TYPE KAB Type KAB micro fuse is designed for circuit protection against excessive current in portable electronic equipment, electronic circuit around battery, etc. because the demand for high capacity batteries is increasing. Further miniaturization and low profile with extended rated range can be used for wider application. Also, the ecology design of Type KAB is friendly to environment due to complete lead free. FEATURES. New type fuses developed by our original technology. They show no variation in fusing characteristics and have excellent fastblow capability.. Surface temperature rise is 75 C or less when applying rated current. This offers less influence on the peripheral units.. The fuses come in ultrasmall size 608 (.6 0.8 0.45 mm) and 0 (.0.5 0.5 mm). 4. Suitable for automatic mounting 5. Precise dimensions allows high-density mounting and symmetrical construction of terminals provide Self-Alignment. 6. Resistance to soldering heat : Reflow or flow soldering 0 seconds at 60 C 7. High accuracy carrier tape by using pressed pocket paper ensures excellent mounting. 8. LEAD-FREE and RoHS Compliant RATING Item Rating Category Temperature Range Rated Current Rated Voltage Voltage Drop Insulation Resistance (between Terminals and Case) Fusing Characteristics Clearing Characteristics -40 ~ +5.6 0.8 0.-0.5-0.5-0.4-0.5-0.6-0.8-.0-.5-.6-.0-.5-.5-4.0-5.0-6.A.0.5 0.-0.5-0.5-0.4-0.5-0.6-0.8-.0-.5-.6-.0-.5-.5-4.0-5.0A 4VDC, VDC, 50VDC Refer to CATALOG NUMBERS AND RATING 000MΩ or more Fusing within min if the current is 00% of rated current. Breaking voltage:4v, V, 50V Breaking current:50a ORDERING INFORMATION K A B 0 0 N A 9 0 0 Type Code Voltage Code Rated current Code Rated current Code Packaging type Code Case size Special product code KAB 40 4V 0 0. A.5 A NA φ80 Real 9.6 0.8 0 V 5 0.5 A 6.6 A.0.5 500 50V 0.5 A 0.0 A 40 0.4 A 5.5 A 50 0.5 A.5 A 6 0.6 A 40 4.0 A 80 0.8 A 50 5.0 A 0.0 A 6 6. A 00 The special product code 00 indicates lead-free terminals.
CATALOG NUMBERS AND RATING November, 00 Catalog number Case size Rated current A Internal resistance mω (Typical) Voltage drop mv (Max.) KAB 500 0 9 00.6 0.8 0. 60 405 KAB 500 5 9 00.6 0.8 0.5 85 55 KAB 500 9 00.6 0.8 0.5 50 75 KAB 500 40 9 00.6 0.8 0.4 0 80 KAB 500 50 9 00.6 0.8 0.5 0 40 KAB 0 6 9 00.6 0.8 0.6 5 5 KAB 0 80 9 00.6 0.8 0.8 00 0 KAB 0 0 9 00.6 0.8.0 80 0 KAB 0 9 00.6 0.8.5 60 0 KAB 0 6 9 00.6 0.8.6 46 0 KAB 0 0 9 00.6 0.8.0 5 0 KAB 40 5 9 00.6 0.8.5 7 0 KAB 40 9 00.6 0.8.5 0 0 KAB 40 40 9 00.6 0.8 4.0 5 0 KAB 40 50 9 00.6 0.8 5.0 0 KAB 40 6 9 00.6 0.8 6. 0 0 KAB 40 0 00.0.5 0. 740 480 KAB 40 5 00.0.5 0.5 80 475 KAB 40 00.0.5 0.5 800 75 KAB 40 40 00.0.5 0.4 440 55 KAB 40 50 00.0.5 0.5 60 70 KAB 40 6 00.0.5 0.6 75 50 KAB 40 80 00.0.5 0.8 0 45 KAB 40 0 00.0.5.0 90 5 KAB 40 00.0.5.5 67 0 KAB 40 6 00.0.5.6 48 0 KAB 40 0 00.0.5.0 6 5 KAB 40 5 00.0.5.5 8 0 KAB 40 00.0.5.5 05 KAB 40 40 00.0.5 4.0 6 95 KAB 40 50 00.0.5 5.0 0 60 For taping specification, the package code (NA) is entered. One reel contains 5000 pcs. UL/cUL approved File No.E70 Rated voltage VDC 50 4 Breaking current A 50 4 50 DIMENSIONS P P L MARKING P P T W Main Body : Alumina ceramic Terminal:Tin plating Case size Case code L W T max. P CONSTRUCTION (mm) 608 9.6 ± 0. 0.8 ± 0. 0.45 0. ± 0. 0.0 ± 0..5 ± 0. 0.5 0. ± 0. Code : Rated current Code : Rated current P : 0. A W :.5 A Q : 0.5 A X :.6 A R : 0.5A :.0 A S : 0.4 A Y :.5 A T : 0.5 A :.5 A U : 0.6 A 4 : 4.0 A V : 0.8 A 5 : 5.0 A :.0 A 6 : 6. A RECOMMENDED PAD DIMENSIONS Size 608 Size 0 a.0.4 b..65 c.0. (mm) Protective coating Body STANDARD TEST BOARD 00 mm Fuse element a mm Terminal 5 mm mm Name Material Fuse element Copper alloy Body Alumina ceramic Protective coating Silicone resin Terminal Tin plating Glass epoxy on one side Board thickness :.6mm Copper layer : 5 m Case size Size a 608. 0.5 (mm)
