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Features
I I I I
Matched pair of resistors plus thermal fuse Power line fault/lightning protection to BELLCORE GR-1089 Typical application is secondary protection on telecom line cards UL 497A recognition
I I
Thermal fuse links Bourns TISP(R) products are recommended for the overvoltage section of the protection circuit
4B04B-524-RC - Line Protection Network
Matched Pair of Resistors plus Thermal Fuse
Electrical Characteristics
Resistance Values (R1 = R2)...............................................15 - 60 Resistance Tolerance >34 .........................................................................................2% <34 .........................................................................................5% TCR ...................................................................................100ppm/C Ratio Tolerance >34 ......................................................................................0.5% <34 .........................................................................................2% Temperature Range.....................................................-40C to +85C
Product Dimensions
51.05 MAX. (2.010) 3.05 (.120) MAX.
12.19 (.480) 1 8.89 (.350) 4 17.78 (.700) 11 14 0.36 (.014) MAX.
Physical Characteristics Body Style ..........................................................Open Frame SIP Substrate Material ...................................................96% Alumina Lead Frame Material .................................Copper, solder coated Flammability...............................................Conforms to UL94V-0 Functional Characteristics (per Bellcore GR-1089)
First Level Lightning Surge Resistors will remain within tolerance after testing.
7.62 (.300)
3.43 .381 (.135 .015)
DIMENSIONS:
MM (INCHES)
Electrical Schematic
R1
R2
1000 Volts Peak, 100 Amp Peak Current, Max. Rise/Min. Decay Time 10x1000s, Number of Pulses ..............................25 each resistor each polarity 25 simultaneous each polarity 2500 Volts Peak, 500 Amp Peak Current, Max. Rise/Min. Decay Time 2x10s, Number of Pulses .............................10 simultaneous each polarity First Level AC Power Fault Resistors will remain within tolerance after testing. 50 Vrms, .33 Amp Short Circuit Current, Duration...........................................................................15 minutes 100 Vrms, .17 Amp Short Circuit Current, Duration...........................................................................15 minutes 600 Vrms, 1.0 Amp Short Circuit Current, Duration ........................................................60 One-second pulses
0.01
1
4
11
14
Break Open Time
100
10
TIME (Seconds)
SINGLE RESISTOR 1 BOTH RESISTORS SIMULTANEOUS
0.1
Second Level Lightning Surge Resistor package must fail safely causing no fire, electrical, or framentation hazard. 5000 Volts Peak, 500 Amp Peak Current, Max. Rise/Min. Decay Time 2x10s, Number of Pulses ...............................1 simultaneous each polarity Second Level AC Power Fault Resistor package must fail safely causing no fire, electrical, or framentation hazard.
10
100
1000
10000
Power (Watts)
How To Order
4B 04 B - 524 - RC
Model (4B = Open Frame) Number of Pins Physical Configuration Electrical Configuration * 524 = Matched Pair of Resistors plus Thermal Fuse
Standard Resistance Values Resistance (ohms) 20 40 50
Specifications are subject to change without notice.
Resistance Code 200 400 500
Resistance Code * First 2 digits are significant * Third digit represents the number of zeros to follow
REV. A
COPYRIGHT(c) 2001, BOURNS, INC. LITHO IN U.S.A. IP 7/01 N0XXX

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