6.3A 1A - 5A Applications 396 Series 200% 60 Seconds, Max. Electrical Characteristics Amp Code Rated Current Voltage Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.0 x I N max. (mw) Melting Integral 10 x I N min. (A 2 s) Agency Approvals mA 125V x x mA 125V x x mA 125V x x 0 ma 125V x x mA 125V x x mA 125V x x mA 125V x x mA 125V x x mA 125V x x mA 125V x x A / 125 VAC mA 125V x x Hz mA 125V cos ϕ = x x mA 125V x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x x A 125V x x Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Please refer to for current information. 183 Revised: May 6, Series

188 Introduction to Radial Circuit Lead Protection Fuses TE5 > Time-Lag Transientology > 396 Series Temperature Rerating Curve Average Time Current Curves A 0.063A 0.080A 0.A 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 5.00A 6.30A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 396 Series 184 Please refer to for current information.

189 Radial Lead Fuses TE5 > Time-Lag > 396 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94 V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (IEC ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC to +85ºC/21 days (EN ,-2-1,-2-2,-2-78) +10 ºC to +60 ºC RH 75% yearly average, without dew, maximum value for 30 days- 95% 24 cycles at 15 min. each (IEC ) Hz at 0.75 mm amplitude Hz at 10 g acceleration Dimensions Part Numbering System 8,5 max xxxx 0000 max. 8 L Æ 0,6 5,08 0,5 min 1 +0,1 1,5 Holes in PCB Long Leads (L=18.8mm) Short Leads (L=4.3mm) Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,400 pcs.) 0440 Short Leads - Bulk (1,400 pcs.) 396 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 396 Series Tape & Ammopack N/A 1, N/A Short Leads N/A 1, N/A Please refer to for current information Series

190 Introduction to Circuit Protection Transientology 186

191 Radial Lead Fuses TE5 > Transient Tolerant Fuse > 397 Series 397 Series, TE5, Transient Tolerant Fuse Description The 397 Series are TE5, time-lag type, 125V rated fuses, designed in accordance to UL Features Agency Approvals telecom applications requirements plug-in versions Lead-free to 1.5A Agency Agency File Number Ampere Range File No.: E mA - 1.5A Applications Electrical Characteristics % of Ampere File No.: E mA - 1.5A Opening Time 200% 60 Seconds, Min. 397 Series 570% 80 ms. Min.; 2 Sec. Max. 1700% 200 s., Max. Electrical Characteristics Amp Code Rated Current Voltage Breaking Capacity Voltage Drop 1.0 x I N max. (mv) Power Dissipation 1.0 x I N max. (mw) Melting Integral 10 x I N min. (A 2 s) Surge Amplitude (A) 1 FCC Bellcore ITU Agency Approvals ma 125 V x x ma 125 V x x ma 125 V 50A / 125 VAC x x Hz A 125 V cos ϕ = x x A 125 V x x A 125 V x x 1 FCC 47 Part 68: Minimum pulse load quantity is 2 pulses at a test generator output of 800 V and 10x560 μs waveform. ITU-T K.20: Minimum pulse load quantity is 30 pulses at a test generator output of 0 V, 67 A and 10x700 μs waveform. Bellcore GR-1089: Minimum pulse load quantity is 50 pulses at a test generator output of 0 V and 10x0 μs. Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Please refer to for current information. 187 Revised: May 6, Series

192 Introduction to Radial Circuit Lead Protection Fuses TE5 > Transient Tolerant Fuse Transientology > 397 Series Temperature Rerating Curve Average Time Current Curves 0.350A 0.500A 0.800A 1.00A 1.25A 1.50A TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 397 Series 188 Please refer to for current information.

193 Radial Lead Fuses TE5 > Transient Tolerant Fuse > 397 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC to +85ºC/21 days (EN ,-2-1,-2-2,-78) +10 ºC to +60 ºC RH, 75% yearly average, without dew, maximum value for 30 days-95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10 g acceleration Dimensions Part Numbering System 8,5 max xxxx 0000 max. 8 L 0,6 5,08 0,5 min 1 +0,1 Dimensions (mm) Holes in PCB Long Leads (L=18.8 mm) Short Leads (L=4.3 mm) 1,5 Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Code 0000 Tape/Ammopack (1,400 pcs.) 0440 Short Leads - Bulk (1,400 pcs.) 397 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 397 Series Tape & Ammopack N/A 1, N/A Short Leads N/A 1, N/A Please refer to for current information Series

194 Introduction to Circuit Protection Transientology 190

195 Radial Lead Fuses TE5 > Medium Time-Lag > 398 Series 398 Series, TE5, Modul Protector Fuse Description The 398 Series are TE5 short circuit protector, medium time-lag type, 65V rated fuses. Features requirements encapsulated casing times to 4A Agency Approvals separation Agency Agency File Number Ampere Range E mA - 4A Applications Electrical Characteristics % of Ampere Opening Time Seconds, Max. 398 Series Electrical Characteristics Amp Code Rated Current Marking Code* Voltage Breaking Capacity Cold Resistance 0.1 x I N typ. (mω) Power Disspation 1.0 x I N max. (mw) Melting Integral 10 x I N typ. (A 2 s) Agency Approvals mA MP13 65V x mA MP25 65V x mA MP32 65V x mA MP40 65V x mA MP50 65V x mA MP63 65V x mA MP80 65V 50A / 65 VAC/DC x A MP 65V Hz cosϕ= x A MP125 65V x A MP160 65V x A MP200 65V x A MP250 65V x A MP315 65V x A MP400 65V x * Physical Marking on top of the device Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Please refer to for current information. 191 Revised: Jan 12, Series

196 Introduction to Radial Circuit Lead Protection Fuses TE5 > Medium Time-Lag Transientology > 398 Series Temperature Rerating Curve Average Time Current Curves A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 398 Series 192 Please refer to for current information.

197 Radial Lead Fuses TE5 > Medium Time-Lag > 398 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC to +85ºC/21 days (EN ,-2-1,-2-2,-78) +10ºC to +60ºC RH, 75% yearly average, without dew, maximum value for 30 days-95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10 g acceleration Dimensions Part Numbering System 8,5 max.4 max. 8 Series 18,8 0,6 0,5 min 1,5 5, ,1 Holes in PCB Dimensions (mm) Packaging Code 398 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Reel Size 398 Series Tape & Ammopack N/A 1, N/A Please refer to for current information Series

198 Introduction to Circuit Protection Transientology 194

199 Radial Lead Fuses TE5 > Time-Lag > 399 Series 399 Series, TE5, Inrush Protector Fuse Description The 399 Series are TE5, time-lag type, 65V rated fuses. For Short Circuit Protection of Sensitive Electronic Components and Assemblies. Features requirements encapsulated casing Agency Approvals Agency Agency File Number Ampere Range times separation to 4A E mA - 4A Applications Electrical Characteristics % of Ampere Opening Time Seconds, Max. 399 Series Electrical Characteristics Amp Code Rated Current Marking Code* Voltage Breaking Capacity Cold Resistance 0.1 x I N typ. (mω) Power Disspation 1.0 x I N max. (mw) Melting Integral 10 x I N typ. (A 2 s) Agency Approvals ma IP13 65 V x ma IP16 65 V x ma IP20 65 V x ma IP25 65 V x ma IP32 65 V x ma IP40 65 V x ma IP50 65 V x ma IP63 65 V 50A / 65 VAC/DC x ma IP80 65 V Hz cosϕ= x A IP 65 V x A IP V x A IP V x A IP V x A IP V x A IP V x A IP V x * Physical Marking on top of the device Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Please refer to for current information. 195 Revised: Jan 12, Series

200 Introduction to Radial Circuit Lead Protection Fuses TE5 > Time-Lag Transientology > 399 Series Temperature Rerating Curve Average Time Current Curves A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1.00A 1.25A 1.60A 2.00A 2.50A 3.15A 4.00A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 399 Series 196 Please refer to for current information.

201 Radial Lead Fuses TE5 > Time-Lag > 399 Series Product Characteristics Materials Base/Cap: Brown Thermoplastic Polyamide PA 6.6, UL 94V-0 Round Pins: Copper, Tin-plated Lead Pull Strength 10 N (EN ) Solderability Soldering Heat Resistance 260ºC, 3s. (Wave) 350ºC, 1s. (Soldering Iron) 260ºC, 10s. (IEC ) 350ºC, 3s. (Soldering Iron) Operating Temperature Climatic Category Stock Conditions Vibration Resistance -40ºC to +85ºC (consider de-rating) -40ºC to +85ºC/21 days (EN ,-2-1,-2-2,-78) +10 ºC to +60 ºC RH, 75% yearly average, without dew, maximum value for 30 days-95% 24 cycles at 15 min. each (EN ) Hz at 0.75 mm amplitude Hz at 10 g acceleration Dimensions Part Numbering System 8,5 max.4 max. 8 Series 18,8 0,6 0,5 min 1,5 5,08 Holes in PCB 1 +0,1 Packaging Code 399 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Reel Size 399 Series Tape & Ammopack N/A 1, N/A Please refer to for current information Series

202 Introduction to Circuit Protection Transientology 198

203 Axial Lead & Cartridge Fuses PICO ll > Very Fast-Acting > 251/253 Series 251/253 Series, PICO II, Very Fast-Acting Fuse PS E TUV QPL Description The PICO II Very Fast-Acting Fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. Features range (62mA- 15A) temperature range rerating Agency Approvals Agency Agency File Number Ampere Range E10480 LR mA - 15A 62mA - 15A PS E JET A - 5A TUV J mA - 10A QPL FM10 62mA - 15A mA to 5A Pending 7A, 10A 500mA, 1A, 2A, 2.5A, 3A, 4A, 5A, 7A, 10A Applications Secondary protection for space constrained applications Electrical Characteristics for Series % of Ampere Ampere Opening Time % 62mA - 15A 4 Hours, Min. 200% 275% 400% 0% 62mA - 7A 1 Second, Max. 10A 3 Seconds, Max A 10 Seconds, Max. 500mA, 1A, 2A, 2.5A, 3A, 4A, 5A, 7A, 10A 500mA, 1A, 2A, 2.5A, 3A, 4A, 5A, 7A, 10A 500mA, 1A, 2A, 2.5A, 3A, 4A, 5A, 7A, 10A 300 msecs., Max. 30 msecs., Max. 4 msecs., Max. 251/253 Series Please refer to or /253.html for current information. 199 Revised: February 8, /253 Series

204 Introduction Axial Lead to & Circuit Cartridge Protection Fuses PICO ll > Very Fast-Acting > 251/253 Transientology Series Electrical Specifications by Item Ampere (A) Amp Code Ordering Number (Std.) Ordering Number (Mil.) Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nom Voltage Drop (V) Agency Approvals PS E TUV QPL x x x x x x x x x x x x x x x x x rated x x voltage DC x x x x rated x x x x x x voltage AC x x x x x x x x For CCC 7A: rated x x x x x x voltage AC x x x x x x x x x x x For CCC 10A: x x x x rated voltage AC x x x x x x x x x x x x x x x x P x x x x P x x x x x Note: Higher ampere ratings are available. Please contact Littelfuse Technical Support or your Littelfuse products representative for assistance. P = Pending For Sand Filled-part , please add S suffix in the part number 251/253 Series 200 Please refer to or /253.html for current information.

205 Axial Lead & Cartridge Fuses PICO ll > Very Fast-Acting > 251/253 Series Temperature Rerating Curve Average Time Current Curves.062A.125A.250A.375A.500A.630A.750A 1A 1.25A 1.5A 2A 2.5A 3A 3.5A 4A 5A 7A 10A 12A 15A 10 TIME IN SECONDS Note: 1. Rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation Soldering Parameters Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds CURRENT IN AMPERES Solder Pot Temperature: Solder Dwell Time: 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 251/253 Series Please refer to or /253.html for current information /253 Series

206 Introduction Axial Lead to & Circuit Cartridge Protection Fuses PICO ll > Very Fast-Acting > 251/253 Transientology Series Product Characteristics Materials Encapsulated, Epoxy-Coated Body: Pure Tin-coated Copper wire leads Solderability MIL-STD-202, Method 208 Lead Pull Force Fuses To MIL SPEC MIL-STD-202, Method 211, Test Condition A (will withstand a 7lbs. axial pull test) 251/253 Series is available in FM10 on QPL for MIL-PRF To order, change 251 to 253 Operating Temperature Shock Vibration 55ºC to +125ºC MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 msecs.) MIL-STD-202, Method 201 (10 55 Hz); Method 204, Test Condition C ( Hz at 10 G s Peak) Moisture Resistance MIL-STD-202, Method 106 Resistance to Soldering Heat Flammability UL 94V 0 Withstands 60 seconds above 200 O C and up to 260ºC, maximum Dimensions 6.35 (.25") tape 6.35 (.25") tape 6.35 (.25") tape 251 Series (RoHS Version) Markings (T1 lead length) (1.094") 5.0 (.197") (1.094") 5.0 (.197") Wire Diameter: 0.64 (.025") for amp, 0.81 (.032") for amp 38.1 (1.5") 5.0 (.197") 62.7 (2.468") 52.4 (2.062")* 7.11 (.280") 1 A 1 A Wire Diameter: 0.64 (.025") for amp, 0.81 (.032") for amp 251 Series (RoHS and Halogen-free Version) Markings (T1 lead length) 62.7 (2.468") 52.4 (2.062")* 7.11 (.280") LF 1 A 253 Series (RoHS Version) Markings (T3 lead length) (3.28") 73.0 (2.874")** 7.11 (.280") LF L F Wire Diameter: 0.64 (.025") for amp, 0.81 (.032") for 15 amp FL FL 1 A FL 1 A 1 A (1.094") 2.80 (.11") MAX (1.094") 2.80 (.11") MAX 38.1 (1.5") 6.35 (.25") tape 6.35 (.25") tape 2.61 (.103") MAX 6.35 (.25") tape Part Numbering System Series 251 = Standard type 253 = Military type Quantity Type of Packaging 0251 xxxx N R T1 L Current Refer to Amp Code column of Electrical Specifications Table N = 5000 P = 2000 M = 0 H = R = Reel A = Ammo Pack X = Loose Pack Lead Length The default lead length for Ammo pack and Loose pack is now T1 for 251 series, and remains T3 for 253 series, therefore: T1 = 52.4mm (2.062 ), 251 series only* Blank = 52.4mm (2.062 ) for 251 series* or 73mm (2.874 ) for 253 series** Option Codes L = RoHS HF = RoHS and Halogen-free (for 251 Series only) Packaging Packaging Option Packaging Specification Quantity & Packaging Code *T1: 52.4mm (2.062") Tape and Reel EIA 296 **T3: 73mm (2.874') Tape and Reel EIA 296 Please refer to available quantities above in "Part Numbering System The default lead length for both ammo pack and loose pack is T1 for 251 and is T3 for 253. Notes: * T1 dimension is defined as the length of the component between the two tapes. The full component length is 62.7mm (2.468"). T1 length is for 251 series only. ** T3 dimension is defined as the length of the component between the two tapes. The full component length is mm (3.28 ). T3 length is for 253 series only. 251/253 Series 202 Please refer to or /253.html for current information.

207 Axial Lead & Cartridge Fuses PICO > Very Fast-Acting > 275 Series 275 Series, PICO, Very Fast-Acting Fuse Description The PICO Very Fast-Acting Fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. Features (20A- 30A) temperature range rating Agency Approvals Applications Agency Agency File Number Ampere Range E A - 30A Electrical Characteristics % of Ampere Ampere Opening Time % Hours, Min. 200% Seconds, Max. Electrical Characteristics Ampere (A) Amp Code Ordering Number Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals rated voltage x VDC x rated voltage VAC x 275 Series Please refer to for current information. 203 Revised: Mar 4, Series

208 Introduction Axial Lead to & Circuit Cartridge Protection Fuses PICO > Very Fast-Acting Transientology > 275 Series Temperature Rerating Curve Average Time Current Curves 20A 25A 30A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation Soldering Parameters Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds CURRENT IN AMPERES Solder Pot Temperature: Solder Dwell Time: 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 275 Series 204 Please refer to for current information.

209 Axial Lead & Cartridge Fuses PICO > Very Fast-Acting > 275 Series Product Characteristics Materials Transparent sleeve covered body, Pure Tin-coated copper wire leads Solderability MIL-STD-202, Method 208 Lead Pull Force MIL-STD-202, Method 211, Test Condition A (will withstand a 5lbs. axial pull test) Operating Temperature Shock Vibration 55ºC to +125ºC MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) and per method 2028 (78G s peak for 11 milliseconds) MIL-STD-202, Method 201 (10 55 Hz); Method 204, Test Condition D (Vibrations of cps at 20 G s) Moisture Resistance MIL-STD-202, Method 106 Dimensions Series Part Numbering System 0275 xxxx M R T1 L B A B Series 275 D Transparent Insulating Sleeve 3/4 A C DIA. Current Refer to Amp Code column of Electrical Characteristics Table Quantity M = 0 V = 5 Amperage Dimensions in mm (inches) A 7.87 (.31") B (1.094") C 3.38 (.133") D (.040") Type of Packaging R = Reel X = Loose Pack Lead Length T1 = 52.4mm (2.062 ) Blank = For Loose pack (MXL,VXL) Packaging Packaging Option Packaging Specification RoHS Only RoHS parts are available for 275 Series Quantity & Packaging Code 275 Series T1: 52.4mm (2.062") Tape and Reel EIA 296 Please refer to available quantities above in Part Numbering System The default lead length for loose pack is T1. Please refer to for current information Series

210 Introduction to Circuit Protection Transientology 206

211 Axial Lead & Cartridge Fuses PICO ll > Very Fast-Acting > 263 Series 263 Series, PICO II 250 Volt, Very Fast-Acting Fuse PS E Description The PICO II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small package. Features Agency Approvals Agency Agency File Number Ampere Range E mA - 5A PS E JET A - 5A LR mA - 5A rating available (62mA to 5A) Applications Electrical Characteristics Halogen-free temperature range de-rating machines % of Ampere Opening Time % 4 Hours, Min. 200% 1 Second, Max. 300% 0.1 Second, Max. Electrical Characteristics Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nom Voltage Drop (mv) Agency Approvals x x x x x x x x x amperes x x at 250 VAC x x x PSE: x x x amperes at 125 VAC x x x x x x x x x x x x x x x x x x PS E 263 Series Please refer to for current information. 207 Revised: January 19, Series

212 Introduction Axial Lead to & Circuit Cartridge Protection Fuses PICO ll > Very Fast-Acting Transientology > 263 Series Temperature Rerating Curve Average Time Current Curves 1/16A 1/8A 1/4A 3/8A 1/2A 3/4A 1A 1 1/2A 2A 2 1/2A 3A 3 1/2A 4A 5A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation Soldering Parameters Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds CURRENT IN AMPERES Solder Pot Temperature: Solder Dwell Time: 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 263 Series 208 Please refer to for current information.

