Subject: Obsolescence of TE FT600 series and Littelfuse 461 series as direct replacement

1 st August, 2016 From: Littelfuse Product Management Subject: Obsolescence of TE FT600 series and Littelfuse 461 series as direct replacement This is a 90-day Obsolescence notice for TE s FT600 series. PCN number : 01082016 With the acquisition and integration of TE Circuit Protection Devices business unit into Littelfuse, we are working on the consolidation of similar product series fuses. Both the FT600 series fuses from TE and Littelfuse s existing 461 Telecom series fuses have the below followings in common; - Same electricals - Same physical dimensions With the above same specifications, the TE FT600 series would be obsoleted and replaced by the Littelfuse direct replacement of its 461 series. Please see below table on the direct crosses for the TE FT600 series to Littelfuse s 461 series. TE Order Part number TE Series Part number LF Part number D97371-000 FT600-0500-2 D72863-000 FT600-1250-2 D29077-000 FT600-2000-2 0ER 0ER 0461002.ER Dates and Timeframe The effective start date of this notification is 1 st August 2016. Last time buy is 1 st October 2016. Best regards, Daniel Wang Director Global Product Management Electronics Business Unit Dwang@Littelfuse.com

Surface Mount Fuses Surge Resistant > 461 Series TeleLink Fuse 461 Series TeleLink Fuse RoHS Description 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. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 Electrical Characteristics for Series.5A - 2A 29862.5A - 2A % of Ampere Rating Opening Time 100% 4 hours, Minimum 250% 1 sec., Min.; 120 secs., Max. Maximum Temperature Rise Telecom Nano 2 Fuse Temperature Reading 0 < 82 C (180 F) 0461002. < 50 C (122 F) Higher Currents and PCB layout designs can affect this parameter. Readings are measured at rated current after temperature stabilizes. Additional Information Features Surface mount surge resistant Slo-Blo fuse Meet UL 60950 3rd Edition power cross requirements standard alone Designed to allow compliance with Telcordia GR-1089-CORE and TIA- 968-A (formerly FCC Part 68) Surge Specifications Provide coordinated protection with Littelfuse SIDACtor Transient Voltage Suppressor (TVS)or a Greentube TM Gas Plasma Arrestor, without series resistors Designed to serve the requirements of a wide range of telecommunication and Applications networking equipment 2A rating has improved temperature rise performance under 2.2A surge current testing when compared with 1.25A rating Product is Halogen Free and RoHS compliant and compatible with leadfree solder and higher temperature profiles when ordered with Standard Silver Plated Brass Caps Standard product is RoHS Compliant and compatible with lead-free solders and higher temperature profiles T1/E1/J1 and HDSL2/4 Datasheet Resources Samples 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 10/100/1000BaseT POTS applications such as modems, answering machines, telephones, fax machines, and security systems ISDN U interface Baystation T1/E1/J1, T3 (DS3) trunk cards 2015 Littelfuse, Inc. Specifications are subject to change without notice. Specifications Application are subject testing is to strongly change recommended. without notice. Revised: 05/18/15

Surface Mount Fuses Surge Resistant > 461 Series TeleLink Fuse Electrical Specifications by Item Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals 0.500.500 600 50A @ 250 VAC 0.560 0.840 1 x x 1.25 1.25 600 60 A @600 VAC.1040 16.5 1 x x 2.00 002. 600 100 A @80 VDC.0450 17.5 1 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). Typical inductance <40nH up to 500 MHz. Resistance changes 0.5% for every C. Resistance is measured at 10% rated current. Temperature Re-rating Curve Average Time Current Curves 100.500A 1.25A 2A 10 TIME IN SECONDS 1 0.1 0.01 Note: 1. Re-rating depicted in this curve is in addition to the standard re-rating of 25% for continuous operation. 0.001 0.1 1 10 100 1000 CURRENT IN AMPERES GR 1089 Inter-building requirements GR 1089 1st 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 1 600 100 10/1000 25 1.25, 2.0 2 1000 100 10/360 25 1.25, 2.0 3 1000 100 10/1000 25 1.25, 2.0 4 2500 500 2/10 10 1.25, 2.0 5 1000 25 10/360 5 0.5, 1.25, 2.0 If sufficient series resistance is used, then the 0.5 fuse may be used in test conditions 1-4. GR 1089 2nd 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 5000 500 2/10 1 0.5, 1.25, 2.0 Alternative 5000 500/8=625 8/10 1 0.5, 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. 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/18/15

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 1 50 0.33 1 15 min. removed 1.25, 2.0 2 100 0.17 1 15 min. removed 1.25, 2.0 3 200,400, 600 1 60 1 sec. removed 1.25, 2.0 4 1000 1 60 1 sec. operative 1.25, 2.0 5 Diagram Diagram 60 5 secs. removed 1.25, 2.0 6 600 0.5 1 30 secs. removed 1.25, 2.0 7 440 2.2 5 2 secs. removed 1.25, 2.0 8 600 3 1 1.1 secs. removed 1.25, 2.0 9 1000 5 1 0.4 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 1 120,277 25 15 min. 0.5, 1.25, 2.0 2 600 60 5 secs. 0.5, 1.25, 2.0 3 600 7 5 secs. 0.5, 1.25, 2.0 4 100-600 2.2 15 min.. 0.5, 1.25, 2.0 5 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 800 10 560 100 1 ea. polarity 1.25 Longitudinal A 1500 10 160 200 1 ea. polarity 1.25 Metallic B 1000 9 720 25 1 ea. polarity 1.25 Longitudinal B 1500 9 720 37.5 1 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. UL 60950 requirements UL60950 (EN 60950) (formerly UL 1950) Power Cross (L = longitudinal, M = metallic) Test Number Voltage (V) Current (A) Time Fuse Choices L1 600 40 1.5 secs. 0.5, 1.25, 2.0 L2 600 7 5 secs. 0.5, 1.25, 2.0 L3 600 2.2 30 min. 0.5, 1.25, 2.0 L4 200 2.2 30 min. 0.5, 1.25, 2.0 L5 120 25 30 min. 0.5, 1.25, 2.0 M1 600 40 1.5 secs. 0.5, 1.25, 2.0 M2 600 7 5 secs. 0.5, 1.25, 2.0 M3 600 2.2 30 min. 0.5, 1.25, 2.0 M4 600 2.2 30 min. 0.5, 1.25, 2.0 Selection of test number depends on current limiting F fire enclosure/spacing of end product 26 AWG line cord removes L1/M1 test requirement L5 conducted only if product does not pass section 6.1.2 L2,M2,L3,M3,L4,M4 conducted if not in a fire enclosure Fuse must open before the wiring simulator fuse (MDL 2.0). Dimensions 3.12 (.123") 10.10 (.397") LF 1.25A T 1.70 typ (.067") 3.12 (.123") 3.25 (.128") 6.10 (.240") 12.6 (.496") 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 2500 62.5 10 700ms +/- 10 w/60 secs. rest 0.5, 1.25, 2.0 Non handheld 1500 37.5 10 700ms +/- 10 w/60 secs. rest 0.5, 1.25, 2.0 Steady-State For handheld units 1500 60Hz 0.5, 1.25, 2.0 Non handheld 1000 60Hz 0.5, 1.25, 2.0 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/18/15