PERFORMANCE No. Item Performance Test method Temperature rise Temperature rise shall not exceed 75 C. Apply rated current. Current-carrying capacity Shall not open within hour. Apply rated current. Clearing characteristics 4 Voltage drop Arc shall not be continued. Marking shall be legible. 5 Fusing characteristics Fusing within min. 6 Insulation resistance 000 MΩ or more 7 Electrode strength (Bending) 8 Shear test 9 Substrate bending test 0 Solderability (Solder Wetting time) Solderability (new uniform coating of solder) Resistance to soldering heat Solvent resistance 4 Ultrasonic Cleaning 5 Vibration 6 Shock 7 Thermal shock 8 Atomizing salt water 9 Moisture resistance 0 Load life Stability Accelerated damp heat steady state Voltage drop is below the value specified in CATALOG NUMBERS AND RATING. Solder Wetting time : within sec. The dipping surface of the terminals shall be covered more than 95% with new solder. Marking shall be legible. Marking shall be legible. Marking shall be legible. Breaking voltage : Rated voltage Breaking current : 50 A Apply rated current. Apply 00% of rated current. (Ambient temperature : 0 ~ 0 C) Insulation resistance between terminals and case (alumina ceramic) Board supporting width : 90 mm Bending speed : Approx. 0.5 mm/sec Duration : 0 sec Bending : mm Applied force : 0 N (.04 kgf) Duration : 0 sec Tool : R0.5 Direction of the press : side face Supporting dimension :. mm (size 0) 0.8 mm (size 608) Applied force : 0 N (.0 kgf) Tool : R0.5 Direction of the press : thickness direction of product Solder : Sn Ag 0.5Cu Temperature : 45 ± C meniscograph method Solder : JISZ8 H60A, H60S, H6A Temperature : 0 ± C meniscograph method Solder : Sn Ag 0.5Cu Temperature : 45 ± C Dipping : sec. Solder : JISZ8 H60A, H60S, H6A Temperature : 0 ± C Dipping : sec. Dipping ( cycle) Preconditioning : 00 ~ 50 C, 60 sec Temperature : 65 ± C /6 ~ 7 sec Reflow soldering ( cycles) Preconditioning : ~ min, 80 C or less Peak : 60 C max, 5 sec Holding : 0 ~ 50 C, 0 ~ 40 sec Cooling : more than min Manual soldering Temperature : 400 ± 0 C Duration : ~ 4 sec Measure after hour left under room temp. and humidity. Dipping rinse Solvent : Isopropyl alcohol Duration : 90 sec Ultrasonic : 0mW/cm 8kHz Solvent : Isopropyl alcohol Duration : 60 sec Frequency range : 0 ~ 55 ~ 0 Hz/min Vibration amplitude :.5 mm Duration : hours in each of XYZ directions (total : 6 hours) Peak value : 490 m/s (50 G) Duration : m sec 6 aspects times (total : 8 times) 55 ± C : 0 min Room temperature : ~ min or les 5 ± C : 0 min Room temperature : ~ min or less Repeat above step for 0 cycles. Temperature : 5 ± C Concentration (weight ratio) : 5 ± % Duration : 4 hours Temperature : 85 ± C Humidity : 85 ± 5% RH Duration : 000 hours Temperature : 85 ± C Applied current : Rated current 70% Duration : 000 hours Temperature : 5 ± C Duration : 000 hours Temperature : 85 ± C Humidity : 85 ± 5% RH Applied current : Rated current 70% Duration : 000 hours
Fusing time (sec) 0.0A 0.5A 0.5A 0.40A 0.50A 0.6A 0.80A.00A.5A.60A.00A.50A.5A 4.00A 5.00A Fusing time (sec) 0.0A 0.5A 0.5A 0.40A 0.50A 0.6A 0.80A.00A.5A.60A.00A.50A.5A 4.00A 5.00A 6.0A FUSING CHARACTERISTICS Size 608 Reference 00 0 0. 0.0 0.00 0.000 0. 0 00 Applied current (A) Size 0 00 0 0. 0.0 0.00 0.000 0. 0 00 Applied current (A) 4
Joule integral (A s) Joule integral (A s) I T T CHARACTERISTICS 000 00 0 Size 608 6.0A 5.00A 4.00A.5A.50A.00A.60A.5A.00A 0.80A 0.6A 0.50A 0.40A 0.5A 0.5A 0.0A Reference 0. 0.0 0.00 0.000 0.000 0.00 0.0 0. 0 Fusing time(sec) 000 00 0 Size 0 5.00A 4.00A.5A.50A.00A.60A.5A.00A 0.80A 0.6A 0.50A 0.40A 0.5A 0.5A 0.0A 0. 0.0 0.00 0.000 0.000 0.00 0.0 0. 0 Fusing time (sec) 5
Fusing time (sec) Fusing time (sec) DISTRIBUTION OF FUSING CHARACTERISTICS KAB 40 0 n:58 pcs. 00 0 0. 0.0 0.00 0.000 0. 0 00 Applied current(a) DISTRIBUTION OF FUSING TIME KAB 40 0 n:00 pcs. 0. 00% of rated current ls applled. 0.0 400% of rated current ls applled. 0.00 0.000 0 0 40 60 80 00 Number of pieces 6