213 Axial Lead & Cartridge Fuses PICO ll > Very Fast-Acting > 263 Series Product Characteristics Encapsulated, Epoxy-Coated Body: Solder Coated Copper Leads. Materials RoHS compliant Product: Pure Tin coated Copper wire leads Solderability MIL-STD-202. Method 208. Product Marking Operating Temperature Shock Body marking, current rating and logo 55ºC to +125ºC MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) Vibration Salt Spray Insulation Resistance (After Opening): Resistance to Soldering Heat MIL-STD-202, Method 201 (10 55 Hz); MIL-STD-202, Method 204, Test Condition C ( Hz at 10 G s Peak) MIL-STD-202, Method 101, Test Condition B (48 hrs.) MIL-STD-202, Method 302, Test Condition A (10,000 ohms minimum at volts) MIL-STD-202, Method 210, Test Condition C (10 sec. at 260ºC) Thermal Shock MIL-STD-202, Method 107, Test Condition B ( 55ºC to 125ºC) Moisture Resistance MIL-STD-202, Method 106 Lead Pull Force MIL-STD-202, Method 211, Test Condition A (will withstand 7 lb. axial pull test) Dimensions Part Numbering System 6.35 (.25") tape (1.094") 0.64 (.025") 5.0 (.197") 62.7 (2.468") 52.4 (2.062")* 7.11 (.280") FL 3 1/2 A 250 V FL 3 1/2 A 250 V (1.094") 3.94 (.16") MAX 6.35 (.25") tape Series 0263 xxxx W R T1 L Current Refer to Amp Code column of Electrical Characteristics Table Quantity W = 3000 M = 0 H = Type of Packaging R = Reel A = Ammo Pack X = Loose Pack Lead Length T1: 52.4mm (2.062 )* L - RoHS HF - Halogen-free 263 Series Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code T1: 52.4mm (2.062 ) Tape and Reel EIA 296 Please refer to available quantities above in Part Numbering System Notes: * T1 dimension is defined as the length of the component between the two tapes. The full component length is 62.7mm (2.468"). Please refer to for current information Series

214 Introduction to Circuit Protection Transientology 210

215 Axial Lead & Cartridge Fuses PICO ll > Time-Lag > 471 Series 471 Series, PICO II, Time-Lag Fuse PS E Description The 471 Series PICO II Time-Lag Fuse is designed for applications that require moderate in rush withstand and is in a space-saving subminiature package. Features Agency Approvals withstand ratings available (500mA to 5A) temperature range de-rating Agency Agency File Number Ampere Range Applications E mA - 5A LR mA - 2.5A PS E JET A - 5A Electrical Characteristics % of Ampere Opening Time % 4 Hours, Min. 200% 120 Seconds, Max. Electrical Characteristics Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nom Voltage Drop (mv) Agency Approvals X X X X X X X X amperes at 125 VAC X X X and VDC X X X X X X X X X PS E 471 Series Please refer to for current information. 211 Revised: June 1, Series

216 Introduction Axial Lead to & Circuit Cartridge Protection Fuses PICO ll > Time-Lag Transientology > 471 Series Temperature Rerating Curve Average Time Current Curves 0.5A 1A 1.5A 2A 2.5A 3A 4A 5A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation Soldering Parameters Recommended Process Parameters: Wave Parameter Lead-Free Recommendation Preheat: (Depends on Flux Activation Temperature) (Typical Industry Recommendation) Temperature Minimum: Temperature Maximum: Preheat Time: C 150 C seconds CURRENT IN AMPERES Solder Pot Temperature: Solder Dwell Time: 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 471 Series 212 Please refer to for current information.

217 Axial Lead & Cartridge Fuses PICO ll > Time-Lag > 471 Series Product Characteristics Encapsulated, Epoxy-Coated Body; Solder Coated Copper wire leads; Materials RoHS compliant Product: Pure Tin-coated Copper wire leads Flammability UL 94V-0 Solderability MIL-STD-202, Method 208 Lead Pull Force MIL-STD-202, Method 211, Test Condition A (will withstand a 7 lbs. axial pull test) Operating Temperature Shock Vibration 55ºC to +125ºC MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) MIL-STD-202, Method 201 (10 55 Hz); Method 204, Test Condition C ( Hz at 10 G s Peak) Moisture Resistance MIL-STD-202, Method 106 Resistance to Soldering Heat Withstands 60 seconds above 200ºC and up to 260ºC, maximum Dimensions Part Numbering System 6.35 (.25") tape 6.35 (.25") tape 471 Series (RoHS Version) Markings 62.7 (2.468") (1.094") 0.64 (.025") 5.0 (.197") (1.094") 0.64 (.025") 5.0 (.197") 52.4 (2.062")* 7.11 (.280") 1A T FL T FL 1A 62.7 (2.468") 52.4 (2.062")* 7.11 (.280") 1A 1A (1.094") 2.8 (.110") MAX (1.094") 2.8 (.110") MAX 6.35 (.25") tape 471 Series (RoHS and Halogen-free Version) Markings Packaging Packaging Option 6.35 (.25") tape Packaging Specification Series Quantity N = 5000 P = 2000 Type of Packaging Lead Length T1: 52.4mm (2.062 )* Option Codes 0471 xxxx N R T1 L Current Refer to Amp Code column of Electrical Characteristics Table R = Reel A = Ammo Pack L = RoHS HF = RoHS and Halogen-free Quantity & Packaging Code 471 Series *T1: 52.4mm (2.062") Tape and Reel EIA 296 Please refer to available quantities above in "Part Numbering System Notes: * T1 dimension is defined as the length of the component between the two tapes. The full component length is 62.7mm (2.468"). Please refer to for current information Series

218 Introduction to Circuit Protection Transientology 214

219 Axial Lead & Cartridge Fuses PICO ll > Time-Lag > 472 Series 472 Series, PICO II, Time-Lag Fuse Description The 472 Series PICO II, 125V rated time-lag fuse is designed for applications that require moderate in-rush withstand and is in a space-saving subminature package. Features withstand temperature range Agency Approvals ratings available (500mA to 5A) de-rating Agency Agency File Number Ampere Range E mA - 5A Applications Equipment Electrical Characteristics % of Ampere Opening Time % 4 Hours, Min. 200% 120 Seconds, Max. Electrical Characteristics Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x amperes at 125 VAC and VDC x x x x 472 Series Please refer to for current information. 215 Revised: Jan 12, Series

220 Introduction Axial Lead to & Circuit Cartridge Protection Fuses PICO ll > Time-Lag Transientology > 472 Series Temperature Rerating Curve Average Time Current Curves 0.5A 1.0A 1.5A 2.0A 2.5A 3.0A 5.0A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation Soldering Parameters Recommended Process Parameters: CURRENT IN AMPERES Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 472 Series 216 Please refer to for current information.

221 Axial Lead & Cartridge Fuses PICO ll > Time-Lag > 472 Series Product Characteristics Material Product Marking Body: Ceramic Leads: Tin-coated Copper Encapsulated: Epoxy-Coated Body Body: Brand Logo, Current, T (time Lag fuse) Solderability MIL-STD-202, Method 208 Lead Pull Force MIL-STD-202, Method 211, Test Condition A (will Withstand a 7lbs. Axial pull test) Operating Temperature Thermal Shock Vibration 55ºC to +125ºC with proper de rating MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) MIL-STD-202, Method 201 (10-55 Hz); Method 204, Test Condition C ( Hz at 10 G s Peak) Dimensions Part Numbering System 6.35 (.25") tape 62.7 (2.468") (2.062")* (1.094") 7.11 (.280") (1.094") 0.64 (.025") 2.80 (.11") 1 A 5.0 (.197") T FL 2A 472 series markings 6.35 (.25") tape Series 0472 xxxx N R T1 L Current Refer to Amp Code column of Electrical Characteristics Table Quantity N = 5000 M = 0 Coating Diameter (max): 0.5A-3.0A: 2.80mm 5.0A: 2.90mm Type of Packaging R = Reel A = Ammo Pack X = Loose Pack Lead Length T1: 52.4mm (2.062 )* RoHS Packaging Packaging Option Packaging Specification Quantity *T1: 52.4mm (2.062 ) Tape and Reel EIA 296 Quantity & Packaging Code Refer to the tables in Part Numbering System above 472 Series Notes: * T1 dimension is defined as the length of the component between the two tapes. The full component length is 62.7mm (2.468"). Please refer to for current information Series

222 Introduction to Circuit Protection Transientology 218

223 Axial Lead & Cartridge Fuses PICO ll > Slo-Blo > 473 Series 473 Series, PICO II, Slo-Blo Fuse PS E Description The PICO II Slo-Blo Fuse combines time-delay performance characteristics with the proven reliability of a PICO Fuse. Features Agency Approvals Agency Agency File Number Ampere Range E10480 LR mA - 7A 375mA - 7A PS E JET A - 5A withstand ratings (375mA - 7A) Applications Electrical Characteristics temperature range de-rating) % of Ampere Opening Time % 4 Hours, Min. 200% 1 Sec., Min.; 60 Sec., Max. 300% 0.2 Sec., Min.; 3 Sec., Max. 800% 0.02 Sec., Min.; 0.1 Sec., Max. Electrical Characteristics Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nom Voltage Drop (mv) Agency Approvals X X X X X X X X X X X X X X X 50 amperes at 125 VDC/ X X X VAC X X X X X X X X X X X X X X X X X PS E 473 Series Please refer to for current information. 219 Revised: Jan 12, Series

224 Introduction Axial Lead to & Circuit Cartridge Protection Fuses PICO ll > Slo-Blo Transientology > 473 Series Temperature Rerating Curve Average Time Current Curves 0.375A.50A.75A 1.0A 1.5A 2.0A 2.5A 3.0A 3.5A 4.0A 5.0A 7.0A TIME IN SECONDS 10 1 Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 0.1 Soldering Parameters Recommended Process Parameters: CURRENT IN AMPERES 0 Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 473 Series 220 Please refer to for current information.

225 Axial Lead & Cartridge Fuses PICO ll > Slo-Blo > 473 Series Product Characteristics Materials Encapsulated, Epoxy-Coated Body; Solder Coated Copper wire leads; RoHS compliant Product: Pure Tin-coated Copper wire leads Solderability MIL-STD-202, Method 208 Lead Pull Force Operating Temperature Shock MIL-STD-202, Method 211, Test Condition A (will withstand 7 lbs. axial pull test) 55 º C to +125ºC MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds) Vibration Salt Spray Insulation Resistance (After Opening): Resistance to Soldering Heat Thermal Shock Moisture Resistance MIL-STD-202, Method 201 (10 55 Hz); MIL-STD-202, Method 204, Test Condition C ( Hz at 10 G s Peak) MIL-STD-202, Method 101, Test Condition B MIL-STD-202, Method 302, (10,000 ohms minimum at volts) MIL-STD-202, Method 210, Test Condition C (20 sec at 260ºC) MIL-STD-202, Method 107, Test Condition B ( 65ºC to 125ºC) MIL-STD-202, Method 106 (90 98% RH), Heat (65ºC) Dimensions Part Numbering System 6.35 (.25") tape (1.094") 0.64 (.025") 5.0 (.197") 62.7 (2.468") 52.4 (2.062")* 7.11 (.280") FL 1 A FL 1 A 473 series markings (1.094") 3.43 (.135") MAX 6.35 (.25") tape Series 0473 xxxx Y R T1 L Current Refer to Amp Code column of Electrical Characteristics Table Quantity Y = 4000 P = 2000 M = 0 Type of Packaging R = Reel A = Ammo Pack X = Loose Pack Packaging Lead Length T1: 52.4mm (2.062 )* RoHS 473 Series Packaging Option Packaging Specification Quantity & Packaging Code *T1: 52.4mm (2.062") Tape and Reel EIA 296 Please refer to available quantities above in "Part Numbering System Notes: * T1 dimension is defined as the length of the component between the two tapes. The full component length is 62.7mm (2.468"). Please refer to for current information Series

226 Introduction to Circuit Protection Transientology 222

227 Axial Lead & Cartridge Fuses PICO > Very Fast Acting > 265/266/267 Series 265/266/267 Series, PICO, Very Fast-Acting Fuse (High-Reliability) QPL Description The 265/266/267 Series are high reliability PICO Fuses, that are very fast-acting, with an insulating sleeve. These fuses provide supplemental protection in enduse equipment to provide protection for components or internal circuits. They are not suitable for branch or feeder circuit use. The Military version of the 265 Series (except 1/16 ampere rating) is available in FM08A on QPL for MIL-PRF-23419/8. To order, change 265 to 267. Features Agency Approvals Agency Agency File Number Ampere Range E mA - 15A LR mA - 10A QPL FM08A 062mA - 10A to 15A Electrical Characteristics % of Ampere Ampere Opening Time % 1/ Hours, Min. 200% radial leaded and subminiature formats 1/ Second, Max Second, Max Second, Max. Electrical Characteristics Ampere (A) Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Agency Approvals QPL X X X X X X X X X X X X X X X X X X X X X amperes at rated voltage V DC X X X amperes at rated voltage V X X X AC X X X X X X X X X X X X X X X X X X X X X 265/266/267 Please refer to / 266.html/or /267.html for current information. 223 Revised: February 6, /266/267 Series

228 Introduction Axial Lead to & Circuit Cartridge Protection Fuses PICO > Very Fast Acting > 265/266/267 Transientology Series Temperature Rerating Curve Average Time Current Curves 1/16A 1/8A 1/4A 3/8A 1/2A 3/4A 1A 1 1/2A 2A 2 1/2A 3A 4A 5A 7A 10A 15A 10 TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation CURRENT IN AMPERES Soldering Parameters\ Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 280 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 265/266/267 Series 224 Please refer to / 266.html/or /267.html for current information.

229 Axial Lead & Cartridge Fuses PICO > Very Fast Acting > 265/266/267 Series Product Characteristics Materials Weight Body: White Thermoplastic Gold-Plated Copper Leads, Type II.32 Grams Solderability MIL-STD-202, Method 208 Lead Pull Force Sampling Options MIL-STD-202, Method 211, Test Condition A (will withstand a 5 lbs. axial pull test) AQL (Electrical Characteristics): Certified to 1% AQL Per MIL-STD-105, Inspection Level II. Traceability and Identification Records: Controlled by lot number and retained on file for a minimum of three years. Copies of Lot Certification Test data available when requested with order Special screening tests, burn-in, etc. can be supplied on special order to meet specific requirements. For information on higher current ratings, contact Littelfuse. 267 series fuses are offered with optional solder coated leads. To order, enter XT as the end suffix (see Part Numbering System section) Operating Temperature Shock Vibration Salt Spray Seal Test Insulation Resistance (After Opening) Thermal Shock 55ºC to +125ºC MIL-STD-202, Method 213, Test Condition I ( G s peak for 6 milliseconds). MIL-STD-202, Method 201 (10 55 Hz); MIL-STD-202, Method 204, Test Condition C ( Hz at 10 G s Peak) MIL-STD-202, Method 101, Test Condition B MIL-STD-202, Method 112, Test Condition A MIL-STD-202, Method 302, Test Condition A (1/2 Megohm minimum) MIL-STD-202, Method 107, Test Condition B ( 65 C to 125 C). Moisture Resistance MIL-STD-202, Method 106 Fuses To MIL SPEC 265 Series (except 1/16 ampere rating) is available in FM08A on QPL for MIL-PRF-23419/8. To order, change 265 to 267 Dimensions Part Numbering System Series 38.1 (1.50") 7.11 (.28") 38.1 (1.50") 3/4 A Transparent Insulating Sleeve 2.36 (.093") DIA Series 8.38 (.33) (Note 1) 7.11 (.28") 3/4 A (1.47") 90 Transparent Insulating Sleeve (Note 1: 9.14 (.36") for 15 amp rating) 2.36 (.093") DIA xxxx V XT Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity & Packaging Code V = (All series) 5 quantity bulk pack Lead Option Code Blank = (All series) standard lead XT = (267 series only) solder coated lead option 265/266/267 Packaging Packaging Option Quantity Quantity & Packaging Code Bulk Pack 5 V Please refer to / 266.html/or /267.html for current information /266/267 Series

230 Introduction to Circuit Protection Transientology 226

231 Axial Lead & Cartridge Fuses PICO ll > Very Fast Acting > 316 Series 316 Series PICO II, Very Fast-Acting Fuse Description The 316 Series PICO II Very Fast-Acting Fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package while complying with the requirements of CCC. Features Agency Approvals Agency Agency File Number Ampere Range Lead Fuse Lead free solder alloys and higher temperature profiles associated with Lead free assembly of 0.50A, 1.00A, 2.00A, 3.15A and 5.00 amperes mA 5A Applications Secondary protection for space constrained applications Electrical Characteristics % of Ampere Opening Time Ampere (A) % 4 Hours, Min. 200% 5 Seconds, Max. 275% 0.30 Seconds, Max. 400% 0.03 Seconds, Max. 0% Seconds, Max. Electrical Characteristics Amp Code Max Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Max Voltage Drop (mv) Agency Approvals X X VAC 125VDC X X X 316 Series Notes: 1. Cold resistance measured at less than 10% of rated current at 23 C. 2. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved 3. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options. Please refer to for current information. 227 Revised: Feb 18, Series

232 Introduction Axial Lead to & Circuit Cartridge Protection Fuses PICO ll > Very Fast Acting Transientology > 316 Series Temperature Rerating Curve Average Time Current Curves A 1.0 A 2.0 A 3.5 A 5.0 A PERCENT OF RATING* B C -40 C -20 C 0 C 20 C 40 C 60 C 80 C C 120 C -76 F -40 F -4 F 32 F 68 F 104 F 140 F 176 F 212 F 248 F AMBIENT TEMPERATURE B TIME IN SECONDS Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. Soldering Parameters CURRENT IN AMPERES Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 10 Seconds, Maximum Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 316 Series 228 Please refer to for current information.