Temperature Surface Mount Fuses Surge Resistant > 461 Series TeleLink 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 ) 60 120 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 ) 60 90 seconds Peak Temperature (T P ) 260 +0/ 5 C 25 time to peak temperature (t 25ºC to peak) Time Time within 5 C of actual peak Temperature (t p ) 20 40 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 Thermal Shock Mechanical Shock High Frequency Vibration Body: Ceramic Terminations: Silver-plated Caps Brand Logo, Ampere Rating, T -55 C to 125 C Level 1, J-STD-020C IEC-60127-4 (215 C immersion, 3 seconds) IPC / EIA J-STD-002-Test D 260 C for 120 seconds MIL-STD-202, Method 107, Test Condition B, -55 C to +125 C, 30 minutes @ 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 Part Numbering System SERIES AMP Code * Refer to Electrical Characteristics table QUANTITY Code E = 2500 pcs PACKAGING Code R = Tape and Reel 0461 1.25 E R *Example: 2 amp product is 0461002.ER (1.25 amp product shown above) Moisture Resistance Terminal Strength Terminal Attachment 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 Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 24mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 2500 ER 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/18/15

SQUARE NANO TELECOM 461 SERIES VALIDATION REPORT & TECHNICAL DATA 2

VALIDATION AND TECHNICAL DATA FOR THE LITTELFUSE SQUARE NANO TELECOM 461 SERIES FUSE 1.0 INTRODUCTION This report has been prepared by the Quality Assurance Department at the Littelfuse world headquarters in Des Plaines, Illinois. Littelfuse, Inc. follows the Quality Function Deployment design method, the six sigma strategies for defect prevention, as well as the procedures set by the ISO 9000 and ISO 9002 certifications it has earned. The equipment in the Quality Assurance Department is maintained and calibrated per ANSI Z540-1. The tests performed to validate this new design conform to the following documents, with exceptions where noted: 1) The Underwriters Laboratories UL/CSA/ANSI 248 Low Voltage Fuses Standard For Safety, used in accordance with the National Electrical Code NFPA 70 (NEC), and the Canadian Electrical Code, Part 1, (CEC). 2) The Department of Defense MIL-STD-202F Test Methods for Electronics and Electrical Component Parts. 3) The EIA Standard EIA/IS-722 Low Voltage Supplemental Fuse Qualification Specification. 4) IEC Standard IEC-60127-1, Part 1: Definitions for Miniature Fuses and General Requirements for Miniature Fuse-Links. 5) IEC Standard IEC-60127-4, Part 4: Universal Modular Fuse-Links (UMF). 6) Environmental Testing Standard IEC-60068, Part 2-58: Tests Test Td Test Methods for Solderability, Resistance to Dissolution of Metallization and to Soldering Heat of Surface Mounting Devices (SMD). 7) IPC / EIA J-STD-002A Solderability Tests for Component Leads, Terminations, Lugs, and Wires. 8) Telcordia Technologies (formerly Bellcore) GR-1089-CORE, Electromagnetic Compatibility and Electrical Safety Generic Criteria for Network Telecommunications Equipment. 9) FCC Telecommunication Standard 47, Part 68: Telephone Line Surge Type B-(1) Metallic. 10) Littelfuse, Inc. Specification No. VS-006005; Validation Specification for Surface Mount Fuses The tests for this report were selected to demonstrate that the 461 Series Square Nano Telecom has met or exceeded the following fuse characteristics commonly expected from today s electronics industry leaders: 3

Robustness Performance Safety If you have any questions about this document we welcome you to call the Quality Assurance Department at Littelfuse. Tel 847-824-1188. 2.0 TEST DESCRIPTIONS PRELIMINARY All fuses, regardless of subsequent testing are measured for initial cold resistance. This is performed by means of a 4-terminal network and a calibrated digital ohmmeter. The fuse is placed in a suitable nest, oriented so that the fuse terminals are accessible to the network probes. A reference current of no more than 10% of the fuse current rating is applied for this measurement. Only fuses that fall within published limits for resistance are used in the performance of the tests that follow. Unless otherwise specified, fuses are mounted to multi-position printed circuit boards prior to submission to testing. Fuses are mounted using Kester Type R244 NC SnPb Alloy 63/37, 86%, mesh 325+500 solder paste and the attached IR reflow profile. The mounted fuses are then allowed to cool for a minimum of one hour before the initial onboard resistance measurements are taken. This second set of readings is taken by placing the boards into a clamshell fixture with bed of nails probes. These probes contact the lands on the reverse side of the board, which are electrically connected to the fuse terminals. These probes form a 4-terminal network, similar to the one described above. These initial on-board resistance readings form the baseline measurements to which all subsequent measurements are referenced. Where testing specifies loose fuses, only the unmounted resistance measurements are taken. Figure 1: IR Reflow Profile 4