Derating factor (%) DETERMINATION OF RATED VALUE AND SELECTION OF MICRO FUSE (TYPE KAB) Determine the rated value of the microfuse, and select the correct microfuse for your circuit. If you select the correct microfuse, safety of your circuit can be ensured. How to determine the rated value of the microfuse is described below : Flow for fuse selection. Measurement of circuit values using acute device Measure the circuit values, such as operating current of the circuit.. Calculation from operating current From the obtained operating current and the category temperature, calculate the minimum rated value to determine the applicable fuse.. Calculation from overload current From the obtained overload current, calculate the maximum rated value to determine the applicable fuse. 4. Calculation from inrush current From the inrush current, calculate the minimum rated value to determine the applicable fuse. 5. Final determination of rated value From the calculation results of steps through 4, determine the rated value. 6. Operation check using actual device After selecting the rating, confirm if the device works properly under the pre-determined conditions. Fuse selection. Measurement of circuit values using actual device Before determining the rated value of the fuse, preliminarily measure the following using the actual device. Operating current Using an oscilloscope or equivalents, measure the operating current of the circuit. Overload current Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit. Inrush current Using an oscilloscope or equivalents, measure the inrush current of the circuit at power-on or power-off. In addition, determine the number of inrush current applied. 4 Category temperature Measure the ambient temperature of the fuse circuit. EXAMPLE TO SELECT RATINGS OF TYPE KAB <Fuse selection> Effective operating current :. A Effective overload current : 6.0 A Inrush current waveform : Fig. A (Pulse width : ms, Wave height : 6.0 A) Numbers to withstand inrush current : 00,000 times Category temperature : 85 C ms 6.0A Fig. A : Inrush current waveform. Calculation from operating current Measurement of operating current Using an oscilloscope or equivalents, measure operating current (effective current) of the actual circuit. Example : Effective operating current =. A Derating Temperature derating factor Using Fig. B, find the temperature derating factor correspond to the temperature. 40 0 00 80 Fig. B Use Formula to calculate the rated current of the fuse to be used for the circuit. Rated current of fuse Operating current/ ( )... Formula ) Example : Category temperature = 85 C, Operating current =. A Temperature derating factor = 0.90 (Refer to Fig. B.) Rated derating factor = 0.75 Calculation using Formula : Rated current./ (0.90 0.75) =.78 A 60 40 KAB temperature derating 0 0-50 -5 0 5 50 75 00 5 Temperature( ) 7
. Calculation from overload current Measurement of overload current Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit. Example : Effective overload current = 6.0 A Calculation from overload current Determine the rated current so that the overload current can be times larger than the rated current. Use Formula to calculate the rated current of the fuse. Rated current of fuse Overload current/.0... Formula Example : Overload current = 6.0 A Use Formula to calculate the rated current. Rated current 6.0/.0 =.0 A The above calculation result shows that the fuse with rated current of.0 A or less should be selected for this circuit. Type KAB, with rated current of.5 A or less can be selected. 4. Calculation from inrush current 4 Measurement of inrush current waveform Using an oscilloscope or equivalent, measure the waveform of the inrush current of the actual circuit. 6A 4 Creation of approximate waveform Generally, the waveform of inrush current is complicated. For this reason, create the approximate waveform of inrush current as shown on Fig. C to simplify calculation. 