233 Axial Lead & Cartridge Fuses PICO ll > Very Fast Acting > 316 Series Product Characteristics Materials Product Marking Lead Pull Force Body: Ceramic Leads: Tin-coated Copper Encapsulated: Epoxy-Coated body Body: Brand Logo, Current Certification mark MIL-STD-202, Method 211, Test Condition A (will withstand a 7lbs. axial pull test) Solderability MIL-STD-202, Method 208 Operating Temperature Shock Vibration 55ºC to +125ºC with proper de-rating MIL-STD-202, Method 213, Test Condition 1 (G s peak for millisecond) MIL-STD-202F, Method 201A (10-55 Hz); Method 204, Test Condition C Moisture Resistance MIL-STD-202, Method 106 Dimensions Part Numbering System 6.35 (.25") tape (1.094") 62.7 (2.468") 52.4 (2.062")* 7.11 (.280") (1.094") 0.64 (.025") 2.80 (.11") 1 A 5.0 (.197") FL front and back markings epoxy coating 6.35 (.25") tape N R T1 Series Current Refer to Amp Code column of Electrical Characteristics Table Quantity Code N = 5000 Type of Packaging R = Reel A = Ammo Pack Lead Length T1: 52.4mm (2.062 )* Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code *T1: 52.4mm (2.062") Axial Lead Tape and Reel or Ammo Pack EIA NAT1 = 5000 Ammo Pack T1 NRT1 = 5000 Tape & Reel T1 Notes: * T1 dimension is defined as the length of the component between the two tapes. The full component length is 62.7mm (2.468"). 316 Series Please refer to for current information Series

234 Introduction to Circuit Protection Transientology 230

235 Axial Lead & Cartridge Fuses 3.6 X 10 mm > Fast-Acting > 874 Series 874 Series Fuse, Lead-free 3.6 x 10 mm, Fast Acting Fuse Description Single Pigtail Axial Lead 3.6 x 10mm Fast-Acting Fuse Features 248 Standard Lead format body fuse in a compact package Compliant 0.10 to 10 Amperes Agency Agency File Number Ampere Range Agency Approvals E A - 10 A Applications This space saving fuse is ideally suited for lighting, power supply, and adapter applications. Electrical Characteristics % of Ampere Opening Time % 4 hours, Minimum 200% 5 seconds, Maximum Electrical Characteristics Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x VAC x x x x x x x x x x x x x Notes: Cold resistance measured at less than 10% of rated current at 23ºC. 874 Series Please refer to for current information. 231 Revised: Feb 3, Series

236 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 3.6 X 10 mm > Fast-Acting Transientology > 874 Series Temperature Rerating Curve Average Time Current Curves 0 10 TIME IN SECONDS Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) A.125A.200A.250A.300A.400A.500A.600A.750A.800A 1A 1.5A 1.6A 2A 2.5A 3.15A 4A 4.5A 5A 6A 6.3A 6.5A 7A 8A 10A CURRENT IN AMPS Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 874 Series 232 Please refer to for current information.

237 Axial Lead & Cartridge Fuses 3.6 X 10 mm > Fast-Acting > 874 Series Product Characteristics Materials Terminal Strength Solderability Product Marketing Packaging Body: Ceramic Cap: Nickel Plated Brass Tin Plated Copper MIL-STD-202F Method 211A, Test Condition A Reference IEC Second Edition Annex A Body: Brand Logo, Current Characteristic F, Agency approval marks Bulk (0 pcs/pkg) Tape & Reel (0 pcs/reel) Operating Temperature -55ºC to 125ºC Thermal Shock Vibration Humidty Salt Spray MIL-STD-202F, Method 107G Test Condition B3 (5 cycles -65ºC to +125ºC) MIL-STD-202F, Method 201A (10-55 Hz) MIL-STD-202, Method 106, High Humidity (90-98%RH), Heat (65ºC) MIL-STD-202F, Method 101D, Test Condition B Dimensions Part Numbering System 0874 xxxx M X E P Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Option Code E = Axial Leaded Lead-free P = Lead-Free Others = Special Options Please call Littelfuse for detail Packaging All dimensions in mm Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 874 Series Bulk Bulk 0 MXE N/A Tape and Reel EIA MRET1 T1 = 52mm (2.062 ) 874 Series Please refer to for current information Series

238 Introduction to Circuit Protection Transientology 234

239 Axial Lead & Cartridge Fuses 3.6 X 10 mm > Slo-Blo > 875 Series 875 Series Fuse, Lead-free 3.6 x 10 mm, Slo-Blo Fuse Description Single Pigtail Axial Lead 3.6x10mm, Slo-Blo Fuse Features 248 Standard Lead format Agency Agency File Number Ampere Range fuse in a compact package Compliant 0.10 to 10 Amperes E A - 10 A Applications This space saving fuse is ideally suited for lighting, power supply, and adapter applications. Electrical Characteristics % of Ampere Opening Time % 4 hours, Minimum 200% 60 seconds, Maximum Electrical Characteristics Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x VAC x x x x x x x x x x x 875 Series Notes: Cold resistance measured at less than 10% of rated current at 23ºC. Please refer to for current information. 235 Revised: Feb 3, Series

240 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 3.6 X 10 mm > Slo-Blo Transientology > 875 Series Temperature Rerating Curve Average Time Current Curves 0 10 TIME IN SECONDS Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) A A A.250A.300A.400A.500A.600A.800A 1A 1.5A 1.6A 2A 2.5A 3A 4A 5A 6A 7A 8A 10A CURRENT IN AMPS Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 875 Series 236 Please refer to for current information.

241 Axial Lead & Cartridge Fuses 3.6 X 10 mm > Slo-Blo > 875 Series Product Characteristics Materials Terminal Strength Solderability Product Marketing Packaging Body: Ceramic Cap: Nickel Plated Brass Tin Plated Copper MIL-STD-202F Method 211A, Test Condition A Reference IEC Second Edition Annex A Body: Brand Logo, Current Characteristic T, Agency approval marks Bulk (0 pcs/pkg) Tape & Reel (0 pcs/reel) Operating Temperature -55ºC to 125ºC Thermal Shock Vibration Humidty Salt Spray MIL-STD-202F, Method 107G Test Condition B3 (5 cycles -65ºC to +125ºC) MIL-STD-202F, Method 201A (10-55 Hz) MIL-STD-202, Method 106, High Humidity (90-98%RH), Heat (65ºC) MIL-STD-202F, Method 101D, Test Condition B Dimensions Part Numbering System 0875 xxxx M X E P All dimensions in mm Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Option Code E = Axial Leaded Lead-free P = Lead-Free Others = Special Options Please call Littelfuse for detail Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 875 Series Bulk Bulk 0 MXE N/A Tape and Reel EIA MRET1 T1 = 52mm (2.062 ) 875 Series Please refer to for current information Series

242 Introduction to Circuit Protection Transientology 238

243 Axial Lead & Cartridge Fuses 3.6 X 10 mm > Fast-Acting > 876 Series 876 Series Fuse, Lead-free 3.6 x 10 mm, Fast Acting Fuse Description Single Pigtail Axial Lead 3.6 x 10mm Fast-Acting Fuse Features Agency Agency File Number Ampere Range E A 1.6 5A A IEC Standard Sheet 3 body fuse in a compact package Applications Lead format compliant.125 to 5 Amperes power supply, and adapter applications. Electrical Characteristics % of Ampere Opening Time 150% 60 minutes, Minimum 210% 30 minutes, Maximum 275% 10 ms., Min.; 3 sec. Max. 400% 3 ms., Min.; 300 ms. Max. 0% 20 ms. Max. Electrical Characteristics Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nominal Voltage Drop (mv) Nominal Power Dissipation (mw) Agency Approvals V AC x x V AC x x V AC x x V AC x x V AC x x V AC x x V AC x x V AC x x 876 Series Notes: Cold resistance measured at less than 10% of rated current at 23ºC. Please refer to for current information. 239 Revised: Feb 3, Series

244 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 3.6 X 10 mm > Fast-Acting Transientology > 876 Series Temperature Rerating Curve Average Time Current Curves 0.125A.160A.250A.630A 1.6A 2A 4A 5A 10 TIME IN SECONDS CURRENT IN AMPS Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 876 Series 240 Please refer to for current information.

245 Axial Lead & Cartridge Fuses 3.6 X 10 mm > Fast-Acting > 876 Series Product Characteristics Materials Terminal Strength Solderability Product Marketing Packaging Body: Ceramic Cap: Nickel Plated Brass Tin Plated Copper MIL-STD-202F Method 211A, Test Condition A Reference IEC Second Edition Annex A Body: Brand Logo, Current Characteristic F, Agency approval marks Bulk (0 pcs/pkg) Tape & Reel (0 pcs/reel) Operating Temperature -55ºC to 125ºC Thermal Shock Vibration Humidty Salt Spray MIL-STD-202F, Method 107G Test Condition B3 (5 cycles -65ºC to +125ºC) MIL-STD-202F, Method 201A (10-55 Hz) MIL-STD-202, Method 106, High Humidity (90-98%RH), Heat (65ºC) MIL-STD-202F, Method 101D, Test Condition B Dimensions Part Numbering System 0876 xxxx M X E P Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Option Code E = Axial Leaded Lead-free P = Lead-Free Others = Special Options Please call Littelfuse for detail Packaging All dimensions in mm Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 876 Series Bulk Bulk 0 MXE N/A Tape and Reel EIA MRET1 T1 = 52mm ( ) 876 Series Please refer to for current information Series

246 Introduction to Circuit Protection Transientology 242

247 Axial Lead & Cartridge Fuses 3.6 X 10 mm > Slo-Blo > 877 Series 877 Series Fuse, Lead-free 3.6 x 10 mm, Slo-Blo Fuse Description Single Pigtail Axial Lead 3.6x10mm, Slo-Blo Fuse Features Agency Agency File Number Ampere Range A 6.3A E A 6.3A IEC Standard Sheet 4 fuse in a compact package Applications Lead format compliant 2 to 6.3 Amperes This space saving fuse is ideally suited for lighting, power supply, and adapter applications. Electrical Characteristics % of Ampere Opening Time 150% 60 minutes, Minimum 210% 2 minutes, Maximum 275% 400 ms., Min.; 10 sec. Max. 400% 150 ms., Min.; 3 sec. Max. 0% 20 ms. Min.; 150 ms. Max. Electrical Characteristics Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nominal Voltage Drop (mv) Nominal Power Dissipation (mw) Agency Approvals V AC x x V AC x x V AC x x V AC x x 877 Series Notes: 1. Cold resistance measured at less than 10% of rated current at 23ºC. Please refer to for current information. 243 Revised: Feb 3, Series

248 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 3.6 X 10 mm > Slo-Blo Transientology > 877 Series Temperature Rerating Curve Average Time Current Curves 0 2A 3.15A 4A 6.3A 10 TIME IN SECONDS CURRENT IN AMPS 0 Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 877 Series 244 Please refer to for current information.

249 Axial Lead & Cartridge Fuses 3.6 X 10 mm > Slo-Blo > 877 Series Product Characteristics Materials Terminal Strength Solderability Product Marketing Packaging Body: Ceramic Cap: Nickel Plated Brass Tin Plated Copper MIL-STD-202F Method 211A, Test Condition A Reference IEC Second Edition Annex A Body: Brand Logo, Current Characteristic T, Agency approval marks Bulk (0 pcs/pkg) Tape & Reel (0 pcs/reel) Operating Temperature -55ºC to 125ºC Thermal Shock Vibration Humidty Salt Spray MIL-STD-202F, Method 107G Test Condition B3 (5 cycles -65ºC to +125ºC) MIL-STD-202F, Method 201A (10-55 Hz) MIL-STD-202, Method 106, High Humidity (90-98%RH), Heat (65ºC) MIL-STD-202F, Method 101D, Test Condition B Dimensions Part Numbering System 0877 xxxx M X E P Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Option Code E = Axial Leaded Lead-free P = Lead-Free Others = Special Options Please call Littelfuse for detail Packaging All dimensions in mm Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 877 Series Bulk Bulk 0 MXE N/A Tape and Reel EIA MRET1 T1 = 52mm (2.062 ) 877 Series Please refer to for current information Series

250 Introduction to Circuit Protection Transientology 246

251 Axial Lead & Cartridge Fuses 208 Series Lead-Free 2AG, Fast-Acting Fuse PS E Description Littelfuse 208 Series (2AG) 350V Fast-Acting Fuses are available in cartridge form or with axial leads. This series provides the same performance characteristics as its 3AG counterpart, while occupying one-third the space. Sleeved fuses are available. Features Agency Approvals Agency Agency File Number Ampere Range with Underwriter s Laboratories Standard UL boardwashable in most solvents and axial lead form and with various lead forming dimensions Lead-free E mA - 10A Applications PS E NBK E10480 C/D NBK E10480 E/F 1A - 5A 6A - 10A applications 125mA - 10A Electrical Characteristics for Series % of Ampere Opening Time % 4 Hours, Min. 135% 1 Hour, Max. 200% 1 Second, Max. Electrical Characteristic Specifications by Item Amp Code Amp Voltage Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x x x x x x x x V AC x x x x x x x x x x x x x x x x x x x x x x x x x x x PS E 208 Series Please refer to for current information. 247 Revised: December 30, Series

252 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Temperature Rerating Curve Average Time Current Curves 1/10A 1/8A 1/4A 3/8A 1/2A 3/4A 1A 1 1/2A 2A 2 1/2A 3A 4A 5A 6A 7A 8A 10A 10 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Preheat Time Dwell Time Cooling Time Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 208 Series 248 Please refer to for current information.

253 Axial Lead & Cartridge Fuses Product Characteristics Materials Terminal Strength Solderability Product Marking Body : Glass Cap : Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1 : Brand logo, current and voltage ratings Cap2 : Series and agency approval marks Operating Temperature: Thermal Shock: Vibration Humidity Salt Spray 55ºC to 125ºC. MIL-STD-202G, Method 107G, Test Condition B (5 Cycles -65ºC to +125ºC). MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A: High RH (95%) and elevated temp (40ºC) for 240 hours MIL-STD-202G, Method 101D, Test Condition B Dimensions P Series EP Series Part Numbering System 0208 xxxx M X E P 4.7 (.184") (.57") 4.7 (.184").635 (.025") (.57") 38.1 (1.50") TYP. Series Current Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Loose Pack Option Codes Blank = Cartridge Type Fuse E = Axial Leaded Fuse Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 208 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape EIA 296-E 1500 DRT1 T1=52mm (2.062 ) 208 Series Please refer to for current information Series

254 Introduction to Circuit Protection Transientology 250

255 Axial Lead & Cartridge Fuses 209 Series Lead-Free 2AG, Slo-Blo (Time-Lag) Fuse PS E Description Littelfuse 209 Series (2AG) 350V, Time-Lag (Slo-Blo ) Fuses are available in cartridge form or with axial leads. This series provides the same performance characteristics as its 3AG counterpart, while occupying one-third the space. Sleeved fuses are available. Features Agency Approvals Agency Agency File Number Ampere Range with Underwriter s Laboratories Standard UL boardwashable in most solvents and axial lead form and with various forming dimensions Lead-free E mA - 1A Applications PS E NBK E10480 G/H 1A 250mA - 1A Electrical Characteristics for Series % of Ampere Opening Time % 4 Hours, Min. 135% 1 Hour, Max. 200% 3 Sec. Min. ; 20 Sec. Max. Electrical Characteristic Specifications by Item Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x Vac x x x x x x x x x PS E 209 Series Please refer to for current information. 251 Revised: Jan 12, Series

256 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Temperature Rerating Curve Average Time Current Curves 0.250A.375A.500A.750A 1.00A TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Preheat Time Dwell Time Cooling Time Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 209 Series 252 Please refer to for current information.