2.1 CURRENT CARRYING CAPACITY The current carry capacity test is conducted to ensure that the fuses will not open prematurely. The fuses are required to withstand 4 hours at 100 % of rated current even though it is recommended that fuses be not operated continuously at more than 75 % of rated current. Performed in accordance with Littelfuse Specification No. VS-006005. 2.2 OVERLOAD OPERATION Fuses are subjected to an overload current equal to 250% of the fuse rating to verify that the fuses will open before damage occurs in a circuit due to a sustained overload condition. These opening times verify the fuse will operate as specified; they should not be taken as absolutes for designing circuits, as slight variations can be expected from lot to lot. The solder connections of the same fuses to the PC boards are then visually inspected for wetting and mechanical integrity. Performed in accordance with U.L. 248-14 (Supplemental Fuses). Solder joint inspection in accordance with IEC-60127-1, Clause 8.5. 2.3 INTERRUPTING ABILITY The bulk of the interrupting tests are addressed in para. 2.18, Power Line Cross Capability. The test conditions described in this section are intended to supplement those tests. In addition to verifying interrupting capacity, the 600 Vac / 40 amp test at unity power factor and random closing angle described below is used as a performance test. This short circuit condition is one of two performance tests to which fuses are subjected after undergoing the various electrical, mechanical, and environmental tests described in the paragraphs below (see also the Lightning Surge test para. 2.4). The short circuit test is performed to ensure that the fuses safely operate and protect the circuit when subjected to various currents and voltages. The fuse should not rupture or burn. Performed in accordance with U.L. 248-14 (Supplemental Fuses). Note: For this application, the following exceptions are taken to the Littelfuse specification: All AC short circuit tests are performed at unity power factor. The DC test is done with less than a 1 millisecond time constant. All short circuit tests are performed using a 5 second open circuit hold voltage. In order to meet the application specific requirements for this product, separate groups of fuses are tested to the following conditions (worst case closing angle except where noted): 250 Vac / 50 amps 5

2.4 LIGHTNING SURGE 600 Vac / 60 amps 600 Vac / 60 amps, random closing angle 600 Vac / 40 amps, random closing angle The bulk of the lightning surge tests are addressed in para. 2.17, Lightning Surge Withstand Capability. This test in this paragraph is one of two performance tests to which fuses are subjected after undergoing the various electrical, mechanical, and environmental tests described below (see also Interrupting Ability para. 2.3). This test is designed to ensure that the fuses are capable of withstanding brief surges of high voltage and current, as would be experienced during a close proximity lightning strike. The inrush pulse would be of a short duration, high current spike, which then decays to a lesser value, all at high voltage. Standard/Test, Lightning Surge Surge Parameters Surge Voltage (Vpk) Surge Current (Ipk) Waveform, Max. Rise/Min. Decay (microsecond) Repetitions, Each Polarity GR-1089-CORE 1 st Level, Test 3 +/-1000 100 10/1000 25 FCC 47 Part 68 Type B Metallic +/-1000 25 5x320(I), 9x720(V) 1 For the 1.25 amp rated fuse, testing is conducted in accordance with the Telcordia GR-1089-CORE specification. Τhe surge pulse is shaped and generated with a Series 100 E-Class ECAT ESD-EFT-Surge-PQF Control Center. Monitoring of the circuit is done using a Tektronix Model TDS 3012 2-channel digital phosphor oscilloscope. The ½ amp rated fuses are tested using the FCC 47, Part 68, Type B Telephone Line Surge. Testing to the FCC specification is done off-site. 2.5 INSULATION RESISTANCE This test ensures that fuses that have operated (opened) have done so with no evidence of internal carbon tracking or any phenomenon which would provide a high resistance current path, or any means by which current is re-established in the opened circuit through the open fuse. A 100 Vdc potential is applied to the fuse terminals, and the resistance is measured on a calibrated meg-ohmmeter. This test is performed on all fuses that have been subjected to testing, the desired end result of which is the opening of the fuse. All open fuses shall have an insulation resistance of no less than 10 k ohms after operating. Performed in accordance with Method 302 of MIL-STD-202, Test Condition A. 6

2.6 RESISTANCE TO MOISTURE This test is designed to ensure that the fuses are resistant to the effects of moisture, wetting and heat of tropical environments. These phenomena produce many types of deterioration, including corrosion of metals, physical distortion and decomposition of organic materials, leaching out and spreading of the constituents of materials, and detrimental changes in a component s electrical properties. On completion of the test, performance requirements are evaluated by subjecting half of the fuses to the Lightning Surge test of para. 2.4 above. The other half of the fuses is subjected to the Interrupting Ability test of para. 2.3 above. Performed in accordance with method 106F of MIL-STD-202F. (Exception per EIA/IS-722: 50 cycles of ambient conditions to 65 C/ 100% relative humidity). 2.7 THERMAL SHOCK (TEST CONDITION B) The thermal shock test is performed to determine the resilience of the fuses to the exposure to alternating extremes of high and low temperature such as might be encountered in equipment operated intermittently in low temperature environments or during transportation. Effects of thermal shock can include; Cracking and delamination of housings, opening of thermal seals, and changes in the component s electrical characteristics. Performed in accordance with Method 107G of MIL-STD-202F, Test Condition B : (Exception per EIA/IS-722: 200 cycles -55 C to 125 C, for 30 minutes each). On completion of the test, performance requirements are evaluated by subjecting half of the fuses to the Lightning Surge test of para. 2.4 above. The other half of the fuses is subjected to the Interrupting Ability test of para. 2.3 above. 2.8 LIFE TEST This test is to determine the long-term robustness of the design by exposing the fuses to elevated temperature (70 C) for 1000 hours, while carrying 60% of the fuse rated current. Fuses shall not open during this test, nor shall it result in any physical damage as a result of the test. After testing the solder connections of the same fuses to the PC boards are then visually inspected for wetting and mechanical integrity. On completion of the test, performance requirements are evaluated by subjecting the fuses to the Interrupting Ability test of para. 2.3 above. Performed in accordance with Method 108 of MIL-STD-202 (See also EIA/IS- 722). Solder joint inspection in accordance with IEC-60127-1, Clause 8.5. 7

