Features ■ ■ ■ ■ For use in telecommunication circuit applications requiring low current protection with high surge tolerance Overcurrent protection to Telcordia GR-1089-CORE & UL 1950/60950 Bourns® TISP® products are recommended for the overvoltage section of the circuit Agency recognition: File: E198545 Telefuse™ SMD Power Cross Protection Fuse Electrical Characteristics Peak Surge Current (Amps) Peak Surge Current (Amps) 50 Pulses @ 1 KV 10 µs x 1000 µs 10 Pulses @ 1 KV 10 µs x 1000 µs 1.8 25 35 0.25 17 100 N/A 0.40 Model Number Ampere Rating (A) Voltage Rating (Vrms) Typical Cold Resistance (ohms) Volt-drop @ 100 % In (Volts) max. Melting I2T < 10 msec (A2 sec.) Melting I2T @ 10 In (A2 sec.) B0500T 0.500 600 0.350 0.28 1.4 B1250T 1.25 600 0.090 0.18 14 % of Amp Rating Opening Time Minimum Maximum 4 hrs. N/A 3 sec. 60 sec. 100 msec. 1.5 sec. 30 msec. 300 msec. Surge Withstand Ratings (Model B1250T ) Voltage Peak Surge Current Maximum Rise/Duration Time 800 V 100 A 10 µs x 560 µs 1000 V 100 A 10 µs x 1000 µs Thermal Shock ........................................MIL-STD-202, Method 107, Test Condition B (-65 °C to +125 °C) 2500 V 500 A 2 µs x 10 µs Shock................................................MIL-STD-202, Method 213, Test Condition I (100 Gs peak for 6 milliseconds) Vibration.............................................MIL-STD-202, Method 201 (10-55 Hz, 0.06 inch total excursion) Salt Spray .........................................MIL-STD-202, Method 101, Test Condition B (48 hrs.) Insulation Resistance........................MIL-STD-202, Method 302, Test Condition A (after opening) 10,000 ohms minimum Solderability .......................................MIL-STD-202, Method 208 Resistance to Solder Heat................MIL-STD-202, Method 210, Test Condition J (235 °C, 30 sec.) 5000 V 500 A 2 µs x 10 µs 100 % 200 % 500 % 1000 % Temperature Range.................................................-55 ºC to +125 ºC Maximum Power Dissipation (W) Environmental Characteristics Repetitions 4 Pulses (2 each polarity) 100 Pulses (50 each polarity) 40 Pulses (20 each polarity) 4 Pulses (2 each polarity) Power Cross Rating Overload Current 200 % Fuse Rating 2.2 A 7A 40 A 60 A Voltage (VAC) Clearing Time Limit 1.25 A 500 mA 600 V max. 60 sec. max. 60 sec. 600 V 600 V 600 V 600 V max. 15 min. max. 1 sec. max. 50 msec. max. 20 msec. max. 2 min. max. 100 msec. max. 30 msec. max. 20 msec. Physical Characteristics Body Material ..............................Ceramic with tin plated brass caps Solder ..................................................................................Lead-free Packaging .......................................................2,000 pcs. per 13” reel Ordering Information Part Number Current Rating B0500T 500 mA B1250T 1.25 A Reliable Electronic Solutions Asia-Pacific: TEL +886- (0)2 25624117 • FAX +886- (0)2 25624116 Europe: TEL +41-41 7685555 • FAX +41-41 7685510 North America: TEL +1-909 781-5500 • FAX +1-909 781-5700 bourns.com Specifications are subject to change without notice. Telefuse™ SMD Power Cross Protection Fuse Typical Current Withstand vs. Current Duration Product Dimensions 100 2.03 ± .102 (.080 ± .004) 9.65 ± .254 (.38 ± .01) IRMS - RMS Current - A 10 TISP4xxxH3BJ / TISP5xxxH3BJ B1250T 3.05 ± .127 (.120 ± .005) 3.05 ± .127 (.120 ± .005) 1 B0500T Recommended Pad Layout 3.81 (.15) 0.1 0.01 0.1 1 10 100 4.06 (.16) 1000 t - Current Duration - s 5.08 (.20) mm (INCHES) DIMENSIONS: Packaging Specifications 2.2 (.087) 20 (.787) 13.0 DIA. (.512) 1.55 ± 0.05 (.061 ± .002) DIA. 55.0 (2.165) DIA. 21.0 (.827) DIA. 0.40 ± 0.05 (.016 ± .002) 2.0 ± 0.1 (.079 ± .004) 1.75 ± 0.1 (.069 ± .004) 1.6 ± 0.05 (.063 ± .002) DIA. CL 7.50 ± 0.1 (.295 ± .004) 10.0 ± 0.1 (.394 ± .004) R 3 ° REF. 3.50 ± 0.1 (.138 ± .004) 330 (12.992) DIA. 4.0 ± 0.1 (.157 ± .004) 0.3 (.012) TYP. 16.0 ± 0.3 (.630 ± .012) 8.0 ± 0.1 (.315 ± .004) 3.50 ± 0.1 (.138 ± .004) 1.6 (.063) CL “Telefuse” is a trademark of Bourns, Inc. “TISP” is a trademark of Power Innovations, Ltd., a Bourns Company, and is Registered in U.S. Patent and Trademark Office. Specifications are subject to change without notice. 08/02 COPYRIGHT© 2002, BOURNS, INC. LITHO IN U.S.A. 08/02 e/L0204