257 Axial Lead & Cartridge Fuses Product Characteristics Materials Terminal Strength Solderability Product Marking Body : Glass Cap : Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1 : Brand logo, current and voltage ratings Cap2 : Series and agency approval marks Operating Temperature: Thermal Shock: Vibration Humidity 55ºC to 125ºC. MIL-STD-202G, Method 107G, Test Condition B (5 Cycles -65ºC to +125ºC). MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A: High RH (95%) and elevated temp (40ºC) for 240 hours Salt Spray MIL-STD-202G, Method 101D, Test Condition B Dimensions P Series EP Series Part Numbering System 0209 xxxx M X E P 4.5 (.177") (.57") 4.7 (.184").635 (.025") (.57") 38.1 (1.50") TYP. Series Current Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Loose Pack Option Codes Blank = Cartridge Type Fuse E = Axial Leaded Fuse Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 209 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape EIA 296-E 1500 DRT1 T1=52mm (2.062 ) 209 Series Please refer to for current information Series

258 Introduction to Circuit Protection Transientology 254

259 Axial Lead & Cartridge Fuses 224/225 Series Lead-Free 2AG, Fast-Acting PS E Description The 2AG Fast-Acting Fuses are available in cartridge form or with axial leads. 2AG Fuses provide the same performance characteristics as their 3AG counterpart, while occupying one-third the space. Sleeved fuses are available. Features Agency Approvals Agency Agency File Number Ampere Range with underwriter s Laboratories Standard UL boardwashable in most solvents and axial lead form and with various forming dimensions Lead-free E10480 ma - 3.5A E A - 10A LR ma - 10A Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. PS E NBK E10480 NBK E10480 Cartridge: 1A - 10A Pigtail: 1A - 10A Electrical Characteristics for Series Amp Code Ampere (A) Voltage (V) ma - 10A Electrical Characteristic Specifications by Item Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) % of Ampere Opening Time % 4 hours, Minimum 135% 1 hour, Maximum 200% 1 sec., Maximum Agency Approvals x x x x x x x x x 35A@250Vac x x x 10KA@125Vac x x x 10KA@125Vdc x x x x x x x x x x x x x x x A@250Vac x x x x 10KA@125Vac x x x x 10KA@125Vdc x x x x x x x x A@250Vac x x x x 500A@125Vac x x x x x x x x x x x 500A@125Vac x x x x x x x x PS E 224/225 Series * 10A with 125 Vdc internal breaking capacity testing. Please refer to or /225.html for current information. 255 Revised: Jan 12, /225 Series

260 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Temperature Rerating Curve Average Time Current Curves.A.125A.250A.375A.500A.750A 1.00A 1.50A 2.00A 2.50A 3A 4A 5A 6A 7A 8A 10A 10 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 224/225 Series 256 Please refer to or /225.html for current information.

261 Axial Lead & Cartridge Fuses Product Characteristics Materials Terminal Strength Solderability Product Marking Body : Glass Cap : Nickel plated brass Leads: Tin plated Copper MIL-STD-202F Method 211A, Test Condition A Reference IEC 6012/Second Edition Annex A Cap1 : Brand logo, current and Voltage s Cap2 : Series and Agency approval Mark Operating Temperature: Thermal Shock: Vibration 55ºC to +125ºC MIL-STD-202F, Method 107G, Test Condition B (5 Cycles -65ºC to +125ºC). MIL-STD-202F, Method 201A Humidity MIL-STD-202F Method 103B, Test Condition A: High RH (95%) and elevated temp (40ºC) for 240 hours Salt Spray MIL-STD-202F Method 101D, Test Condition B Dimensions Part Numbering System P Series P Series 0224 xxxx M X P 4.5 (.177") (.57") 4.7 (.184").635 (.025") (.57") 38.1 (1.50") TYP. Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Lead-free 224/225 Series Please refer to or /225.html for current information /225 Series

262 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 224 Series Bulk N/A 5 VX N/A Bulk N/A 5 VXU N/A Bulk N/A HX N/A Bulk N/A HXU N/A Bulk N/A 0 MX N/A Bulk N/A 0 MX250U N/A Bulk N/A 0 MXF16 N/A Bulk N/A 0 MXF23 N/A Bulk N/A 0 MXU N/A Reel and Tape EIA 296-E 1500 DRT1 T1=52mm (2.062 ) Reel and Tape EIA 296-E 1500 DRT1U T1=52mm (2.062 ) Reel and Tape EIA 296-E 1500 DRT2 T2=63mm (2.500 ) Reel and Tape EIA 296-E 1500 DRT3 T3=73mm (2.874 ) Reel and Tape EIA 296-E 2500 ERT1 T1=52mm (2.062 ) Reel and Tape EIA 296-E 2500 ERT2 T2=63mm (2.500 ) Reel and Tape EIA 296-E 2500 ERT3 T3=73mm (2.874 ) Bulk N/A 0 MX50LE N/A 225 Series Bulk N/A 5 VX N/A Bulk N/A 5 VXU N/A Bulk N/A HX N/A Bulk N/A HXU N/A Bulk N/A 0 MX N/A Bulk N/A 0 MXU N/A 224/225 Series 258 Please refer to or /225.html for current information.

263 Axial Lead & Cartridge Fuses 229/230 Series Lead-Free 2AG, Slo-Blo Fuse and Indicating Slo-Blo Fuse PS E Description The 2AG Slo-Blo Fuses are available in cartridge form or with axial leads. 2AG Fuses provide the same performance characteristics as their 3AG counterpart, while occupying one-third the space. Agency Approvals Agency Agency File Number Ampere Range E mA - 3.5A LR E10480 PS NBK E E10480D/F/G/H 250mA - 7A 4A - 7A 1A - 7A The fuse catalog number with the suffix S instantly identifies itself upon opening by showing a discoloration of its glass body. Guesswork and time consuming circuit testing are eliminated. This unique design offers the same quality performance characteristics as the standard 2AG Slo-Blo fuse design. When ordering the 2AG Indicating Slo-Blo Fuse, an 'S' is required after the catalog number. Features Standard boradwashable in most solvents Lead-free and axial lead form and with various lead forming dimensions available Electrical Characteristics for Series % of Ampere Opening Time 250mA - 7A % 4 hours, Minimum 135% 1 hour, Maximum 200% 3 sec.onds, Maximum 20 seconds, Maximum Applications Standard 229/230 series meets the demanding requirements of the Telecom Industry. These fuses combine conventional overcurrent protection with ability to withstand high current, short duration pulses which complies to short circuit requirements of UL 1459 for Telecom equipments. 229/230 Series Please refer to or /230.html for current information. 259 Revised: Feb 25, /230 Series

264 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Electrical Characteristic Specification by Item Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals PS E x x x x x x x x x 35A@250Vac KA@125Vac x x x KA@125Vdc x x x 80A@310Vac x x x x x x x x x x x x x x x x x x A@250Vac KA@125Vac x x x x KA@125Vdc x x x x 80A@310Vac x x x x x x x x A@250Vac 10KA@125Vac 10KA@125Vdc x x x x x x x x A@125Vac x x x x A@125Vdc x x x x x x x x 229/230 Series 260 Please refer to or /230.html for current information.

265 Axial Lead & Cartridge Fuses Description Standard 229 and 230 Series Slo-Blo fuses meet the demanding requirements of the Telecom industry. These fuses combine conventional overcurrent protection with the ability to withstand high current, short duration pulses. These fuses comply with the short circuit requirements of UL 1459 for telephone equipment. Insulating sleeve option available. Features In accordance with underwriter s Laboratories Standard UL Fuses are boardwashable in most solvents. Available in cartridge and axial lead from and with various lead forming dimensions. RoHS compliant and lead-free. Available in ratings from 250mA to 1.25A. Applications Used for the telecom industry. Surge Withstand Specificatons Peak Withstand Current(lp): These fuses will withstand 50 repetitions of a double exponential impulse wave having peak currents(lp) and peak voltages as listed. Amp Code Ampere (A) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) 10 x 160 μs 1500V 10 x 560 μs 800V 10 x 0 μs 0V A 16.6A 12.4A A 25.8A 19.3A A 25.4A 19.0A A@600Vac A 37.7A 28.2A 40A@600Vac A 47.2A 35.3A 7A@600Vac A@600Vac A 65.5A 49.0A A 68.9A 51.6A A 88.6A 66.3A * A 118.1A.0A * 500A peak, 2500V, 2 x 10 microseconds, 20 repetitions 229/230 Series Please refer to or /230.html for current information /230 Series

266 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Temperature Rerating Curve Average Time Current Curves 0.250A.375A.500A.750A 1.00A 1.50A 2.0A 2.5A 3.0A 3.5A 4A 5A 7A TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 229/230 Series 262 Please refer to or /230.html for current information.

267 Axial Lead & Cartridge Fuses Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Glass Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1: Cap2: Brand logo, current and voltage ratings Series and agency approval marks Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles - -65ºC to 125ºC) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A: High RH (95%) and Elevated temperature(40ºc) for 240 hours MIL-STD-202G, Method 101D, Test Condition B Dimensions Part Numbering System 4.5 (.177") P Series P Series (.57") Axial Lead Material: Solder coated Copper. 4.7 (.184").635 (.025") (.57") 38.1 (1.50") TYP. Series Quantity Code M = 0 Packaging Code X = Filler Lead-free 0229 xxxx M X P Amp Code Refer to Amp Code column of Electrical Characteristics Table 229/230 Series Please refer to or /230.html for current information /230 Series

268 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 229 Series Bulk N/A 5 VX N/A Bulk N/A 5 VXS N/A Bulk N/A HX N/A Bulk N/A HXS N/A Bulk N/A 0 MX N/A Bulk N/A 0 MXS N/A 230 Series Bulk N/A 5 VX N/A Bulk N/A 5 VXS N/A Bulk N/A HX N/A Bulk N/A HXS N/A Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Bulk N/A 0 MXF1 N/A Bulk N/A 0 MXF16 N/A Bulk N/A 0 MXF16O N/A Bulk N/A 0 MXF17 N/A Bulk N/A 0 MXF17O N/A Bulk N/A 0 MXF23 N/A Bulk N/A 0 MXF23O N/A Bulk N/A 0 MXF32 N/A Bulk N/A 0 MXO N/A Bulk N/A 0 MXS N/A Reel and Tape EIA 296-E 1500 DRT2 T2=63mm (2.500 ) Reel and Tape EIA 296-E 1500 DRT2S T2=63mm (2.500 ) Reel and Tape EIA 296-E 1500 DRT4 N/A Reel and Tape EIA 296-E 2500 ERT2 T2=63mm (2.500 ) Reel and Tape EIA 296-E 2500 ERT2S T2=63mm (2.500 ) Reel and Tape EIA 296-E 0 MRT1E T1=52mm (2.062 ) Reel and Tape EIA 296-E 1500 DAT1 T1=52mm (2.062 ) Reel and Tape EIA 296-E 1500 DAT1O T1=52mm (2.062 ) Reel and Tape EIA 296-E 1500 DRT1 T1=52mm (2.062 ) Reel and Tape EIA 296-E 1500 DRT1S T1=52mm (2.062 ) Reel and Tape EIA 296-E 1500 DRT1SS T1=52mm (2.062 ) Reel and Tape EIA 296-E 1500 DRT3 T3=73mm (2.874 ) Reel and Tape EIA 296-E 1500 DRT3S T3=73mm (2.874 ) Reel and Tape EIA 296-E 2500 ERT1 T1=52mm (2.062 ) Reel and Tape EIA 296-E 2500 ERT1S T1=52mm (2.062 ) Reel and Tape EIA 296-E 2500 ERT3 T3=73mm (2.874 ) Reel and Tape EIA 296-E 2500 ERT3S T3=73mm (2.874 ) 229/230 Series 264 Please refer to or /230.html for current information.

269 Axial Lead & Cartridge Fuses 5 20 mm > Fast-Acting > 217 Series 217 Series, 5 x 20 mm, Fast-acting Fuse PS E Description 5x20mm fast-acting glass body cartridge fuse designed to IEC specification. Features Agency Approvals International (IEC ) Standards for use globally , Sheet 2 specification for fastacting fuses and axial lead form lead-free Agency Agency File Number Ampere Range PS E Cartridge Certificates: NBK E10480 A&C Leaded Certificates: NBK E10480 B&D Certificates: Certificates: SU SU SU SU E10480 JDYX2 File: Acc. Class: LR License: KM41462 File: , , & License: License: A 5A 6.3A 15A 1A 5A 6.3A 15A 32mA 800mA 1A 6.3A 32mA 40mA 50mA 315mA 400mA 6.3A 8A & 10A 32mA 6.3A 400mA 6.3A 32mA 6.3A 32mA 6.3A, 8A*, 10A* 15A* 32mA 15A Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere 150% 210% 275% 400% 0% Ampere 32mA ma 125mA-6.3A 8A-15A 32mA-mA 125mA-6.3A 8A-15A 32mA-mA 125mA-6.3A 8A-15A 32mA-mA 125mA-6.3A 8A-15A 32mA-mA 125mA-6.3A 8A-15A Opening Time 60 minutes, Minimum 60 minutes, Minimum 30 minutes, Minimum 30 minutes, Maximum 30 minutes, Maximum 30 minutes, Maximum 0.01 sec., Min.;.5 sec. Max sec., Min.; 2 sec. Max sec., Min.; 2 sec. Max..003 sec., Min.; 0.1 sec.. Max..01 sec., Min.; 0.3 sec. Max..01 sec., Min.; 0.4 sec. Max..02 second, Maximum.02 second, Maximum.04 second, Maximum 217 Series *Approval for cartridge versions only Please refer to for current information. 265 Revised: February 1, Series

270 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Fast-Acting Transientology > 217 Series Electrical Characteristic Specifications by Item Amp Code Amp (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nominal Voltage Drop at Rated Current (mv) Nominal Power Dissipation At Rated Current (W) PS E Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac x x x x x x x x x A@250Vac x x x x x x x x x A@250Vac x x x x x x x x x A@250Vac x x x x* A@250Vac x x x x* A@250Vac x x x* * Approval for cartidge versions only. Temperature Rerating Curve Average Time Current Curves 0.032A 0.040A 0.050A 0.063A 0.080A 0.A 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1A 1.25A 1.6A 2A 2.5A 3.15A 4A 5A 6.3A 8A 10A 15A 00 0 TIME IN SECONDS CURRENT IN AMPERES 217 Series 266 Please refer to for current information.

271 Axial Lead & Cartridge Fuses 5 20 mm > Fast-Acting > 217 Series Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Product Characteristics Material Terminal Strength Solderability Product Marking Packaging Body: Glass Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1: Brand logo, current and voltage ratings Cap2: Agency approval marks Available in Bulk (M=0 pcs/pkg) or on Tape/Reel (MRET1=0 pcs/ reel) Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55 O C to +125 O C MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65 C to +125 C) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A. high RH (95%) and elevated temperature (40 C) for 240 hours. MIL-STD-202G, Method 101D, Test Condition B 217 Series Please refer to for current information Series

272 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Fast-Acting Transientology > 217 Series Dimensions Part Numbering System P XEP to XEP MAX ø MAX Series 0217 xxxx M X E P Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler XEP to XEP MAX ø0.65* 5.8 MAX Option Codes Blank = Cartridge Type Fuse E = Axial Leaded Fuse Lead-free All dimensions in mm Notes: * s above 6.3A have 0.8 mm dia lead Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape EIA 296-E 0 MRET1 T1=52mm (2.062 ) 217 Series 268 Please refer to for current information.

273 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 218 Series 218 Series, 5 x 20 mm, Time-Lag (Slo-Blo ) Fuse PS E Description 5x20mm Time-Lag glass body cartridge fuse designed to IEC specification. Features Agency Approvals Agency Agency File Number Ampere Range PS E Cartridge Certificates: NBK E10480 A&C Leaded Certificates: NBK E10480 B&D Certificates: Certificates: SU SU SU Recognised File: E10480 Guide: JDYX2 File: Acc. Class: LR License: KM41462 File: , , , , License: License: * Approval for Cartridge versions only 1A 5A 6.3A 15A 32mA 6.3A 32mA 40mA 50mA 800mA 1A 10A 32mA 16A 32mA 15A 80mA 6.3A 32mA 6.3A 32mA 10A 15A* 32mA 16A International (IEC ) Standards for use globally , Sheet 3 Applications Electrical Characteristics specification for Time- Lag fuses and axial lead form lead-free Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. % of Ampere 150% 210% 275% 400% 0% Ampere 32mA ma 125mA-6.3A 8A-15A 32mA-mA 125mA-6.3A 8A-15A 32mA-mA 125mA-6.3A 8A-15A 32mA-mA 125mA-6.3A 8A-15A 32mA-mA 125mA-6.3A 8A-15A Opening Time 60 minutes, Minimum 60 minutes, Minimum 30 minutes, Minimum 120 sec., Maximum 120 sec., Maximum 120 sec., Maximum 200 ms., Min.; 10 sec. Max. 600 ms., Min.; 10 sec. Max. 600 ms., Min.; 10 sec. Max. 40 ms., Min.; 3 sec. Max. 150 ms., Min.; 3 sec. Max. 150 ms., Min.; 3 sec. Max. 10 ms., Min.; 300 ms. Max. 20 ms., Min.; 300 ms. Max. 20 ms., Min.; 300 ms. Max. 218 Series Please refer to for current information. 269 Revised: July 28, Series

274 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time-Lag Transientology > 218 Series Electrical Characteristics Amp Code Amp (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nominal Voltage Drop at Rated Current (mv) Nominal Power Dissipation At Rated Current (W) PS E Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x VAC x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x VAC x x x x x x x x x VAC x x x x x x x x x VAC x x x x x x x x x VAC x x x x x x VAC x x x x x x VAC x x VAC x x x x* VAC x x * Approval for cartidge versions only Temperature Rerating Curve Average Time Current Curves 0.032A 0.040A 0.050A 0.063A 0.080A 0.A 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1A 1.25A 1.6A 2A 2.5A 3.15A 4A 5A 6.3A 8A 10A 12.5A 15A 16A 00 0 TIME IN SECONDS CURRENT IN AMPERES 218 Series 270 Please refer to for current information.