2.9 RESISTANCE TO SOLVENTS This test verifies that markings or color coding will not become illegible when the device is subjected to solvents and the processes normally used to clean solder-flux, fingerprints and other contaminants. In addition, this test establishes that protective coatings and encapsulated materials are not degraded to the point where electrical or mechanical integrity is altered from specifications. On completion of the test, performance requirements are evaluated by subjecting all of the fuses to the Lightning Surge test of para. 2.4 above, and then to the Interrupting Ability test of para. 2.3 above. Performed in accordance with method 215J of MIL-STD-202F. (Exception per EIA/IS-722: Measure shift in resistance after test). 2.10 MECHANICAL SHOCK / HIGH FREQUENCY VIBRATION Both mechanical shock and vibration tests are performed on the same group of fuses. Mechanical shock evaluates the ability of the fuses to withstand sudden, sharp physical blows, such as those that might be encountered during rough handling. The fuses are exposed to 18 half-sine shocks (6 in each of 3 mutually perpendicular axes), consisting of 50G peak acceleration, 11 millisecond duration. There is to be no physical or electrical damage to the fuses. After exposure to the above test, the same fuses are subjected to the high frequency vibration test of MIL-STD-202, method 204, Test Condition D. There is to be no physical or electrical damage to the fuses. On completion of the test, performance requirements are evaluated by subjecting all of the fuses to the Lightning Surge test of para. 2.4 above, and then to the Interrupting Ability test of para. 2.3 above. Mechanical shock performed in accordance with Method 213, Test Condition A of MIL-STD-202F. (Exception per EIA/IS-722: Measure shift in resistance after test). High frequency vibration performed in accordance with Method 204, Test Condition D of MIL-STD-202F. (Exception per EIA/IS-722: Measure shift in resistance after test). 2.11 TERMINAL STRENGTH The purpose of this test is to determine the robustness of the design when the fuses are subjected to physical flexing and stressing of the printed circuit boards on which they are mounted. The board bend test of EIA/IS-722, para. 4.5.5 is to be used. The board assembly (with fuse mounted) is placed between two supports with the component facing down. From above, a downward force is applied to the center of the board sufficient to cause a board deflection of 1 mm for 1 8

minute. There is to be no damaged to the fuse, or the solder connection to the board. No performance tests follow board bend. Performed in accordance with EIA/IS-722. 2.12 MATERIAL STRENGTH This test is designed to determine the effects of physical pressure being exerted directly onto the component. A 1 kg force is applied for 10 seconds to the center of the fuse housing, with the fuse oriented in an upright position. The fuses shall not crack, chip, break, or suffer other physical damage. On completion of the test, performance requirements are evaluated by subjecting half of the fuses to the Lightning Surge test of para. 2.4 above. The other half of the fuses are subjected to the Interrupting Ability test of para. 2.3 above. The tests that follow are performed on unmounted, previously untested fuses (except for initial cold resistance measurements). 2.13 SOLDERABILITY CAPABILITY These tests inspect the fuse terminations for acceptable wetting resulting from solder application. 2.13.1 IEC-60127-4 IR REFLOW SOLDER Loose unmounted parts are subjected to a 3 second 215 C IR reflow application as per IEC-60068-2-58, Test Td. No steam aging or preconditioning is required. The fuse terminations are visually inspected for solder wetting. This test is performed in accordance with IEC-60127-4, which in turn references IEC 60068-2-58. 2.13.2 HAND SOLDER Loose, unmounted parts are mounted to PC boards with a hand soldering application. The soldering gun is maintained at 350 C, and the heat is applied to the board at the point of the fuse terminations for 2 seconds on each terminal. The fuse terminations are visually inspected for solder wetting. On completion of the test, performance requirements are evaluated by subjecting half of the fuses to the Lightning Surge test of para. 2.4 above. The other half of the fuses are subjected to the Interrupting Ability test of para. 2.3 above. 9

2.14 RESISTANCE TO DISSOLUTION OF METALLIZATION Loose, unmounted parts are steam aged for 8 hours as per MIL-STD-202F, Method 208H, Category 3. Following this preconditioning, parts are dipped in the appropriate flux as specified in IPC / EIA J-STD-002A and exposed to the Resistance to Dissolution of Metallization Test D of the same specification. The solder pot is maintained at a temperature of 260 C. Dwell time is 120 seconds. The fuse terminations are visually inspected for solder wetting. This test is performed in accordance with MIL-STD-202F, Method 208H, Test Condition B (SMD); which in turn references IPC / EIA J-STD-002A Solderability tests for Component Leads, Terminations, Lugs and Wires. 2.15 RESISTANCE TO SOLDERING HEAT This test are designed to evaluate the robustness of the fuses when exposed to extreme conditions of heat, which might be encountered during a board mount operation. Fuses will be board mounted as a result of this test. Possible damaging effects of soldering heat are compromised electrical characteristics, mechanical damage to the fusing element, and cracks or loosening of the termination joints. Fuses are processed through an Infra-Red reflow oven with the profile settings adjusted so as to achieve a peak fuse body temperature of 230 C at 30 seconds maximum during a total 5 minute cycle. The fuses are visually inspected for signs of damage to the housings and / or terminations. On completion of the test, performance requirements are evaluated by subjecting half of the fuses to the Lightning Surge test of para. 2.4 above. The other half of the fuses are subjected to the Interrupting Ability test of para. 2.3 above. Performed in accordance with VS-006005. 2.16 TERMINAL ATTACHMENT A 2 Kg pull force is applied for 5 seconds to the end caps of loose, unmounted fuses. The fuse caps shall not separate, nor shall there be damage to the fuse housings. The fuses shall have continuity after this test. Performed in accordance with MIL-STD-202, Method 211, Test Condition A. 2.17 LIGHTNING SURGE WITHSTAND CAPABILITY Designed to allow compliance with Telcordia GR-1089-CORE Lightning Surge requirements. Test 3 from the First Level requirements represents the most severe condition. The test requires pulsing the fuse 50 times with a 10x1000 microseconds, 100A peak waveform. Verification testing was performed on 25 parts and exhibited no degradation in performance. Ten of those twenty-five parts were subjected to additional repetitions and allowed to continue until opening. 10

