Temperature Range.................................................-55 ºC to +125 ºC
Environmental Characteristics
Thermal Shock ........................................MIL-STD-202, Method 107,
Test Condition B (-65 °C to +125 °C)
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.)
Physical Characteristics
Body Material ..............................Ceramic with tin plated brass caps
Solder ..................................................................................Lead-free
Packaging.......................................................2,000 pcs. per 13” reel
Specifications are subject to change without notice.
Telefuse
™
SMD Power Cross Protection Fuse
Features
a73 For use in telecommunication circuit applications requiring low current protection
with high surge tolerance
a73 Overcurrent protection to Telcordia GR-1089-CORE & UL 1950/60950
a73 Bourns
®
TISP
®
products are recommended for the overvoltage section of the circuit
a73 Agency recognition: File: E198545
Ordering Information
% of Amp Rating
Opening Time
Minimum Maximum
100 % 4 hrs. N/A
200 % 3 sec. 60 sec.
500 % 100 msec. 1.5 sec.
1000 % 30 msec. 300 msec.
Peak Maximum
Voltage Surge Rise/Duration Repetitions
Current Time
800 V 100 A 10 µs x 560 µs
4 Pulses
(2 each polarity)
1000 V 100 A 10 µs x 1000 µs
100 Pulses
(50 each polarity)
2500 V 500 A 2 µs x 10 µs
40 Pulses
(20 each polarity)
5000 V 500 A 2 µs x 10 µs
4 Pulses
(2 each polarity)
Part Number Current Rating
B0500T 500 mA
B1250T 1.25 A
Overload Voltage Clearing Time Limit
Current (VAC) 1.25 A 500 mA
200 %
600 V max. 60 sec. max. 60 sec.
Fuse Rating
2.2 A 600 V max. 15 min. max. 2 min.
7 A 600 V max. 1 sec. max. 100 msec.
40 A 600 V max. 50 msec. max. 30 msec.
60 A 600 V max. 20 msec. max. 20 msec.
Power Cross Rating
Surge Withstand Ratings (Model B1250T )
Peak Surge Peak Surge
Ampere Voltage
Typical Volt-drop
Melting I
2
T Melting I
2
T Current Current
Maximum
Model
Rating Rating
Cold @ 100 % In
< 10 msec @ 10 In (Amps) (Amps)
Power
Number
(A) (Vrms)
Resistance (Volts)
(A
2
sec.) (A
2
sec.) 50 Pulses @ 1 KV 10 Pulses @ 1 KV
Dissipation
(ohms) max.
10 µs x 1000 µs 10 µs x 1000 µs
(W)
B0500T 0.500 600 0.350 0.28 1.4 1.8 25 35 0.25
B1250T 1.25 600 0.090 0.18 14 17 100 N/A 0.40
Electrical Characteristics
Reliable Electronic Solutions
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