275 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 218 Series Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Product Characteristics Material Terminal Strength Solderability Product Marking Packaging Body: Glass Cap: Nickel plated Brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1: Brand logo, current and voltage ratings Cap2: Agency approval marks Available in Bulk (M=0 pcs/pkg) or on Tape/Reel (MRET1=0 pcs/ reel) Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B (5 cycles, 65 C to +125 C) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A (High RH (95%) and elevated temperature (40 C) for 240 hours) MIL-STD-202G, Method 101D, Test Condition B 218 Series Please refer to for current information Series

276 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time-Lag Transientology > 218 Series Dimensions Part Numbering System xxxx M X E P P Series XEP to 0218.XEP MAX MAX Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler XEP to XEP MAX 0.65* 5.8 MAX Option Codes Blank : Cartidge Type Fuse E : Axial Lead Fuse Lead-free All dimensions in mm Notes: * s above 6.3A have 0.8 mm dia lead Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape EIA 296-E 0 MRET1 T1=52mm (2.062 ) 218 Series 272 Please refer to for current information.

277 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 213 Series 213 Series, 5 x 20 mm, Time-Lag (Slo-Blo ) Fuse PS E Description 5x20mm time-lag surge withstand glass body cartridge fuse designed to IEC specification. Features International (IEC ) Standards for use globally , Sheet 3 specification for time- Lag fuses Agency Approvals and axial lead form lead-free. Agency Agency File Number Ampere Range PS E Cartridge Certificates: NBK E10480 A&C Leaded Certificates: NBK E10480 B&D Certificates: Recognised File: E10480 Guide: JDYX2 File: Acc. Class: LR License: KM41462 File: , License: A 5A 6.3A 200mA 6.3A 5A 200mA 6.3A 200mA 4A, 6.3A 200mA 6.3A Electrical Characteristic Specifications by Item Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristic for Series % of Ampere Ampere Opening Time 150% 60 minutes, Minimum 210% 2 minutes, Maximum 275% All s 0.6 sec., Min.; 10 sec. Max. 400%.15 sec., Min.; 3 sec. Max. 0% 0.02 sec., Min.; 0.3 sec. Max. 213 Series Amp Code Ampere Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nominal Voltage Drop (mv) Nominal Power Dissipation (W) PS E Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac x x x x x x x x A@250Vac x x x x x x x x A@250Vac x x x x x x x x Please refer to for current information. 273 Revised: February 1, Series

278 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time-Lag Transientology > 213 Series Temperature Rerating Curve Average Time Current Curves 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1A 1.25A 1.6A 2A 2.5A 3.15A 4A 5A 6.3A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 213 Series 274 Please refer to for current information.

279 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 213 Series Product Characteristics Material Terminal Strength Solderability Product Marking Packaging Body: Glass Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC 60127, Second Edition , Annex A Cap1: Brand logo, current and voltage Cap2: Agency approval marks Series Available in Bulk (M=0 pcs/pkg) or on Tape/Reel (MRET1=0 pcs/reel) Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65 C to +125 C) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A. High RH (95%) and elevated temperature (40 C) for 240 hours. MIL-STD-202G, Method 101D, Test Condition B Dimensions Part Numbering System P Series 0213 xxxx M X E P Amp Code Refer to Amp Code column of Electrical Characteristics Table XEP MAX 5.8 MAX Quantity Code M = 0 Packaging Code 0.65 X = Filler Notes: * s above 6.3A have 0.8 mm dia lead All dimensions in mm Option Codes Blank : Cartidge Type Fuse E : Axial Leaded Fuse Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 213 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape EIA 296-E 0 MRET1 T1=52mm (2.062 ) 213 Series Please refer to for current information Series

280 Introduction to Circuit Protection Transientology 276

281 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 219XA Series 219XA Series, 5x20mm, Time-Lag (Slo-Blo ) Fuse PS E Description 5x20mm time-lag glass body cartridge fuse designed to IEC specification Features Agency Approvals International (IEC ) Standards for use globally , Sheet 6 specification for time- Lag fuses and axial lead form lead-free Agency Agency File Number Ampere Range Applications PS E Cartridge Certifications: NBK E10480A NBK E10480A Leaded Certifications: NBK E10480B NBK E10480B Certifications: A 5A 6.3A 1A 5A 6.3A 125mA 800mA 1A 6.3A Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere Ampere Opening Time Recognised File: E10480 Guide: JDYX2 File and Acc. Class: _0_000 License: KM41462 File: / License: mA 6.3A 125mA 6.3A 40mA ma 125mA 800mA 1A 6.3A 125mA 6.3A 150% 210% 275% 400% 0% 40mA ma 125mA 6.3A 40mA ma 125mA 6.3A 40mA ma 125mA 6.3A 40mA ma 125mA 6.3A 40mA ma 125mA 6.3A 1 hours, Minimum 1 hours, Minimum 2 minutes, Maximum 2 minutes, Maximum 0.2 sec., Min; 10 sec. Max 0.6 sec., Min; 10 sec. Max 0.04 sec., Min; 3 sec. Max.15 sec., Min; 3 sec. Max.01 sec., Min; 0.3 sec. Max.02 sec., Min; 0.3 sec. Max 219XA Series 40mA 6.3A Please refer to for current information. 277 Revised: Jan 12, XA Series

282 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time-Lag > Transientology 219XA Series Electrical Characteristic Specifications by Item Amp Code Amp (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nominal Voltage Drop at Rated Current (mv) Nominal Power Dissipation at Rated Current (W) PS E Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x VAC x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 219XA Series 278 Please refer to for current information.

283 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 219XA Series Temperature Rerating Curve Average Time Current Curves 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 0.500A 0.630A 0.800A 1A 1.25A 1.6A 2A 2.5A 3.15A 4A 5A 6.3A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: 219XA Series Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Please refer to for current information XA Series

284 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time-Lag > Transientology 219XA Series Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Glass Cap: Nickel Plated Brass Leads: Tin Plated Copper MIL-STD-202G, Method 211A. Test Condition A Reference IEC Second Edition Annex A Cap 1: Brand logo, current and voltage rating Cap 2: Agency approval markings Series Operating Temperature Shock Vibration Humidity 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65 O C to +125 O C) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A high RH (95%) and elevated temperature (40 O C) for 240 hours. Packaging Available in Bulk (M=0 pcs/pkg) or on Tape/Reel (MRET1=0 pcs/reel) Salt Spray MIL-STD-202F Method 101D, Test Condition B Dimensions Part Numbering System XAP Series 0219 xxxx M XA E P XAEP MAX 0.65* 5.8 MAX Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Notes: * s above 6.3A have 0.8 mm dia lead All dimensions in mm Packaging Code X = Filler A = Enhanced l sq t Option Codes Blank : Cartidge Type Fuse E : Axial Leaded Fuse Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 219XA Series Bulk N/A 0 MXA N/A Bulk N/A 0 MXAE N/A Reel and Tape N/A 0 MRAET1 T1=52mm (2.062 ) 219XA Series 280 Please refer to for current information.

285 Axial Lead & Cartridge Fuses 5 20 mm > Fast-Acting > 216 Series 216 Series, 5 x 20 mm, Fast-Acting Fuse PS E Description 5x20mm fast-acting ceramic body cartridge fuse designed to IEC specification. Features Agency Approvals Agency Agency File Number Ampere Range PS E Cartridge Certificates: NBK2508\702-E10480 A&C NBK E10480 E Leaded Certificates: NBK E10480 B & D NBK E10480 F Certificates: Certificates: SU Recognised File: E10480 Guide: JDYX2 File: Acc. Class: LR License: KM41462 File: , and , License: License: A 10A 50mA 800mA 1A - 6.3A 1A - 10A 50mA 10A 12.5A, 16A 1A 6.3A 50mA 6.3A 8A&10A,16A 50mA 6.3A *8A, *10A *12.5A 50mA 16A International (IEC ) Standards for use globally 2, sheet 1 specification Applications Electrical Characteristics for Series % of Ampere 150% 210% 275% 400% Ampere 50mA 4A 5A 6.3A 8A 16A 50mA 4A 5A 6.3A 8A 16A 50mA 4A 5A 6.3A 8A 16A 50mA 4A 5A 6.3A 8A 16A for fast-acting fuses and axial lead form lead-free Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. 0% 50mA 4A 5A 6.3A 8A 16A Opening Time 60 minutes, Minimum 60 minutes, Minimum 30 minutes, Minimum 30 minutes, Maximum 30 minutes, Maximum 30 minutes, Maximum 0.01 sec.., Min.; 2 sec. Max sec.., Min.; 3 sec. Max sec., Min.; 20 sec. Max..003 sec., Min.; 0.3 sec. Max..003 sec., Min.; 0.3 sec. Max..01 sec.., Min.; 1.0 sec. Max..02 seconds, Maximum.02 seconds, Maximum.03 sec.onds, Maximum 216 Series *Approval for Cartridge versions only Please refer to for current information. 281 Revised: Jan 12, Series

286 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Fast-Acting Transientology > 216 Series Electrical Characteristics Specifications by Item Amp Code Amp (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nominal Voltage Drop at Rated Current (mv) Nominal Power Dissapation at Rated Current (W) Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x* x x x x x x x* x x x x x* A@250Vac x x x x * Approval for cartidge versions only. PS E Temperature Rerating Curve Average Time Current Curves 0.050A 0.063A 0.080A 0.A 0.125A 0.160A 0.200A 0.250A 0.315A 0.400A 1A 0.500A 0.630A 0.800A 1.25A 1.6A 2A 4A 2.5A 3.15A 5A 6.3A 8A 10A 12.5A 16A 00 0 TIME IN SECONDS CURRENT IN AMPERES 216 Series 282 Please refer to for current information.

287 Axial Lead & Cartridge Fuses 5 20 mm > Fast-Acting > 216 Series Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Product Characteristics Material Terminal Strength Solderability Product Marking Packaging Body: Ceramic Cap: Nickel plated brass Leads: Tin plated Copper Filler (160mA-16A): Sand MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap 1: Brand logo, current and volage rating Cap 2: Agency approval markings Available in Bulk (M=0 pcs/pkg) or on Tape/Reel (MRET1=0 pcs/ reel) Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65 C to +125 C) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A. high RH (95%) and elevated temperature (40 C) for 240 hours. MIL-STD-202G, Method 101D, Test Condition B 216 Series Please refer to for current information Series

288 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Fast-Acting Transientology > 216 Series Dimensions Part Numbering System XP Series 0216 xxxx M X E P XEP to XEP MAX 6.0 MAX Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler XEP to XEP 0.65** MAX All dimensions in mm ** s above 6.3A have 0.8 mm diameter lead 5.8 MAX Option Codes Blank : Cartidge Type Fuse E : Axial Leaded Fuse Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 216 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape EIA 296-E 0 MRET1 T1=52mm (2.062 ) 216 Series 284 Please refer to for current information.

289 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 215 Series 215 Series, 5 x 20 mm, Time-Lag (Slo-Blo ) Fuse PS E Description 5x20mm Time-Lag surge withstand ceramic body cartridge fuse designed to IEC specification Features International (IEC ) Standards for use globally , Sheet 5 specification for Time- Lag fuses lead-free Agency Approvals Applications Agency Agency File Number Ampere Range PS E. Cartridge Certificates: NBK E10480A NBK E10480E NBK408-JP1021A Leaded Certificates: NBK E10480B NBK E10480F NBK408-JP1021B Certificates: Certificates: SU SU Recognised File: E10480 File: Acc. Class: LR License: KM41462 License: License: License: * Approved for cartridge versions only 1A 5A 6.3A 15A 16A 20A 1A 5A 6.3A 15A 16A 20A 1A 6.3A 1A 3.15A 4A 10A 125mA 160mA 500mA 20A 500mA 12A 200mA 10A 125mA, 160mA 200mA 800mA, 8A, 10A 1A 3.15A 4A 6.3A 12A *15A *20A 200mA 8A *10A *12A 125mA 20A Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere 150% 210% 275% 400% 0% Ampere 125mA 800mA 1A 3.15A 4A 6.3A 8A 20A 125mA 800mA 1A 3.15A 4A 6.3A 8A 12A 125mA 800mA 1A 3.15A 4A 6.3A 8A 20A 125mA 800mA 1A 3.15A 4A 6.3A 8A 20A 125mA 800mA 1A 3.15A 4A 6.3A 8A 20A Opening Time 60 minutes, Minimum 60 minutes, Minimum 60 minutes, Minimum 30 minutes, Minimum 30 minutes, Maximum 30 minutes, Maximum 30 minutes, Maximum 30 minutes, Maximum.25 sec. Min.; 80 secs. Max..75 sec. Min.; 80 secs. Max..75 sec. Min.; 80 secs. Max..75 sec. Min.; 80 secs. Max..05 sec., Min.; 5 secs. Max..095 sec., Min.; 5 secs. Max..150 sec., Min.; 5 secs. Max..150 sec., Min.; 5 secs. Max..005 sec., Min.;.150 sec. Max..010 sec., Min.;.150 sec. Max..010 sec., Min.;.150 sec. Max..010 sec., Min.;.150 sec. Max. 215 Series Please refer to for current information. 285 Revised: December 30, Series

290 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time-Lag Transientology > 215 Series Electrical Characteristic Specifications by Item Amp Code Nominal Voltage Amp Interrupting Cold Resistance (V) (Ohms) Nominal Melting I 2 t (A 2 sec) Maximum Maximum Voltage Drop Power at Rated Dissipation at Current Rated Current (mv) (W) PS E Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x VAC x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x* x x x x x x* x TBA** TBA** x x x* 500 A TBA** TBA** x x x* A TBA** TBA** x x x* X* Approval for cartridge versions only TBA** - Please contact Littelfuse for details on these parameters 1A to 2A have an IR : A@500VAC, 4A to 6-3A have the IR : A@305 VAC and 0A@72VDC Temperature Rerating Curve 215 Series 286 Please refer to for current information.

291 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 215 Series Average Time Current Curves T-C Curves for 125mA to 800mA only T-C Curves for 1A to 20A only A.160 A.200 A.250 A.315 A.400 A.500 A.630 A.800 A A 1.25 A 1.60 A 2.00 A 2.50 A 3.15 A 4.00 A 5.00 A 6.30 A 8.00 A 10.0 A 12.0 A 15.0 A 16.0 A 20.0 A 0 0 TIME IN SECONDS 10 1 TIME IN SECONDS CURRENT IN AMPERES CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: 215 Series Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Please refer to for current information Series

292 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time-Lag Transientology > 215 Series Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Ceramic Cap: Nickel plated Brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap 1: Brand logo, current and voltage ratings Cap 2: Agency approval markings Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B (5 cycles, 65ºC to +125ºC) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A (High RH (95%) and elevated temp (40ºC) for 240 hours) MIL-STD-202G, Method 101D, Test Condition B Dimensions Part Numbering System 0215 xxxx M X E P P to P XEP to XEP XEP to XEP * s above 6.3 A have 0.8 mm diameter lead; ratings above 12 A have 1.2 mm diameter lead Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Option Codes Blank : Cartidge Type Fuse E : Axial Lead Fuse Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 215 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape N/A 0 MRET1 T1=52mm (2.062 ) 215 Series 288 Please refer to for current information.

293 Axial Lead & Cartridge Fuses 5 20 mm > Medium-Acting > 232 Series 232 Series, 5 x 20 mm, Medium-Acting Fuse PS E Description 5x20mm medium acting glass body cartridge fuse designed to Meti B Standard. Features Standard JIS C6575 lead-free and axial lead format Agency Approvals Agency Agency File Number Ampere Range PS E Cartridge Certificates: NBK E10480 B NBK E10480 D Leaded Certificates: NBK E10480 B NBK E10480 F Certificates: SU A 5A 6.3A 10A 1A 5A 6.3A 10A 1A 10A 1A 10A Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere Opening Time 130% 1 hour, Minimum 160% 1 hour, Maximum 200% 2 minutes, Maximum Electrical Characteristic Specifications by Item Amp Code Amp (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) PS E Agency Approvals / x x x / x x x / x x x / x x x / VAC x x x / x x x / x x x / x x x / x x x / x x x 008.* 8 125/ VAC x x x 010.* / x x x 232 Series To order 125Vac rated, please add part no. suffix * Interrupting for 8A & 10A is A@250Vac Please refer to for current information. 289 Revised: Jan 12, Series

294 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Medium-Acting Transientology > 232 Series Temperature Rerating Curve Average Time Current Curves 1A 1.25A 1.6A 2A 2.5A 3A 3.15A 4A 5A 6.3A 8A 10A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 232 Series 290 Please refer to for current information.

295 Axial Lead & Cartridge Fuses 5 20 mm > Medium-Acting > 232 Series Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Glass Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A. Test Condition A Reference IEC Second Edition Annex A Cap 1: Brand log, current and voltage ratings, and agency approval Cap 2: Blank Operating Temperature Thermal Shock Vibration Humidity 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65 O C O C) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A high RH (95%) and elevated temperature (40 O C) for 240 hours. Packaging Available in Bulk (M=0 pcs/pkg) or on Tape/Reel (MRET1=0 pcs/reel) Salt Spray MIL-STD-202G, Method 101D, Test Condition B Dimensions P XEP Notes: * s above 6.3A have 0.8 mm dia lead 0.65* MAX All dimensions in mm 5.8 MAX Part Numbering System Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler 0232 xxxx M X 125 P Under Option Code 125 = To order 125Vac rated fuse Blank = 250Vac rated fuse Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 232 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape EIA 296-E 0 MRET1 T1=52mm (2.062 ) 232 Series Please refer to for current information Series

296 Introduction to Circuit Protection Transientology 292

297 Axial Lead & Cartridge Fuses 5 20 mm > Fast-Acting > 235 Series 235 Series, 5 x 20 mm, Fast-Acting Fuse PS E Description 5x20mm fast-acting glass body cartridge fuse designed to UL specification. Features ANCE 248 Standard lead-free and axial lead format Agency Approvals Agency Agency File Number Ampere Range PS E Cartridge Certificates: NBK E10480 G NBK E10480 I Leaded Certificates: NBK E10480 H NBK E10480 J Certificates: SU SU SU Listed File: E10480 Guide No: JDYX File No: Certificate Class No: LR A 5A 6A & 7A 1A 5A 6A & 7A ma 400mA 500mA 3A 4A 6A ma - 7A ma 3A 4A 6A ma 7A Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere Ampere Opening Time % 4 hours, Minimum 135% ma 7A 1 hour, Maximum 200% 5 seconds, Maximum 235 Series Please refer to for current information. 293 Revised: Jan 12, Series

298 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Fast-Acting Transientology > 235 Series Electrical Characteristic Specifications by Item Amp Code Amp (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x x x x x A@250Vac, x x x x A@125Vac x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac, 00A@125Vac x x x x x x x x x x x x x x x x x x x x x x x x x x x x 00@125Vac x x x x x x x x PS E Temperature Rerating Curve Average Time Current Curves 0.A 0.125A 0.200A 0.250A 0.300A 0.400A 0.500A 0.600A 0.700A 0.800A 1A 1.25A 1.6A 2A 2.5A 3A 4A 5A 6A 00 0 TIME IN SECONDS CURRENT IN AMPERES Please contact Littelfuse for details on T-C curve for 7A rating 235 Series 294 Please refer to for current information.