Minimum duration from the sample was 216 pulses. The Telecom Square Nano will also withstand the remaining less severe test conditions as outlined in the Telcordia GR-1089-CORE and the FCC 47 Part 68. They are referenced below, as well as the test results and conditions. An ECAT Model E509A manufactured by KeyTek was used to create the double exponential waveforms. Referencing Test 3 from the First Level Lightning Strike requirements of the Telcordia GR-1089-CORE document, the measured values are listed below. Specifications Measured Values 1. Double exponential waveshape. 1a. Maximum rise time of 10 microseconds 8.1 microseconds 1b. Minimum decay time of 1000 microseconds 1095 microseconds 2. Minimum peak open circuit voltage of 1000V 1007V 3. Minimum peak short circuit current of 100A 106.9A 4. The device under test must sustain 50 repetitions (25 repetitions in each polarity) without opening. Standard/Test, Lightning Surge Surge Voltage (Vpk) Surge Current (Ipk) Waveform, Max. Rise/Min. Decay (microsecond) Repetitions, Each Polarity Results, Number Passing GR-1089-CORE 1 st Level, Test 3 +/-1000 100 10/1000 25 25 of 25 Test 4 +/-2500 500 2/10 10 (See 2.17) GR-1089-CORE 2 nd Level, Test 1 +/-5000 500 2/10 1 (See 2.17) FCC 47 Part 68 Type A Metallic +/-800 100 10/560 1 10 of 10 FCC 47 Part 68 Type A Longitudinal +/-1500 200 10/160 1 10 of 10 2.18 POWER LINE CROSS CAPABILITY Designed to allow compliance with Telcordia GR-1089-CORE and UL 60950 (formerly UL 1950), 3 rd edition Power Cross requirements. Refer to the test conditions and table below for specific Power Line Cross information. A majority of the power cross testing was performed in the Littelfuse High Power Testing Laboratory. This facility is certified by Underwriter s Laboratories and is capable of performing all of the power line tests. Standard/Test, Power Cross Voltage (Vrms) Short-Circuit Duration Current (A) GR-1089-CORE 1 st Level, Test 1 50 0.33 15 minutes Test 2 100 0.17 15 minutes Test 3 200, 400, 600 1A at 600V 60 applications, 1 sec. Test 4 1000 1A 60 applications, 1 sec. Test 6 600 0.5A 30 seconds Test 7 600 2.2 2 seconds Test 8 600 3 1 seconds Test 9 1000 5 0.5 seconds GR-1089-CORE 2 nd Level, Test 1 120, 277 25 15 minutes Test 2 600 60 5 seconds Test 3 600 7 5 seconds Test 4 100-600 2.2 15 minutes UL 60950, 3 rd edition, Test 1 600 40 1.5 seconds Test 2 600 7 5 seconds Test 3 600 2.2 30 minutes, 7 hour max. 11

2.19 WETTING BALANCE This test is designed to quantitatively determine the solderability of terminations of surface mounted devices. The fuses are dipped individually into Type ROL0 flux for 5 to 10 seconds prior to exposure to solder. The excess flux is removed by blotting, and the parts are allowed to dry for 5 to 20 seconds before being immersed into the solder. Each fuse termination is immersed only once into the solder bath to a minimum depth of 0.10 mm. Dwell time is 5 seconds. The surface of the solder, stabilized at 235 C, is skimmed prior to immersion. During the immersion process, a solder meniscus force measuring device monitors T 0 (time to buoyancy corrected zero) and F5 (wetting force at five seconds from start of test). Acceptance criteria under IPC/EIA J-STD-002A, Test F Wetting Balance Test (Leadless Components) Set B is T 0 shall be 2 seconds or less. F5 at five seconds shall be 50 µn/mm or more. The fuse termination shall exhibit positive wicking beyond its immersion depth. Performed in accordance with IPC/EIA J-STD-002A, Test F, Set B. 12

Table 1 0.5 AMPERAGE ELECTRICAL TEST RESULTS Littelfuse Part No: Part Name: Prepared By: Date: 461 series Square Nano Telecom Fuses Blair Gannegan July 12, 2001 TEST TYPE ACCEPTANCE CRITERIA RESULTS SAMPLE SIZE TEST REPORT # 1. Current Carry Capacity Littelfuse Specification No. VS-006005 A. Carry 100% of rated current for a minimum of 4 hours at 25 C. B. Exhibit no charring or melting. 2. Overload Operation Littelfuse Specification No. VS-006005 (references UL 248-14) Fuses shall clear circuit within: A. 1 second min. / 120 seconds max. from the beginning of 250% overcurrent. B. Not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a D. After overload, pass IEC 60127-1 solder joint inspection. A. Fuses successfully carried 0.500 amps for 4 hours without opening. Maximum shift in resistance was 0.25%. B. No damage was observed. A. Min./Max. opening time at 250% : 3.34 sec. / 320.77 sec. One fuse of ten exceeded maximum opening time limits. B. No damage was observed. C. All 10 fuses > 100 k ohms. D. Solder joint after test was acceptable. 10 fuses 10 fuses TL-16619 Fuses TL-16619 Fuses 13