4 Calculation of I t of inrush current Calculate I t (Joule integral) of the approximate waveform. The formula for this calculation depends on the approximate waveform. Refer to Table A. ms Fig. C : Inrush current waveform Red line : Actual measurement waveform Black line : Approximate wave Example : Pulse applied = ms, Peak value = 6.0 A, Approximate waveform = Triangular wave Since the approximate waveform is a triangular wave, use the following formula for calculation I t of rush current = / Im t... Formula (Im : Peak value, t : Pulse applying time) Use Formula to calculate the I t of the rush current : I t = / 6 6 0.00 = 0.0 (A s) JOULE-INTEGRAL VALUES FOR EACH WAVEFORM Name Waveform t Name Waveform t Sine wave ( cycle ) 0 m t m t Trapezoidal wave 0 t t t m Table A m t + m (t -t ) + m (t -t ) Sine wave (half cycle) 0 t m m t Various wave 0 t t + ( - ) t Triangular wave 0 t m m t Various wave 0 t t t t +{ + ( - ) } (t -t )+ (t -t ) Rectangular wave 0 t m m t Charge/ discharge waveform 0.68 m m i (t) = m e -t/τ 0 τ -t m τ * Following formula is generally used for calculation of t as i(t) equal to current. t= 0 t i (t)dt 8
Joule integral (A s) Numbers of pulse resistance (cycle) 4 4 Search of load ratio Set up the number of cycles to withsand. (generally 00,000 times) Obtain the load ratio from Pulse resistance characteristics. (Fig. D) Example : 00,000 times is required against inrush current applied. PULSE RESISTANCE CHARACTERISTCS 000000 Fig. D Determine the load ratio using Fig. D. If the rated current is 0. ~.0 A : 0% or less If the rated current is.5 ~ 4.0 A : 6% or less If the rated current is 5.0 ~ 6. A : % or less 00000 0000 0.5A~.0A.5A~4.0A 5.0A~6.A 000 00 0 0 0 0 0 40 50 60 70 80 90 00 Load ratio (%) 4 5 Calculation from Joule integral and load ratio Use Formula 4 to calculate the standard I t for the fuse to be used. Standard I t of fuse > (I t of inrush current/load ratio)......formula 4 Example : I t of pulse = 0.0 A s, Required load ratio = 0% (at 0. ~.0 A Fuse), 6% (at.5 ~ 4.0 A Fuse) or % (at 5.0 ~ 6. A Fuse) Example of.0 A Fuse : Use Formula 4 to calculate the standard I t of fuse. Standard I t of fuse > 0.0/0. = 0.04 (A s) The standard I t of the fuse should be 0.04 (A s) or more. Since the rush pulse applied is ms, obtain the intersection of ms (horizontal axis) and 0.04 A s (vertical axis) from Fig. E (refer to the arrow shown on Fig. E). *Fig. E shows the Joule integral curves for size 608. For size 0, use the Joule integral curves for the size. JOULE INTEGRAL VS. FUSING TIME 000 00 0 0. Joule Integral Curves for size 608 Fig. E 6.0A 5.00A 4.00A.5A.50A.00A.60A.5A.00A 0.80A 0.6A 0.50A 0.40A 0.5A 0.5A 0.0A Select a fuse whose curve is above the intersection. Type KAB, with rated current of.6 A or more should be selected. 5. Final determination of rated value Determine the rated current of the microfuse. The rated current should meet all the above calculation results. Example : Rated current of.0 A and.5 A meet the all requirements. 0.0 0.00 0.000 0.000 0.00 0.0 0. 0 Fusing time(sec) 6. Operation check using actual device After selecting the rating, confirm if the device works properly under the pre-determined conditions. 9
Application Notes for Micro Fuse. Circuit Design 5. Caution During Usage Micro Fuse should be designated only after confirming () Micro Fuse with electricity should never be touched. Micro operating conditions and the Micro Fuse performance Fuse with electricity may cause burning due to the Micro characteristics. Fuse high temperature. Also, in case of touching Micro When determining the rated current, be sure to observe the Fuse without electricity, please check the safety following items : temperature of Micro Fuse. () Micro Fuse should always be operated below the rated () Protective eyeglasses should always be worn when current (the value considered in the temperature derating performing fusing tests. However, there is a fear that Micro rate) and voltage specifications. According to item,- Fuse will explode during test. During fusing tests, please in page 7. cover particles not to fly outward from the board or testing () Micro Fuse should always be operated below the rated fixture. Caution is necessary during usage at all times. voltage. () Micro Fuse should be selected with correct rated value to 6. Environmental Conditions be fused at overload current. () Micro Fuse should not