299 Axial Lead & Cartridge Fuses 5 20 mm > Fast-Acting > 235 Series Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Product Characteristics Materials Terminal Strength Solderability Product Marking Packaging Body: Glass Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A. Test Condition A Reference IEC Second Edition Annex A Cap 1: Brand logo, current and voltage rating Cap 2: Series and agency approval markings Available in Bulk (M=0 pcs/pkg) or on Tape/Reel (MRET1=0 pcs/reel) Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65 O C O C) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A high RH (95%) and elevated temperature (40 O C) for 240 hours MIL-STD-202G, Method 101D, Test Condition B 235 Series Please refer to for current information Series

300 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Fast-Acting Transientology > 235 Series Dimensions Part Numbering System P Series 0235 xxxx M X E P Amp Code Refer to Amp Code column of Electrical Characteristics Table XEP to XEP MAX 6.0 MAX Quantity Code M = 0 Packaging Code X = Filler Option Code E = Axial Leaded XEP to XEP MAX 0.65* 5.8 MAX Lead-free All dimensions in mm Notes: * s above 6.3A ø0.8 mm dia lead Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 235 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXB N/A Reel and Tape EIA 296-E 0 MRET1 T1=52mm (2.062 ) 235 Series 296 Please refer to for current information.

301 Axial Lead & Cartridge Fuses 5 20 mm > Medium-Acting > 233 Series 233 Series, 5 x 20 mm, Medium-Acting Fuse PS E Description 5x20mm medium acting glass body fuse designed to UL specification. Features ANCE 248 Standard lead-free and axial lead format Agency Approvals Agency Agency File Number Ampere Range PS E Cartridge Certificates: NBK E10480 C NBK E10480 I Leaded Certificates: NBK E10480 D NBK E10480 J Certificates: SU Listed File: E10480 Guide: JDYX Fle: Acc. Class: LR A 5A 6A 10A 1A 5A 6A 10A 1A 6.5A 1A 10A Electrical Characteristic Specifications by Item Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere % 135% 200% Ampere 1A 3.5A 4A 7A 8A 10A 1A 3.5A 4A 7A 8A 10A 1A 3.5A 4A 7A 8A 10A Opening Time 4 hours, Minimum 1 hour, Minimum 1 hour, Minimum 15 sec., Min; 1500 sec., Max. 15 sec., Min; 1500 sec., Max. 3 sec., Min; 3600 sec., Max..60 sec., Min; 3 sec., Max..60 sec., Min; 3 sec., Max. 0.4 sec., Min; 2.25 sec., Max. 233 Series Amp Code Amp (A) Voltage (V) Please refer to for current information. Interrupting Nominal Cold Resistance (Ohms) 297 Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x VAC x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x Revised: Jan 12, 2009 PS E 233 Series

302 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Medium-Acting Transientology > 233 Series Temperature Rerating Curve Average Time Current Curves Soldering Parameters - Wave Soldering 300 Temperature ( C) - Measured on bottom side of board A 1.25A 1.6A 2A 2.5A 3A 3.15A 3.5A 4A 5A 6A 6.3A 7A 8A 10A TIME IN SECONDS CURRENT IN AMPERES Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 233 Series 298 Please refer to for current information.

303 Axial Lead & Cartridge Fuses 5 20 mm > Medium-Acting > 233 Series Product Characteristics Materials Terminal Strength Solderability Product Marking Packaging Body: Glass Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap 1: Brand logo, current and voltage rating Cap 2: Series and agency approval markings Available in Bulk (M=0 pcs/pkg) or on Tape/Reel (MRET1=0 pcs/reel) Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65ºC to +125ºC) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A. high RH (95%) and elevated temp (40ºC) for 240 hours MIL-STD-202G, Method 101D, Test Condition B Dimensions Part Numbering System P XEP MAX.65* MAX Series 0233 xxxx M X P Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Lead-free Packaging All dimensions in mm Notes: * s above 6.3A have 0.8 mm dia lead Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 233 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape EIA 296-E 0 MRET1 T1=52mm (2.062 ) 233 Series Please refer to for current information Series

304 Introduction to Circuit Protection Transientology 300

305 Axial Lead & Cartridge Fuses 5 20 mm > Medium-Acting > 234 Series 234 Series, 5 x 20 mm, Medium-Acting Fuse PS E Description 5x20mm medium-acting glass/ceramic body cartridge fuse designed to UL specification. Features ANCE 248 Standard and axial lead format Ceramic body for 4-10A lead-free Agency Approvals Applications Agency Agency File Number Ampere Range PS E Cartridge Certificates: NBK E10480 C NBK E10480 E NBK E10480 G Leaded Certificates: NBK E10480 H NBK E10480 F NBK E10480 H Certificates: SU SU SU Listed File: E10480 Guide: JDYX File: Certificate Class: LR A 3.5A 4A & 5A 6A 10A 1A 3.5A 4A & 5A 6A 10A 1A 3.15A 3.5A 4A 10A 1A 10A Electrical Characteristic Specification by Item Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere % 135% 200% Ampere Opening Time hours, Minimum hour, Minimum sec., Min; 1 hr. Max sec., Min; 1 hr. Max ms., Min; 2.25 sec. Max ms., Min; 4 sec. Max 234 Series Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x x x x VAC x x x x x VAC x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x VAC x x x x x VAC x x x x x x x x x x x x x x x PS E Please refer to for current information. 301 Revised: Jan 12, Series

306 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Medium-Acting Transientology > 234 Series Temperature Rerating Curve Average Time Current Curves 1A 1.25A 1.6A 2A 2.5A 3A 3.15A 3.5A 4A 5A 6A 6.3A 8A 10A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 234 Series 302 Please refer to for current information.

307 Axial Lead & Cartridge Fuses 5 20 mm > Medium-Acting > 234 Series Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Glass(1A-3.5A), Ceramic(4A-10A) Cap: Nickel plated brass Leads: Tin plated Copper Filter: Sand (4A 10A) MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap 1: Brand logo, current and voltage rating Cap 2: Series and agency approval markings Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65ºC to +125ºC) MIL-STD-202F Method 201A MIL-STD-202G, Method 103B, Test Condition A. high RH (95%) and elevated temp (40ºC) for 240 hours MIL-STD-202G, Method 101D, Test Condition B Packaging Available in Bulk (V=5, H=, M=0 pcs/pkg) or on Tape/Reel (MRET1=0 pcs/reel) Dimensions P XEP Notes: * s above 6.3A have 0.8 mm dia lead MAX 0.65* All dimensions in mm 5.8 MAX Part Numbering System Series 0234 xxxx MX P Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 234 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A Reel and Tape EIA 296-E 0 MRET1 T1=52mm (2.062 ) 234 Series Please refer to for current information Series

308 Introduction to Circuit Protection Transientology 304

309 Axial Lead & Cartridge Fuses 5 20 mm > Time Lag > 239 Series 239 Series, 5 x 20 mm, Slo-Blo Fuse PS E Description 5x20mm time-lag glass body cartridge fuse designed to UL specification. Features ANCE 248 Standard lead-free and axial lead format Agency Approvals Agency Agency File Number Ampere Range PS E Cartridge Certificates: NBK E10480 G NBK E10480 C NBK E10480 I Leaded Certificates: NBK E10480 H NBK E10480 D NBK E10480 J Certificates: SU A SU A Listed File: E10480 Guide: JDYX File: Certificates Class: LR A 3.5A 4A & 5A 7A 1A 3.15A 4A & 5A 7A 200mA 3.15A 4A 7A 80mA 7A 200mA 3.15A 4A 7A 80mA 7A Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere Ampere s Opening Time % 4 hours, Minimum 135% All s 1 hour, Maximum 200% 5 seconds., Min; 2 min., Max 239 Series Please refer to for current information. 305 Revised: Jan 12, Series

310 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time Lag Transientology > 239 Series Electrical Characteristic Specification by Item Amp Code Amp (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals PS E x x x x 125 VAC x x x x x x x x x x x x x x x x x x x x VAC x x x x VAC x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x VAC x x x x x VAC x x x x x x x x x x x x x x x x x x x x x VAC x x x x x x x x x x 239 Series 306 Please refer to for current information.

311 Axial Lead & Cartridge Fuses 5 20 mm > Time Lag > 239 Series Temperature Rerating Curve Average Time Current Curves 0.200A 0.250A 0.300A 0.400A 0.500A 0.600A 0.700A 0.750A 0.800A 1A 1.25A 1.6A 2A 2.5A 3A 3.15A 4A 5A 7A 00 0 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: 239 Series Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Please refer to for current information Series

312 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time Lag Transientology > 239 Series Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Glass Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap 1: Brand logo, current and voltage rating Cap 2: Series and agency approval markings Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65ºC to +125ºC) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A. high RH (95%) and elevated temp (40ºC) for 240 hours MIL-STD-202G, Method 101D, Test Condition B Dimensions P XEP Notes: * s above 6.3A have 0.8 mm dia lead MAX 0.65* All dimensions in mm 5.8 MAX Part Numbering System Series 0239 xxxx M X P Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width 239 Series Bulk N/A 0 MXE N/A Bulk N/A 0 MXB N/A Reel and Tape EIA 296-E 0 MRET1 T1=52mm (2.062) 239 Series 308 Please refer to for current information.

313 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 477 Series 477 Series, 5 x 20 mm, Time-Lag (Slo-Blo ) Fuse PS E 477 Series Please refer to for current information. 309 Revised: Oct 29, Series

314 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 5 20 mm > Time-Lag Transientology > 477 Series 477 Series 310 Please refer to for current information.

315 Axial Lead & Cartridge Fuses 5 20 mm > Time-Lag > 477 Series 477 Series Please refer to for current information Series

316 Introduction to Circuit Protection Transientology 312

317 Axial Lead & Cartridge Fuses 312/318 Series Lead-Free 3AG, Fast-Acting Fuse PS E Description The 3AG Fast-Acting Fuse solves a broad range of application requirements while offering reliable performance and cost-effective circuit protection. Features Agency Approvals Standard and axial lead format and with various forming dimensions Lead-free (except 10mA and 31mA rated items) Agency Agency File Number Ampere Range PS E E10480 AU1410 LR NBK E10480B/F E10480 SU /5006/6005/ Series: 10mA - 10A/ 318 Series: 31mA - 10A 312 Series: 12A - 30A 312 Series: 10mA - 30A 318 Series: 31mA - 10A 312/318 Series: 1A - 10A 318 Series: 12A - 30A 312/318 Series: 1A/ 1.25A / 1.6A/ 2A - 10A 312 Series: 10mA - 10A 318 Series: 31mA - 10A Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere Ampere Opening Time % 10mA 35A 4 hours, Minimum 135% 10mA 35A 1 hour, Maximum 200% 10mA 10A 12A 30A 35A 5 sec., Maximum 10 sec., Maximum 20 sec., Maximum 312/318 Series Please refer to or /318.html for current information. 313 Revised: Jan 12, /318 Series

318 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Electrical Characteristic Specifications by Item Amp Code Ampere (A) Voltage (V).10 * Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals NA x x x **.031 * x x x x x x x x x x x x x x x x x x A@250Vac 10KA@125Vac x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac 10KA@125Vac x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac x x x x x KA@125Vac x x x x x x x x x x x x x x x 012. * x x ** x 015. * x x ** x 020. * A@32 Vac x x ** x 025. * x x ** x 030. * x x ** x NOTES: * 10mA and 31mA are not RoHS compolaint as the glass bead contains Pb. ** For 318 Series 12A to 30A, the agency approval is only curus. PS E 312/318 Series 314 Please refer to or /318.html for current information.

319 Axial Lead & Cartridge Fuses Temperature Rerating Curve Average Time Current Curves A.062 A.125 A.250 A A.750 A 1 A 1.5 A 2 A 2.5 A A 6 7 A 8 A 10 A TIME IN SECONDS CURRENT IN AMPERES Please contact Littelfuse for more details on those T-C Curves of other ampere ratings which are not published. Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: 312/318 Series Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Please refer to or /318.html for current information /318 Series

320 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Glass Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1: Cap2: Brand logo, current and voltage ratings Series and agency approval marks Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles -65 C to +125 C) MIL-STD-202G, Method 201 A MIL-STD-202G, Method 103B, Test Condition A: High RH (95%), and Elevated temperature (40 C) for 240 hours MIL-STD-202G, Method 101D, Test Condition B Dimensions Measurements displayed in millimeters (inches) (.275") 6.35 (.25") 312 Series (1.25") 318 Series Axial Lead Material: Tin Coated Copper (.032") (1.288") (1.56") TYP. Standard Length (0.50 ) TYP Short Lead Option Part Numbering System Series Quantity Code M = 0 Packaging Code X = Filler Lead-free 0312 xxxx M X P Amp Code Refer to Amp Code column of Electrical Characteristics Table Packaging Packaging Option Quantity Quantity & Packaging Code 312 Series (Cartridge Type) Bulk 5 VX Bulk HX Bulk 0 MX Bulk 0 MXCC Bulk HXCC 318 Series (Axial Leaded) Bulk 5 VX Bulk HX Bulk 0 MX Bulk 0 MXSL Bulk 0 MXB 312/318 Series 316 Please refer to or /318.html for current information.

321 Axial Lead & Cartridge Fuses 313/315 Series Lead-Free 3AG, Slo-Blo Fuse PS E Description The 3AG Slo-Blo fuse solves a broad range of application requirements while offering reliable performance and costeffective circuit protection. The fuse catalog number with the suffix ID instantly identifies itself upon opening by showing a discoloration of its glass body. Guesswork and time consuming circuit testing are eliminated. This unique design offers the same quality performance characteristics as the standard 3AG Slo-Blo Fuse design. Agency Approvals Features Agency Agency File Number Ampere Range Standard Lead-free E10480 LR E mA - 10A** 10mA - 10A**/15A** 10A - 30A and axial lead format and with various forming dimensions PS NBK E E10480B/D/F/G/H SU /5008/5009/6004 1A - 10A**/ 15A** 2.25A - 8A 10mA - 10A**/15A** Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics by Series % of Ampere Ampere Opening Time % 10mA 30A 4 hours, Minimum 135% 10mA 30A 1 hour, Maximum 200% 10mA 15A 20A 30A 5 sec., Min., 30 sec., Max 5 sec., Min., 60 sec Max 313/315 Series Please refer to or /315.html for current information. 317 Revised: Jan 12, /315 Series

322 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Electrical Characteristic Specifications by Item Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac x x x KA@125Vac x x x x x x x x x x x x.500* x x x x x x x x x x x x x x x 001.* x x x x x x x x x x x x 01.5* x x x x x x x x x x x x 002.* A@250Vac 10KA@125Vac x x x x x x x x x x x x x x x x x x x 003.* x x x x x x x x x x 004.* x x x x x 005.* x x x x x 6.25* @250Vac x x x x x KA@125Vac x x x x x 007.* x x x x x 008.* x x x x x 010.* x x x x 010.* x x 015.** x x x x 300A@32Vac x x x x * For 313series, these ratings available with an indicating option. Add the ID designation to the series number. i.e ID. ** These 2 ratings are designed for special voltage requirement. For 10A, it is available as 250Vac rated and the part number is MX250P; for 15A, it is available as 125Vac rated and the part number is MX125P. PS E 313/315 Series 318 Please refer to or /315.html for current information.

323 Axial Lead & Cartridge Fuses Temperature Rerating Curve Average Time Current Curves 0 1/16A 1/10A 15/.175A 1/4A 3/8A 1/2A 3/4A 1A 1 1/2A 2A 3A 4A 5A 7A 8A 10A 12A 15A 20A 25A 30A A B B A TIME IN SECONDS 10 1 A - For 313/315 Series, from 10mA to 150mA B - For all other ampere ratings of 313/315 series CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: 313/315 Series Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Please refer to or /315.html for current information /315 Series

324 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Glass Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1: Brand logo, current and voltage ratings Cap2: Series and agency approval marks Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles -65 C to +125 C) MIL-STD-202G, Method 201 A MIL-STD-202G, Method 103B, Test Condition A: High RH (95%) and Elevated temperature (40 C) for 240 hours MIL- STD-202G, Method 101D, Test Condition B Dimensions 6.35 (.25") P Series P Series (1.25") (.275") (1.275") Axial Lead Material: Tin coated copper (.032") ( 1/ - 15A) (.040") (20-30A) 38.1 (1.50") TYP. Part Numbering System Series 0313 xxxx M X P Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Reel Size 313 Series Bulk N/A 5 VX N/A Bulk N/A HX N/A Bulk N/A HXID N/A Bulk N/A 0 MX N/A Bulk N/A 0 MX250 N/A Bulk N/A HXCCD N/A Bulk N/A VXID N/A 315 Series Bulk N/A 5 VX N/A Bulk N/A HX N/A Bulk N/A 0 MX N/A Bulk N/A 0 MX125 N/A Bulk N/A 0 MXB N/A Bulk N/A HXB N/A Bulk N/A 0 MXBB N/A Bulk N/A 0 MXSL N/A Bulk N/A 0 MXB N/A Bulk N/A 0 MXSL N/A 313/315 Series 320 Please refer to or /315.html for current information.