Table 2 0.5 AMPERAGE ELECTRICAL TEST RESULTS Littelfuse Part No: Part Name: Prepared By: Date: 461 series Square Nano Telecom Fuses Blair Gannegan July 12, 2001 TEST TYPE ACCEPTANCE CRITERIA RESULTS SAMPLE SIZE TEST REPORT # 3. AC Short Circuit Littelfuse Specification No. VS-006005 (references UL 248-14) A. Be capable of interrupting 50 amps at 250 VAC with a 0.95-1.0 power factor and an arcing angle representing worst case conditions. B. After opening, be capable of maintaining this condition for 5 seconds and shall not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a 4. AC Short Circuit Littelfuse Specification No. VS-006005 (references UL 248-14) A. Be capable of interrupting 60 amps at 600 VAC with a 0.95-1.0 power factor and an arcing angle representing worst case conditions. B. After opening, be capable of maintaining this condition for 5 seconds and shall not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a 5. AC Short Circuit Littelfuse Specification No. VS-006005 (references UL 248-14) A. Be capable of interrupting 60 amps at 600 VAC with a 0.95-1.0 power factor and a random angle. B. After opening, be capable of maintaining this condition for 5 seconds and shall not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a 6. AC Short Circuit Littelfuse Specification No. VS-006005 (references UL 248-14) A. Be capable of interrupting 40 amps at 600 VAC with a 0.95-1.0 power factor and a random closing angle. B. After opening, be capable of maintaining this condition for 5 seconds and shall not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a A. All 10 fuses successfully interrupted the circuit. B. All 10 fuses remained open for > 5 seconds. C. All 10 fuses > 100 k ohms. A. All 10 fuses successfully interrupted the circuit. B. All 10 fuses remained open for > 5 seconds. C. All 10 fuses > 100 k ohms. A. All 10 fuses successfully interrupted the circuit. B. All 10 fuses remained open for > 5 seconds. C. All 10 fuses > 100 k ohms. A. All 10 fuses successfully interrupted the circuit. B. All 10 fuses remained open for > 5 seconds. C. All 10 fuses > 100 k ohms. 10 fuses 10 fuses 10 fuses 10 fuses TL-16619 TL-16619 TL-16619 TL-16619 14

Table 3 0.5 AMPERAGE ENVIRONMENTAL TEST RESULTS Littelfuse Part No: Part Name: Prepared By: Date: 461 series Square Nano Telecom Fuses Blair Gannegan July 12, 2001 TEST TYPE ACCEPTANCE CRITERIA RESULTS SAMPLE SIZE TEST REPORT # 1. 70 C Extended Life Test 2. Moisture Resistance Test Littelfuse Specification No. MIL-STD-202, Meth 108 (references EIA/IS- 722) A. Be capable of carrying 60% rated current for 1000 hours at 70 C without opening or damage. B. After life test, pass IEC 60127-1 solder joint inspection. C. After life test, be capable of interrupting 40 Amps at 600 Vac with a 0.95 1.0 power factor and random closing. D. Have an insulation resistance of greater than 10K Ohms with a Littelfuse Specification No. MIL-STD-202, Meth 106 (references EIA/IS- 722) A. Be capable of withstanding 50 cycles of moisture resistance without opening or damage. Fuse resistance shift shall not exceed 10%. B. After Moisture Resistance, be capable of withstanding 2 lightning surge cycles (FCC 47, Part 68, Type B) without opening (1/2 of test group). C. After Moisture Resistance, be capable of interrupting 40 Amps at 600 Vac with a 0.95 1.0 power factor and random closing (1/2 of test group). D. Have an insulation resistance of greater than 10K Ohms with a 3. Thermal Shock Test Littelfuse Specification No. MIL-STD-202, Meth 107 (references EIA/IS- 722) A. Be capable of withstanding 200 cycles of thermal shock (-55 C / +125 C, each for 30 minutes) without opening or damage. Fuse resistance shift shall not exceed 5%. B. After Thermal Shock, be capable of withstanding 2 lightning surge cycles (FCC 47, Part 68, Type B) without opening (1/2 of test group). C. After Thermal Shock, be capable of interrupting 40 Amps at 600 Vac with a 0.95 1.0 power factor and random closing (1/2 of test group). D. Have an insulation resistance of greater than 10K Ohms with a A. All 40 fuses successfully passed this test. Maximum shift in resistance was 0.74%. B. Solder joint after test was acceptable. C. All 40 fuses successfully interrupted the circuit. D. All fuses > 100 k ohms. A. All 40 fuses successfully passed this test. Maximum shift in resistance after the test was 1.23%. B. All 20 fuses successfully passed lightning surge test. C. All 20 fuses successfully interrupted the circuit. D. All 20 fuses > 100 k ohms. A. All 40 fuses successfully passed this test. Maximum shift in resistance was 2.24% for 39 of 40 fuses. One fuse increased in resistance by 9.76% after this test. B. All 20 fuses successfully passed lightning surge test. C. All 20 fuses successfully interrupted the circuit. D. Following Short Circuit, all 20 fuses > 100 k ohms. 40 fuses 40 fuses. 20 fuses. 20 fuses. 20 fuses. 40 fuses. 20 fuses. 20 fuses. 20 fuses. TL-16594 TL-16594 TL-16594 15

Table 4 0.5 AMPERAGE ENVIRONMENTAL TEST RESULTS Littelfuse Part No: Part Name: Prepared By: Date: 461 series Square Nano Telecom Fuses Blair Gannegan July 12, 2001 TEST TYPE ACCEPTANCE CRITERIA RESULTS SAMPLE SIZE TEST REPORT # 4. Resistance to Solvents Test Resistance to solvents- MIL STD-202F, Method 215J A. Remain legible (marking) or identifiable (color coded). B. Not be mechanically compromised. C. After solvents tests, be capable of withstanding 2 lightning surge cycles (FCC 47, Part 68, Type B) without opening. D. After solvents tests, be capable of interrupting 40 Amps at 600 Vac with a 0.95 1.0 power factor and random closing. E. Have an insulation resistance of greater than 10K Ohms with a A. All 5 fuses successfully passed this test. B. Fuses were not mechanically compromised. C. All 5 fuses successfully passed lightning surge test. D. All 5 fuses successfully interrupted the circuit. E. All 5 fuses > 100 k ohms. 5 fuses TL-16619 16