be operated in acid or alkali corrosive (4) When Micro Fuse are used in inrush current applications, atmosphere. please confirm sufficiently inrush resistance of Micro Fuse. () Micro Fuse should not be vibrated, shocked, or pressed (5) Please do not apply the current exceeding the breaking excessively. current to Micro Fuse. () Micro Fuse should not be operated in a flammable or (6) Use Micro Fuse under the condition of category explosive atmosphere. temperature. (4) After mounting Micro Fuse on a board, covering Fuses with (7) Micro Fuse should not be used in the primary power source. resin may affect to the electric characteristics of the Micro Fuse. Please be sure to evaluate it in advance. Micro Fuse should be selected by determining the 7. Emergency operating conditions that will occur after final assembly, or estimating potential abnormalities through cycle testing. In case of fire, smoking, or offensive odor during operation, please cut off the power in the circuit or pull the plug out.. Assembly and Mounting During the entire assembly process, observe Micro Fuse 8. Storage body temperature and the heating time specified in the () Micro Fuse should be stored at room temperature (-0 C ~ performance table. In addition, observe the following items : +40 C) without direct sunlight but not in corrosive atmosphere () Mounting and adjusting with soldering irons are not such as H S(hydrogen sulfide)or SO (sulfur dioxide). recommendable since temperature and time control is Direct sunlight may cause decolorization and deformation of difficult. the exterior and taping. Also, there is a fear that solderability In case of emergency for using soldering irons, be sure to will be remarkably lower in high humidity. observe the conditions specified in the performance table. () If the products are stored for an extended period of time, () Micro Fuse body should not have direct contact with a please contact Matsuo Sales Department for soldering iron. recommendation. The longer storage term causes () Once Micro Fuse mounted on the board, they should never packages and tapings to worsen. If the products are stored be remounted on boards or substrates. for longer term, please contact Matsuo Sales Department (4) During mounting, be careful not to apply any excessive for advice. mechanical stresses to the Micro Fuse. () The products in taping, package, or box should not be given any kind of physical pressure. Deformation of taping. Solvents or package may affect automatic mounting. For cleaning of Micro Fuse, immersion in isopropyl alcohol for 90 seconds (at 0 ~ 0 C liquid temp.) will not be 9. Disposal damaged. When Micro Fuse are disposed of as waste or scrap, they If organic solvents (Pine Alpha TM, Techno Care TM, Clean should be treated as industrial waste. Micro Fuse contain Through TM, etc.) will be applied to the Micro Fuse, be sure various kinds of metals and resins. to preliminarily check that the solvent will not damage the Micro Fuse. 0. Samples Micro Fuse received as samples should not be used in any 4. Ultrasonic Cleaning products or devices in the market. Samples are provided Ultrasonic cleaning is not recommended for Micro Fuse. for a particular purpose such as configuration, confirmation This may cause damage to the Micro Fuse such as broken of electrical characteristics, etc. terminals which results in electrical characteristics effects, etc. depending on the conditions. If Ultrasonic cleaning process must be used, please evaluate the effects sufficiently before use. MATSUO R MATSUO ELECTRIC CO., LTD. Please feel free to ask our sales department for more information on the Micro Fuse. Overseas Sales Dep. 5-,-Chome,Sennari-cho,Toyonaka-shi,Osaka 56-8558,Japan Tel : 06-6-088 Fax : 06-6-090 Head office 5-,-Chome,Sennari-cho,Toyonaka-shi,Osaka 56-8558,Japan Tel : 06-6-087 Fax : 06-6-86 URL http://w w w.ncc-matsuo.co.jp/ Specifications on this catalog are subject to change without prior notice. Please inquire of our Sales Department to confirm specifications prior to use. 0