325 Axial Lead & Cartridge Fuses 3AB > Fast-Acting > 314/324 Series 314/324 Series Lead-free 3AB, Fast-Acting Fuse PS E Description The 3AB Fast-Acting Fuse with ceramic body construction permits higher interrupting ratings and voltage ratings. Ideal for applications where high current loads are expected. Features Agency Approvals Agency Agency File Number Ampere Range E mA - 15A Standard and axial lead format and with various forming dimensions Applications Lead-free Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. LR mA - 20A Electrical Characteristics for Series PS E E10480 NBK E10480A-F NBK JP1021A/B SU /6002/6003/ A* - 40A 125mA - 30A 125mA - 30A 125mA - 30A % of Ampere Ampere Opening Time % 1/ hours, Minimum 135% 1/ hour, Maximum 200% 1/ secs., Maximum secs., Maximum 250% secs., Maximum Electrical Specification by Item Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals x x x VAC x x x VAC x x x VDC x x x x x x VAC x x x x VAC x x x x VDC x x x x x x x x x x x x x x x x x x x x VAC x x x x x VAC x x x x x VDC x x x x x x x x x x x x x x x 015.* x x VAC VAC x x x x x 020.* VAC VDC x x VAC x x x x 025.** VDC 125 VAC x x VDC x x x x VAC VDC x x * 350A@280VAC interrupting rating available for 15A and 20A. ** 50A@280VAC for 25A. Add suffix 280. Example: MX280P. PS E 314/324 Series Please refer to or /324.html for current information. 321 Revised: September 3, /324 Series

326 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 3AB > Fast-Acting > Transientology 314/324 Series Temperature Rerating Curve Average Time Current Curves 0.125A.250A.375A.500A.750A 1A 2A 3A 4A 5A 6A 7A 8A 10A 12A 15A 20A 25A 30A 40A TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 314/324 Series 322 Please refer to or /324.html for current information.

327 Axial Lead & Cartridge Fuses 3AB > Fast-Acting > 314/324 Series Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Ceramic Cap: Nickel plated Brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1: Brand logo, current and voltage ratings Cap2: Series and agency approval marks Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B (5 cycles, -65 C to +125 C) MIL-STD-202G, Method 201 A MIL-STD-202G, Method 103B, Test Condition A (High RH (95%) and Elevated temperature (40 C) for 240 hours) MIL- STD-202G, Method 101D, Test Condition B Dimensions 6.35 (.25") P Series P Series (1.25") (.275") (1.288") Axial Lead Material: Tin-coated copper (.032") ( A) (.040") (20-30A) 38.1 (1.50") TYP Part Numbering System Series 0314 xxxx M X P Amp Code Refer to Amp Code column of Electrical Specification Table Quantity Code M = 0 Packaging Code X = Filler Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Reel Size 314 Series Bulk N/A 5 VX N/A Bulk N/A HX N/A Bulk N/A 0 MX N/A Bulk N/A 0 MX52L N/A Bulk N/A 0 MXCC N/A Bulk N/A 0 MX52LE N/A 324 Series Bulk N/A 5 VX N/A Bulk N/A HX N/A Bulk N/A 0 MX N/A Bulk N/A 0 MX280 N/A Bulk N/A 0 MX52 N/A Bulk N/A 0 MXF24 N/A 314/324 Series Please refer to or /324.html for current information /324 Series

328 Introduction to Circuit Protection Transientology 324

329 Axial Lead & Cartridge Fuses 3AB > Very Fast-Acting > 322 Series 322/332 Series Lead-free 3AB, Very Fast-acting Fuse PS E Description The 3AB Very Fast-Acting Fuse for protection of Silicon Controlled Rectifiers and similar solid-state devices. Features Standard Lead-free format only Agency Approvals Agency Agency File Number Ampere Range E A - 30A Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. PS E E10480 NBK JP1021A/B 1A - 10A 1A - 10A 1A - 30A Electrical Characteristics for Series % of Ampere Ampere Opening Time % hours, Minimum 250% second, Maximum sec.ond, Maximum. Electrical Characteristic Specifications by Item Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) PS E Agency Approvals x x x x x x x x x x x x A@250Vac x x x A@125Vdc x x x A@72Vdc x x x x x x x x x x x x x x x x x x x A@65Vac 0A@65Vdc x x 025.* x x 030.* x x 322 Series * s from 1A to 10A are available for 332 series * s from 12A to 30A are available for 322 series, these ratings are RoHS compliant version. Please refer to for current information. 325 Revised: Jan 12, Series

330 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 3AB > Very Fast-Acting Transientology > 322 Series Temperature Rerating Curve Average Time Current Curves 0 1/8A 1/4A 3/8A 1/2A 3/4A 1A 2A 3A 4A 5A 6A 7A 8A 10A 12A 15A 20A 25A 30A TIME IN SECONDS CURRENT IN AMPERES Product Characteristics Materials Body: Ceramic Cap: Nickel plated brass Operating Temperature 55ºC to +125ºC Terminal Strength MIL-STD-202G, Method 211A, Test Condition A Thermal Shock MIL-STD-202G, Method 107G, Test Condition B: (5 cycles -65 C to +125 C) Solderability Product Marking Reference IEC Second Edition Annex A Cap1: Cap2: Brand logo, current and voltage ratings Series and agency approval marks Vibration Humidity MIL-STD-202G, Method 201 A MIL-STD-202G, Method 103B, Test Condition A: High RH (95%) and Elevated temperature (40 C) for 240 hours Salt Spray MIL- STD-202G, Method 101D, Test Condition B 322 Series 326 Please refer to for current information.

331 Axial Lead & Cartridge Fuses 3AB > Very Fast-Acting > 322 Series Dimensions P / P Series Part Numbering System 0322 xxxx M X P 6.35 (.25") (1.25") Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Reel Size 322Series Bulk N/A 5 VX N/A Bulk N/A HX N/A Bulk N/A 0 MX N/A 332 Series Bulk N/A HX N/A Bulk N/A 0 MX N/A 322 Series Please refer to for current information Series

332 Introduction to Circuit Protection Transientology 328

333 Axial Lead & Cartridge Fuses 3AB > Time Lag > 325/326 Series 325/326 Series Lead-Free 3AB, Slo-Blo Fuse PS E Description The 3AB Slo-Blo Fuse with ceramic body construction permits higher interrupting ratings and voltage ratings. Ideal for applications where high current loads are expected. Features Standard Lead-free Agency Approvals Agency Agency File Number Ampere Range and axial lead format and with various forming dimensions E mA - 10A Applications E10480 LR A - 30A 250mA - 30A Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. NBK PS E10480A-F/ E NBK JP1021A/B SU /6006/6007/7005 1A - 30A 2.5A - 3.2A/ 7A - 30A 10mA - 30A Electrical Characteristics for Series % of Ampere Ampere Opening Time % ma 30A 4 hours, Minimum 135% ma 30A 1 hour, Maximum 200% ma 3.2A 4A 30A 5 sec., Min., 30 sec., Max. 5 sec., Min., 60 sec., Max. 325/326 Series Please refer to or /326.html for current information. 329 Revised: Jan 12, /326 Series

334 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 3AB > Time Lag > Transientology 325/326 Series Electrical Characteristic Specifications by Item Amp Code Ampere (A) Voltage (V) Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) PS E Agency Approvals x x x x A@250Vac x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac x x x 10KA@125Vac KA@125Vdc x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x A@250Vac KA@125Vac x x x x x x x x x x x x x A@250Vac x x x x KA@125Vac x x x x x x x x x x x x x x x x x x x x 012.* x x x A@250Vac x x x x x 10KA@125Vac 015.* A@60Vdc x x x x x x x x 020.* x x x A@125Vac x x x x x KA@60Vdc 600A@125Vdc x x x x x *Higher I 2 t version available MXDP nominal I 2 t is 2507 A 2 Sec 325/326 Series 330 Please refer to or /326.html for current information.

335 Axial Lead & Cartridge Fuses 3AB > Time Lag > 325/326 Series Temperature Rerating Curve Average Time Current Curves 0.375A.500A.750A 1.0A 1.5A 2.0A 2.5A 3.0A 3.5A 4.0A 5.0A 6.25A 7.0A 8.0A 10.0A 12.0A 15.0A 20.0A 25.0A 30.0A 10 TIME IN SECONDS CURRENT IN AMPERES 0 Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: 325/326 Series Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Please refer to or /326.html for current information /326 Series

336 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 3AB > Time Lag > Transientology 325/326 Series Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Ceramic Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1: Cap2: Brand logo, current and voltage ratings Series and agency approval marks Operating Temperature Thermal Shock Vibration: Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B:(5 cycles - 65ºC to 125ºC) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A: High RH (95%) and Elevated temperature(40ºc) for 240 hours MIL-STD-202G, Method 101D, Test Condition B Dimensions P Series P Series Part Numbering System 0325 xxxx M X P 6.35 (.25") (1.25") (.275") (1.288") Axial Lead Material: Tin coated copper (.032") ( 1/ -15A) (.040") (20-30A) 38.1 (1.50") TYP. Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Reel Size 325 Series Bulk N/A 5 VX N/A Bulk N/A HX N/A Bulk N/A 0 MX N/A Bulk N/A 0 MX52 N/A Bulk N/A 0 MX52L N/A Bulk N/A 0 MXD N/A Bulk N/A 0 MXF31 N/A 326 Series Bulk N/A 5 VX N/A Bulk N/A HX N/A Bulk N/A 0 MX N/A Bulk N/A 0 MXCC N/A Bulk N/A 0 MXD N/A 325/326 Series 332 Please refer to or /326.html for current information.

337 Axial Lead & Cartridge Fuses 388 Series Lead-Free 3AG, METI B Fuse PS E Description The Littelfuse 388 Series is a 3AG size fuse that solves a broad range of application requirements while offering reliable performance and cost-effective circuit protection. Features Standard JIS C6575 Lead-free and axial lead form and various forming demensions Agency Approvals Agency Agency File Number Ampere Range PS E NBK JP1021A NBK JP1021A/B/C/D SU SU /2/3/4 1A - 30A 3A - 6A 7A/10A - 30A 1A - 30A Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere Opening Time Hour, Minimum hour, Maximum seonds, Maximum Electrical Characteristic Specifications by Item Amp Code Amp Voltage Breaking Capacity Nominal Resistance Cold Ohms (ohms) Nominal Melting 2T (A2Sec.) PS E Agency Approvals x x x x x x x x x x x x x x x x x x x x Vac x x x x x x x x x x x x x x x x x x x x x x x x x 388 Series 1 Depending on the application and mounting, the fuse heating at max. ambient temperature in a closed fuseholder should be considered. p = pending Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand. Please refer to for current information. 333 Revised: Jan 12, Series

338 Introduction Axial Lead to & Circuit Cartridge Protection Fuses Transientology Temperature Rerating Curve Average Time Current Curves 0 1A 1.5A 2A 2.5A 3A 4A 5A 6A 7A 8A 10A 12A 15A 20A 25A 30A 10 TIME IN SECONDS CURRENT IN AMPERES Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Preheat Time Dwell Time Cooling Time Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 388 Series 334 Please refer to for current information.

339 Axial Lead & Cartridge Fuses Product Characteristics Materials Terminal Strength Solderability Product Marking Body: Glass End Caps: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap1: Cap2: Brand logo, current and voltage ratings Series and agency approval marks Operating Temperature Thermal Shock Vibration Humidity Salt Spray -55ºC to +125ºC (consider de-rating) MIL-STD-202G Method 107 G, Test conditon B:(5 cycles - 65ºC to 125ºC) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A: High RH (95%) and Elevated temperature (40 C) for 240 hours MIL-STD-202G, Method 101D, Test Condition B Dimensions (mm) P Series EP Series Part Numbering System 0388 xxxx M X E P 6.35 (.25") (1.25") (.275") (1.288") Axial Lead Material: Tin coated copper (.032") 38.1 (1.50") TYP. Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Option Code E = Axial leaded fuses Blank = Cartridge fuses Lead-free Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Reel Size 388 Series Bulk N/A 0 MX N/A Bulk N/A 0 MXE N/A 388 Series Please refer to for current information Series

340 Introduction to Circuit Protection Transientology 336

341 Axial Lead & Cartridge Fuses 3AB > Fast-Acting > 505 Series 505 Series, Lead-free 3AB, Fast-Acting Fuse Description Features Agency Approvals Agency Agency File Number Ampere Range Applications Electrical Characteristics for Series % of Ampere % % % Ampere Opening Time Electrical Characteristics Specifications by Item Amp Code Amp (A) Max Voltage (V) Interrupting 20kA@450VAC 0A@250VDC 50kA@500VAC 20kA@500VDC 30kA@500VAC 20kA@500VDC Nominal Cold Resistance (Ohms) Nominal Melting I 2 T (A 2 Sec.) Agency Approvals X X X X X X X X X X X X X X 505 Series Please refer to for current information. 337 Revised: Jan 20, Series

342 Introduction Axial Lead to & Circuit Cartridge Protection Fuses 3AB > Fast-Acting Transientology > 505 Series Temperature Rerating Curve Average Time Current Curves 00 10A 12A 16A 20A 25A 30A 0 TIME IN SECONDS CURRENT IN AMPERES 0 Soldering Parameters - Wave Soldering Temperature ( C) - Measured on bottom side of board Time (Seconds) Preheat Time Dwell Time Cooling Time Recommended Process Parameters: Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature Minimum: Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) C 150 C seconds 260 C Maximum 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. 505 Series 338 Please refer to for current information.

343 Axial Lead & Cartridge Fuses 3AB > Fast-Acting > 505 Series Product Characteristics Material Terminal Strength Solderability Product Marking Packaging Body: Ceramic Cap: Nickel plated brass Leads: Tin plated Copper MIL-STD-202G, Method 211A, Test Condition A Reference IEC Second Edition Annex A Cap 1: Brand logo, current and voltage rating Cap 2: Series and agency approval markings Available in Bulk (M=0 pcs/pkg) Operating Temperature Thermal Shock Vibration Humidity Salt Spray 55ºC to +125ºC MIL-STD-202G, Method 107G, Test Condition B: (5 cycles 65 C to +125 C) MIL-STD-202G, Method 201A MIL-STD-202G, Method 103B, Test Condition A. high RH (95%) and elevated temperature (40 C) for 240 hours MIL-STD-202G, Method 101D, Test Condition B Dimensions 6.35 (.25 ) P Series EP Series (1.25 ) (.275 ) Max (.032 ) (10-16A) (.040 ) (20-30A) (1.288 ) 38.1 (1.50 ) TYP. All Dimensions in mm Part Numbering System 0505 xxxx MX E Series Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 0 Packaging Code X = Filler Option Codes E : Axial Leaded Others : special options. Please call Littelfuse for detail. Lead-Free P Packaging 505 Series Bulk Bulk N/A N/A 0 0 MX MXE N/A N/A 505 Series Please refer to for current information Series

344 Introduction to Circuit Protection Transientology 340

345 Special Application Fuses 242 Series Barrier Network Fuse Barrier Network Fuse 242 Series Description The 242 Series hazardous area barrier network fuse offers a range of fuses designed to enable greater safety operating electronic equipment within potentially explosive environments. Features Agency Approvals Standards (EN50020) for hazardous applications. rating. Meets the 1500A minimum. lead and surface mount. Agency Agency File Number Ampere Range Recognized under the components program of Underwriters Laboratories (JDYX ) Electrical Characteristics A Applications electrical equipment; Electrical connections and components, Test equipment % of Ampere Opening Time 110% 4 hours, Minimum 300% 10 seconds, Maximum 0% seconds, Maximum Electrical Characteristics Ampere (A) Amp Code Body Color Coding Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 Sec.) Agency Approvals Red x Green x 0.. Blue x Violet 250VAC/VDC x Brown x Black x 242 Series Please refer to for current information. 341 Revised: Jan 12, 2009 Barrier Network Fuse 242 Series

346 Temperature Introduction Special to Application Circuit Protection Fuses 242 Series Barrier Transientology Network Fuse Average Time Current Curves Dimensions.050 A.080 A. A.125 A.160 A.200 A.250 A 4.60mm (.181") 1.90mm (.075") mm (.119") 8.40mm (.331").635mm (.025") TIME IN SECONDS mm (.119") 4.60mm (.181") 8.40mm (.331") 1.90mm (.075") 9.80mm mm 3.20mm CURRENT IN AMPERES Soldering Parameters Reflow Condition Pb Free assembly - Temperature Min (T s(min) ) 150 C Pre Heat - Temperature Max (T s(max) ) 200 C - Time (min to max) (t s ) secs Average ramp up rate (Liquidus Temp (T L ) to peak 5 C/second max T S(max) to T L - Ramp-up Rate 5 C/second max - Temperature (T L ) (Liquidus) 217 C Reflow - Temperature (t L ) seconds Peak Temperature (T P ) /-5 C Time within 5 C of actual peak Temp. (t p ) seconds Ramp-down Rate 5 C/second max Time 25 C to peak Temperature (T P ) 8 minutes Max. Do not exceed 260 C T P T L T S(max) T S(min) 25 Wave Soldering Preheat t S time to peak temperature (t 25ºC to peak) Ramp-up t P t L 260 C, 10 seconds max. Critical Zone TL to TP Time Ramp-down Product Characteristics Operating Temperature 40 O C to 125 O C. Thermal Shock Vibration Insulation Resistance (After Opening) Withstands 5 cycles of 55 O C to 125 O C Per MIL-STD-202F Greater than 10,000 ohms. Part Numbering System SERIES AMP CODE Refer to Amp Code column in the Electrical Specifications table UAT1 QUANTITY & PACKAGING CODE HAT1 = pcs, Axial Leaded, Ammo Pack T1 Tape UAT1 = 500 pcs, Axial Leaded, Ammo Pack T1 Tape UR = 500 pcs, Surface Mount, Tape & Reel Barrier Network Fuse 242 Series 342 Please refer to for current information.