Table 5 0.5 AMPERAGE ENVIRONMENTAL TEST RESULTS Littelfuse Part No: Part Name: Prepared By: Date: 461 series Square Nano Telecom Fuses Blair Gannegan July 12, 2001 TEST TYPE ACCEPTANCE CRITERIA RESULTS SAMPLE SIZE TEST REPORT # 5. Solderability - Hand Solder Test (Fuses mounted to PC boards by means of hand solder operation 350 C applied for 2 seconds, each terminal) Hand Solderability: A. Display adequate wetting over 95% of the surface area. Solder wetting shall be continuous. B. Remain electrically intact (retain continuity). C. Not be mechanically compromised. D. After solderability, be capable of withstanding 2 lightning surge cycles (FCC 47, Part 68, Type B) without opening (1/2 of test group). E. After solderability, be capable of interrupting 40 Amps at 600 Vac with a 0.95 1.0 power factor and random closing (1/2 of test group). F. Have an insulation resistance of greater than 10K Ohms with a A. Solder coverage was satisfactory for all 10 fuses. B. All 10 fuses had continuity after this test. C. Fuses were not mechanically compromised. D. All 5 fuses successfully passed lightning surge test. E. All 5 fuses successfully interrupted the circuit. F. All 5 fuses > 100 k ohm. 10 fuses. 10 fuses. 10 fuses. TL-16642 6. Solderability IEC standards (No pre-conditioning) IEC-60127-4 Solderability (IR reflow) 215 C immersion, 3 seconds A. Display adequate wetting over 95% of the surface area. Solder wetting shall be continuous. B. Remain electrically intact (retain continuity). C. Not be mechanically compromised. A. Wetting observed on both samples > 95%. B. Both samples electrically intact. C. Fuses were not mechanically compromised. 2 fuses TL-16642 7. Resistance to Dissolution of Metallization IPC/EIA standards (Test includes 8 hour steam aging of loose parts) Resistance to Dissolution of Metallization: IPC / EIA J-STD-002A Test D 260 C for 120 seconds. A. Display adequate wetting over 95% of the surface area. Solder wetting shall be continuous. B. Remain electrically intact (retain continuity). C. Not be mechanically compromised. Resistance to IR Reflow Solder Heat, 230 C for 30 seconds A. Remain electrically intact (retain continuity). B. Not be mechanically compromised. C. After solder heat, be capable of withstanding 2 lightning surge cycles (FCC 47, Part 68, Type B) without opening (1/2 of test group). D. After solder heat, be capable of interrupting 40 Amps at 600 Vac with a 0.95 1.0 power factor and random closing (1/2 of test group). E. Have an insulation resistance of greater than 10K Ohms with a A. Wetting observed on all ten samples > 95%. B. All fuses remained electrically intact. C. Fuses were not mechanically compromised. 10 fuses TL-16642 8. Resistance to IR Reflow Solder Heat (No pre-conditioning) A. All 10 fuses electrically intact. B. Fuses were not mechanically compromised. C. All 5 fuses successfully passed lightning surge test. D. All 5 fuses successfully interrupted the circuit. E. All 5 fuses > 1 Meg ohms. 10 fuses. 10 fuses. TL-16642 17

Table 6 0.5 AMPERAGE MECHANICAL TEST RESULTS Littelfuse Part No: Part Name: Prepared By: Date: 461 series Square Nano Telecom Fuses Blair Gannegan July 12, 2001 TEST TYPE ACCEPTANCE CRITERIA RESULTS SAMPLE SIZE TEST REPORT # 1. Mechanical Shock Mechanical Shock, MIL-STD-202, Method 213, Test Condition A Half- Sine, 50 G s, 11 msec duration A. Not be mechanically compromised. B. Not have a resistance shift in excess of 5%. 2. High Frequency Vibration (Same fuses subjected to Mechanical Shock Test) High Frequency Vibration, MIL-STD-202, Method 204, Test Condition D A. Not be mechanically compromised. B. Not have a resistance shift in excess of 5%. C. After vibration, be capable of withstanding 2 lightning surge cycles (FCC 47, Part 68, Type B) without opening (all fuses). D. After vibration, be capable of interrupting 40 Amps at 600 Vac with a 0.95 1.0 power factor and random closing (all fuses). E. Have an insulation resistance of greater than 10K Ohms with a 3. Terminal Strength Terminal Strength, Board Deflection per EIA / IS-722, 1 mm Deflection for 1 Minute A. Not be mechanically compromised. B. Not have a resistance shift in excess of 5%. 4. Terminal Attachment Terminal Attachment, MIL-STD-202, Method 211, Test Condition A, 5 Lbs. Applied to End Caps A. Not be mechanically compromised. 5. Material Strength Material Strength, 1 Kg Applied for 10 Seconds to Center of Housing A. Not be mechanically compromised. B. After Material Strength test, be capable of withstanding 2 lightning surge cycles (FCC 47, Part 68, Type B) without opening (1/2 of test group). C. After Material Strength test, be capable of interrupting 40 Amps at 600 Vac with a 0.95 1.0 power factor and random closing (1/2 of test group). D. Have an insulation resistance of greater than 10K Ohms with a A. Fuses were not mechanically compromised. B. Maximum shift in resistance was 0.11% A. Fuses were not mechanically compromised. B. Maximum shift in resistance was 0.36% C. All 5 fuses successfully passed lightning surge test. D. All 5 fuses successfully interrupted the circuit. E. All 5 fuses > 100 k ohms. A. Fuses were not mechanically compromised. B. Maximum shift in resistance was 3.87%. A. Fuses were not mechanically compromised. There was no damage, and end caps did not pull off. A. Fuses were not mechanically compromised. B. All 5 fuses successfully passed lightning surge test. C. All 5 fuses successfully interrupted the circuit. D. All 5 fuses > 100 k ohms. 5 fuses TL-16619 5 fuses TL-16619 15 fuses TL-16619 5 fuses TL-16642 10 fuses TL-16619 18

