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
■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
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 I2T Melting I2T Current Current Maximum
Model Rating Rating Cold @ 100 % In < 10 msec @ 10 In (Amps) (Amps) Power
Number (A) (Vrms) Resistance (Volts) (A2sec.) (A2sec.) 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
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” 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.
Typical Current Withstand vs. Current Duration
Packaging Specifications
Telefuse™SMD Power Cross Protection Fuse
100
10
1
0.1
0.01 0.1 1 10 100 1000
t - Current Duration - s
- RMS Current - AIRMS
B1250T
B0500T
TISP4xxxH3BJ /
TISP5xxxH3BJ
3.05 ± .127
(.120 ± .005)
3.05 ± .127
(.120 ± .005)
2.03 ± .102
(.080 ± .004)
9.65 ± .254
(.38 ± .01)
3.81
(.15)
4.06
(.16)
5.08
(.20)
Product Dimensions
Recommended Pad Layout
DIMENSIONS: mm
(INCHES)
COPYRIGHT© 2002, BOURNS, INC. LITHO IN U.S.A. 08/02 e/L0204
08/02
330
(12.992)
2.0 ± 0.1
(.079 ± .004)
0.40 ± 0.05
(.016 ± .002)
1.55 ± 0.05
(.061 ± .002)
DIA.
1.6 ± 0.05
(.063 ± .002)
DIA.
0.3
(.012)
TYP.
R
1.6
(.063)
20
(.787)
2.2
(.087)
13.0
(.512) DIA.
55.0
(2.165)
DIA.
DIA.
21.0
(.827)
DIA.
1.75 ± 0.1
(.069 ± .004)
7.50 ± 0.1
(.295 ± .004)
16.0 ± 0.3
(.630 ± .012)
10.0 ± 0.1
(.394 ± .004)
3 ° REF.
4.0 ± 0.1
(.157 ± .004)
8.0 ± 0.1
(.315 ± .004)
3.50 ± 0.1
(.138 ± .004)
3.50 ± 0.1
(.138 ± .004)
C
L
C
L