347 Special Application Fuses 259 Series Safe-T-Plus Fuse Safe-T-Plus Fuse 259 Series Baseefa Description Agency Approvals Agency Agency File Number Ampere Range Baseefa Baseef02ATEX0071U 62mA - 1A E10480 Electrical Characteristics for Series % of Ampere Opening Time 500mA, 750mA % 4 Hours, Minimum 200% 5 Seconds, Maximum The Safe-T-Plus 259 Series offers a range of encapsulated fuses designed to enable greater safety for operating electronic equipment within potentially explosive environments. Originally designed to serve the needs of gas plants, petrochemical and processing industries, these fuses are certitifed for use within intrinsically safe apparatus (CENELEC EN50014 to 039 and IEC ). The encapsulation material is Polyamide 6 at a minimum depth of 1mm (3mm typically) and has a CTI (Comparative Tracking Index) of greater than 175. The leads are separated by a minimum clearance and creepage distance of 9 mm and hence are suitable for use in intrinsically safe appartatus for voltage not exceeding 125V rms (190V peak). Features 62mA - 5A range options within environments where there is danger of gas explosion from faulty circuits Applications processing electronic and electrical equipment use within intrinsically safe apparatus for applications such as gas plants, petrochemical and processing industries Electrical Specifications by Items Ampere (A) Amp Code Interrupting Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 Sec.) Nom Voltage Drop (mv) Schedule of limitations: 1) The fuse must be so mounted that creepage and clearance distances aren t impaired in any way. 2) When used in intrinsically safe apparatus, it will be necessary to determine a surface temperature classification for the fuse. 3) Maximum surface temperature rise at 170% rated current 750mA=40ºC, 1A=45ºC, 3A=63ºC and 5A=114ºC. Agency Approvals Baseefa x x x VAC x x x VDC x x x Series Please refer to for current information. 343 Revised: August 17, 2009 Safe-T-Plus Fuse 259 Series

348 Introduction Special to Application Circuit Protection Fuses 259 Series Safe-T-Plus Transientology Fuse Product Characteristics Average Time Current Curves Operating Temperature 55 C to 90 C Thermal Shock Withstands 5 cycles of 55 C to 125 C.062 A.125 A.250 A.375 A.500 A.750 A 1 A 3.15 A 5 A Vibration Per MIL-STD-202F Insulation Resistance (After Opening) Greater than 10,000 ohms 10 Soldering Parameters Wave Soldering 260 C, 10 seconds max. TIME IN SECONDS Dimensions (.512") 13mm 0.01 (.025").635mm (.394") 10mm (.315") 8mm (.197") 5mm CURRENT IN AMPERES Part Numbering System M SERIES AMP Code The dot is poisitioned before the Packaging Suffix with whole ratings and within the numbering sequence for fractional ratings. Refer to Amp Code column in the Electrical Specifications table. PACKAGING Code M = Bulk pack, 0 pcs T = Bulk pack, 10 pcs Example: 1 amp product is M (.062 amp product shown). Safe-T-Plus Fuse 259 Series 344 Please refer to for current information.

349 Special Application Fuses 481 Series Alarm Indicating Fuse 481 Series Alarm Indicating Fuse Description 481 Series alarm indicating fuses are designed to reduce down time by immediately pinpointing the blown (open) circuit while triggering an LED or audio alarm. This item requires 482 Series mating fuse holder. All ranges of 481 Series fuses are available as our original design, and the 2-20 amp range is now available as a RoHS compliant option (use the P designator when ordering). See the part numbering section of this data sheet for related ordering instructions. Agency Approvals Features Agency Agency File Number E71611 LR Electrical Characteristics flags indicate ampere rating. option available for additional safety. black plolyphenylene sulfide with UL-94V0 flammability rating. bright alloy-plated beryillioum copper. % of Ampere Opening Time % 10 Minutes, Minimum 150% 5 Minutes, Maximum Applications Ideal for telecommunications and control panel circuits Electrical Characteristics Ampere (A) Amp Code Max Voltage (V) Interrupting Body Color Code Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 Sec.) Agency Approvals 0.180*.180 Yellow x x 0.200*.200 Red/Black x x 0.250*.250 Violet x x 0.375*.375 Gray/White x x 0.500*.500 Red x x 0.650*.650 Black x x 0.750* VDC Brown x x 1.00* 001. Gray x x 125 VAC 1.33* 1.33 White x x (up to 20A) 1.50* VAC Yellow/White x x & Orange x x 125 VDC VDC Orange/White x x (up to 15A) Blue x x VDC Blue/White x x (up to 20A) Brown/White x x Green x x Black/White x x Red/White x x Green/Yellow x x Red/Blue x x 20.0** 020. Green/White x x 481 Series * 0.180A thru 1.5A items are not available for sale as a RoHS compliant P option **20A Fuseholder must be used. Fuse is keyed to prevent insertion in lower rated holders. 20A Fuseholder is designed to accept all ratings up to 20 amperes. Please refer to for current information. 345 Revised: Jan 12, 2009 Alarm Indicating Fuse 481 Series

350 Introduction Special to Application Circuit Protection Fuses 481 Series Alarm Indicating Transientology Fuse Product Characteristics Material Vibration Body: Polyphenylene Sulfide (UL 94VO) Terminations: Beryllium Copper/Tin Plated Optional Lens: Nylon Per MIL-STD-202F Operating Temperature 55 O C to 90 O C. Thermal Shock Insulation Resistance (After Opening) Withstands 5 cycles of 55 O C to 125 O C Greater than 10,000 ohms. Dimensions Average Time Current Curves 22.9mm (.90") MIN. 17.8mm (.70") LENS 21.3mm (0.84") REF. 0 18/ A 1/4 A 1/2 A 65/ A 3/4 A 1 A 1 1/3 A 2 A 3 A 4 A 5 A 7 1/2 A 10 A 12 A 15 A 20 A 19.6mm (.77") 11.7mm (.46") 8mm.23") 16.9mm (.665") MAX. 5.3mm (.21") 2.77 (.109") 4.45 (.175") 2.79 (.110") TIME IN SECONDS A 20A* 1 *20A Fuseholder must be used. Fuse is keyed to prevent insertion in lower rated holders. 20A Fuseholder is designed to accept all ratings up to 20 amperes. 0.1 Part Numbering System H XL P RoHS ITEM OPTION CODE: Blank = Standard design item P = RoHS compliant version item (available in 2-20 amp range only) CURRENT IN AMPERES 0 OPTION CODE: Blank = Standard XL = Protective Lens QUANTITY CODE: V = 5 pack H = pack SERIES AMP CODE (See Electrical Characteristics Table) Alarm Indicating Fuse 481 Series 346 Please refer to for current information.

351 Special Application Fuses 482 Series Alarm Indicating Fuse Holder 482 Series Fuseholders Description Ideal for telecommunications and control panel circuits, the 482 Series fuseholder series is designed for use with Littelfuse 481 Alarm Indicating Fuses. Each holder is designed to accept other manufacturer s replacement fuses as well. The fuseholder is available in three versions: Agency Approvals Agency Agency File Number E71611 (20A Panel Mount Only) PCB Mount - 15A: Can be soldered directly to a printed circuit board. Rated up to 15 amperes. Available in single pole or gangable up to 20 poles. Fuseholder is keyed to prevent insertion of 20 ampere fuse. Panel Mount - 20A: Available in a single pole version rated up to 20 amperes. Large leads for wire attachment. Panel Mount - 15A: 15 ampere gangable version of fuseholder is keyed to prevent insertion of 20 ampere fuse. LR Product Characteristics 482 Fuseholder Series 15A PCB Mount and Panel Mount 20A Panel Mount Electrical Rated at 15 amperes up to 125 VAC/ VDC Rated at 20 amperes up to 125 VAC/ VDC Body Material Thermoplastic (UL 94V-0) Black Phenolic (UL 94V-0) Fuse Terminal Material Tin-plated Beryllium Copper Tin-plated Copper Alloy Alarm Terminal Material Tin-plated Brass Tin-plated Copper Alloy Operating Temperature 55 O C to +125 O C. 40 O C to +85 O C. Thermal Shock Withstands 5 cycles of 55 O C to 125 O C Withstands 5 cycles of 55 O C to 125 O C Vibration Per MIL-STD-202F Per MIL-STD-202F Insulation Resistance (After Opening) Greater than 10,000 ohms. Greater than 10,000 ohms. 482 Series Please refer to for current information. 347 Revised: Jan 12, 2009 Alarm Indicating Fuseholder 482 Series

352 Introduction Special to Application Circuit Protection Fuses 482 Series Alarm Indicating Transientology Fuse Holder Ordering Information 20A Panel Mount Fuseholder Type Holder Length * 20A Panel Mount 1 Pole 6.40mm (25 ) ZXPF * NOTE: 20 ampere version of 482 Series Panel Mount fuseholders come standard as a single pole unit with flush edges on both sides (no keys typical with 15A units). Please refer to the diagrams on the following page for additional information. 15A PCB Mount and Panel Mount Fuseholders Type Holder Assembly Length* 15A PCB Mount 15A PCB Mount - Flush 15A Panel Mount 15A Panel Mount - Flush 1 Pole 6.40mm (25 ) ZXB ZXBF ZXP ZXPF 2 Pole 12.80mm (.50 ) ZXB ZXBF ZXP ZXPF 3 Pole 19.05mm (.75 ) ZXB ZXBF ZXP ZXPF 4 Pole 25.04mm (1.0 ) ZXB ZXBF ZXP ZXPF 5 Pole 31.75mm (1.25 ) ZXB ZXBF ZXP ZXPF 6 Pole 38.10mm (1.50 ) ZXB ZXBF ZXP ZXPF 7 Pole 44.45mm (1.75 ) ZXB ZXBF ZXP ZXPF 8 Pole 5.80mm (2.00 ) ZXB ZXBF ZXP ZXPF 9 Pole (2.25 ) ZXB ZXBF ZXP ZXPF 10 Pole 63.50mm (2.75 ) ZXB ZXBF ZXP ZXPF 11 Pole 69.85mm (2.75 ) ZXB ZXBF ZXP ZXPF 12 Pole 76.20mm (3.00 ) ZXB ZXBF ZXP ZXPF 13 Pole 82.55mm (3.25 ) ZXB ZXBF ZXP ZXPF 14 Pole 88.90mm (3.50 ) ZXB ZXBF ZXP ZXPF 15 Pole 95.25mm (3.75 ) ZXB ZXBF ZXP ZXPF 16 Pole mm (4.00 ) ZXB ZXBF ZXP ZXPF 17 Pole mm (4.25 ) ZXB ZXBF ZXP ZXPF 18 Pole mm (4.50 ) ZXB ZXBF ZXP ZXPF 19 Pole mm (4.75 ) ZXB ZXBF ZXP ZXPF 20 Pole mm (5.00 ) ZXB ZXBF ZXP ZXPF * NOTE: 15 ampere gangable version of PCB Mount and Panel Mount fuseholders are keyed to prevent insertion of 20 ampere fuse. Please refer to A dimension of diagrams on following page. For additional terminal lengths, please contact Littelfuse. Flush Side Options Available for PCB and Panel Mount Version 5 POLE HOLDER ASSEMBLY WITH FLUSH OPTION Alarm Indicating Fuseholder 482 Series 348 Please refer to for current information.

353 Special Application Fuses 482 Series Alarm Indicating Fuse Holder Dimensions 15A PCB Mount Series: 15A Panel Mount Series: 21.3mm (.84") TYP 6.4mm (.25") TYP FEMALE LATCHING & FLUSH SIDE WITHOUT TABS A FEMALE & MALE LATCHING WITH TABS A 19.8mm (.78".03 ) TYP Alarm Terminal 1.6mm (.062") TYP 12.4mm (.49") 18.5mm (.73") 4.1mm (.16") TYP 6.4mm 10.7mm Ø 2.3mm HOLES (.250").005 (.420").005 (.090") (3 HOLES) TYPICAL HOLDER ASSEMBLY FEMALE & MALE LATCHING WITH TABS AND NO MOUNTING HOLES 37.1mm (1.46") 30.9mm (1.215") 30.7mm (1.210") FEMALE LATCHING & FLUSH SIDE WITH TABS 6.4mm (.25") TYPICAL HOLDER ASSEMBLY Ø 4.1mm (.160") MOUNTING HOLE (2 HOLES) 30.9mm (1.215") 30.7mm (1.210") 21.8mm (.86".005 ) 6.9mm (.27".005 ) TYPICAL CUT-OUT IN PANEL OR CHASSIS 6.4mm (.250").005 RECOMMENDED P. C. BOARD MOUNTING HOLES 20A Panel Mount Series: 24.9mm (.98".03 ) 0.6mm (.025") TYP 21.3mm (.84") 1.6mm (.062") TYP 18.5mm (.73".010 ) 6.4mm (.25") 9.0mm (.355") 12.4mm (.49".010 ) 15.7mm (.62").150'' DIA, (2 Holes) 21.34mm (.84") 30.9mm (1.212") (1.47") 37.34mm 30.9mm (1.215") 30.7mm (1.210") 6.4mm (.25") 24.9mm (.98".03 ) 0.6mm (.025") TYP 21.3mm (.84") 1.6mm (.062") TYP 18.5mm (.73".010 ) 6.4mm (.25") 9.0mm (.355") 12.4mm (.49".010 ) 15.7mm (.62") Ø 4.1mm (.160") MOUNTING HOLE (2 HOLES) 21.8mm (.86".005 ) RECOMMENDED PANEL MOUNTING HOLES 6.9mm (.27".005 ) TYPICAL CUT-OUT IN PANEL OR CHASSIS NOTE: The 20 ampere single pole holder is designed to accept all fuse ratings up to 20 amperes. 20 ampere fuseholders should be spaced 12.7mm (0.50) apart when loaded to maximum capacity, center to center to insure proper heat dissipation under normal operation. Heatsinking may be required for operation in higher ambient temperatures or alternate configurations. 482 Series Please refer to for current information. 349 Alarm Indicating Fuseholder 482 Series

354 To assist you with your electronics design and selection processes, Littelfuse also offers: Comprehensive Online Product Specs on Littelfuse.com Featuring easy-to-use navigation, search and selection tools, as well as additional product details. You can rely on Littelfuse.com for instant answers and continuously up-to-date information. Printed Product Catalogs For offline and off-the-shelf convenience, our printed product catalogs include data sheets, selection tables and tutorials covering all of our core technologies. Contact your Littelfuse product representative or visit to check availability. Circuit Protection Design Guides Our application design center website, offers a wealth of circuit protection guidance to help you select and apply the best circuit protection solution for your application.

355 As the world's #1 brand in circuit protection Littelfuse offers the broadest and deepest portfolio of circuit protection products and a global network of technical support, backed by more than 80 years of application design expertise. Visit our design support center to access: > Reference Designs > Application Notes > Application Testing > SPICE Models > Local Technical Support > Product Samples > Technical Articles > Certification Documents > Data Sheets Littelfuse offers technologies that protect sensitive electronics and their users against electrostatic discharge (ESD), load switching, lightning strikes, overloads, short circuits, power cross, ground faults and other threats. Overcurrent protection products: Fuses Littelfuse offers the world s broadest range of fuse types and ratings, including cartridge, leaded, surface mount and thin film designs PTCs Positive Temperature Coefficient thermistor technology provides resettable current-limiting protection PRODUCT CATALOG & DESIGN PRODUCT CATALOG & DESIGN GUIDE Overvoltage protection products: T UC UCT DU DUC ROD PR PRO ALOG CAT CATALO & DESIGN GUIDE Varistors Littelfuse offers surface mount Multi-layer Varistors (MLVs) and industrial Metal Oxide Varistors (MOVs) to protect against transients GDTs Gas Discharge Tubes (GDTs) to dissipate voltage through a contained plasma gas Thyristors Littelfuse's solid state switches control the flow of current in a wide range of appliances, tools and equipment SIDACtor Devices Overvoltage protection specifically designed for telecom GUIDE PRODUCT CATALOG & DESIGN PRODUCT CATA GUID E LOG & DESIGN ODUC GUIDPR E T CATA PR LOG OD UCT & DESIGCA N TALO G GUIDE & DE SIGN GUID E DUCT PRO LOG CATA SIGN & DE IDE GU Silicon PulseGuard ESD Suppressors Produc Protection Array ts (SPA) e T be Tu rge Tub Gas Discha ts duc (GDT) Pro fici Coef ture ucts pera Tem tor Prod tive is Posi Therm ) TC (P ent and datacom requirements TVS Diodes Silicon transient voltage suppression (TVS) devices SPA Silicon Protection Arrays designed for analog and digital signal line protection PulseGuard ESD Suppressors Small, fast-acting Electrostatic Discharge (ESD) suppressors To request catalogs for the Littelfuse portfolio of circuit protection technologies, please contact your authorized Littelfuse product representative or visit our website at Littelfuse, Inc. Specifications descriptions and illustrative material in this literature are as accurate as known at the time of publication, but are subject to changes without notice. Visit for the most up-to-date technical information. FORM NO. EC117 Updated: 10 March 2010