Table 7 1.25 AMPERAGE ELECTRICAL TEST RESULTS Littelfuse Part No: Part Name: Prepared By: Date: 461 series Square Nano Telecom Fuses Blair Gannegan July 12, 2001 TEST TYPE ACCEPTANCE CRITERIA RESULTS SAMPLE SIZE TEST REPORT # 1. Current Carry Capacity Littelfuse Specification No. VS-006005 A. Carry 100% of rated current for a minimum of 4 hours at 25 C. B. Exhibit no charring or melting. 2. Overload Operation Littelfuse Specification No. VS-006005 (references UL 248-14) Fuses shall clear circuit within: A. 1 second min. / 120 seconds max. from the beginning of 250% overcurrent. B. Not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a D. After overload, pass IEC 60127-1 solder joint inspection. A. Fuses successfully carried 1.25 amps for 4 hours without opening. Maximum shift in resistance was 0.48%. B. No damage was observed. A. Min./Max. opening time at 250% : 5.64 sec. / 319.65 sec. Two fuses of ten exceeded maximum opening time limits. B. No damage was observed. C. All 10 fuses > 100 k ohms. D. Solder joint after test was acceptable. 10 fuses TL16618 10 fuses TL16618 19

Table 8 1.25 AMPERAGE ELECTRICAL TEST RESULTS Littelfuse Part No: Part Name: Prepared By: Date: 461 series Square Nano Telecom Fuses Blair Gannegan July 12, 2001 TEST TYPE ACCEPTANCE CRITERIA RESULTS SAMPLE SIZE TEST REPORT # 3. AC Short Circuit Littelfuse Specification No. VS-006005 (references UL 248-14) A. Be capable of interrupting 50 amps at 250 VAC with a 0.95-1.0 power factor and an arcing angle representing worst case conditions. B. After opening, be capable of maintaining this condition for 5 seconds and shall not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a A. All 10 fuses successfully interrupted the circuit. B. Circuit remained open > 5 seconds. C. All 10 fuses > 100 k ohms. 10 fuses TL-16618 4. AC Short Circuit Littelfuse Specification No. VS-006005 (references UL 248-14) A. Be capable of interrupting 60 amps at 600 VAC with a 0.95-1.0 power factor and an arcing angle representing worst case conditions. B. After opening, be capable of maintaining this condition for 5 seconds and shall not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a A. All 10 fuses successfully interrupted the circuit. B. All 10 fuses remained open for > 5 seconds. C. All 10 fuses > 100 k ohms. 10 fuses TL-16618 5. AC Short Circuit Littelfuse Specification No. VS-006005 (references UL 248-14) A. Be capable of interrupting 60 amps at 600 VAC with a 0.95-1.0 power factor and a random angle. B. After opening, be capable of maintaining this condition for 5 seconds and shall not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a A. All 10 fuses successfully interrupted the circuit. B. All 10 fuses remained open for > 5 seconds. C. All 10 fuses > 100 k ohms. 10 fuses TL-16618 6. AC Short Circuit Littelfuse Specification No. VS-006005 (references UL 248-14) A. Be capable of interrupting 40 amps at 600 VAC with a 0.95-1.0 power factor and a random closing angle. B. After opening, be capable of maintaining this condition for 5 seconds and shall not restrike, arc, smoke, char or melt. C. Have an insulation resistance of greater than 10K Ohms with a A. All 10 fuses successfully interrupted the circuit. B. All 10 fuses remained open for > 5 seconds. C. All 10 fuses > 100 k ohms. 10 fuses TL-16618 20

Table 9 1.25 AMPERAGE ELECTRICAL TEST RESULTS Littelfuse Part No: Part Name: Prepared By: Date: 461 series Square Nano Telecom Fuses Blair Gannegan July 18, 2001 TEST TYPE ACCEPTANCE CRITERIA RESULTS SAMPLE SIZE TEST REPORT # 7. Lightning Surge Withstand Capability Telcordia GR-1089-CORE 1 st Level, Test 3 8. Lightning Surge Withstand Capability Telcordia GR-1089-CORE 1 st Level, Test 4 1 st Level, Test 3 A. Sustain 50 pulses @ ± 1000 Vpk, 100 amps Ipk, 10/1000 µsec. with no degradation in performance. 1 st Level, Test 4 A. Sustain 20 pulses @ ± 2500 Vpk, 500 amps Ipk, 2/10 µsec. with no degradation in performance. A. All fuses withstood 50 pulses. * 2 A. 10 of 10 fuses passed this test. 10 fuses. Telecom Nano Fuse rating only. Telecom Nano Fuse rating only. 9. Lightning Surge Withstand Capability Telcordia GR-1089-CORE 2 nd Level, Test 1 2 nd Level, Test 1 A. Sustain 2 pulses @ ± 5000 Vpk, 500 amps Ipk, 2/10 µsec. with no degradation in performance. A. 10 of 10 fuses passed this test. 10 fuses. Telecom Nano Fuse rating only. 10. Lightning Surge Withstand Capability FCC 47 Part 68, Type A, Metallic Test Metallic Test A. Sustain 2 pulses @ ± 800 Vpk, 100 amps Ipk, 10/560 µsec. with no degradation in performance. A. 10 of 10 fuses passed this test. 10 fuses. Telecom Nano Fuse rating only. 11. Lightning Surge Withstand Capability FCC 47 Part 68, Type A, Longitudinal Test Longitudinal Test: A. Sustain 2 pulses @ ± 1500 Vpk, 200 Ipk, 10/160 µsec. with no degradation in performance. A. 10 of 10 fuses passed this test. 10 fuses. Telecom Nano Fuse rating only. * After successfully passing this test, 10 of the 25 fuses were exposed to additional cycles of the same conditions & allowed to continue until opening. Minimum duration was 216 pulses. 21