*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
4B04B-524-RC - Line Protection Module
Matched Pair of Resistors plus Thermal Fuse
Electrical Characteristics
Resistance Values (R1 = R2) .................................15 ohms- 60 ohms
Resistance Tolerance
>34Ω........................................................................................±2 %
<34Ω........................................................................................±5 %
TCR ..................................................................................100 ppm/°C
Ratio Tolerance
>34Ω.....................................................................................±0.5 %
<34Ω........................................................................................±2 %
Temperature Range...................................................-40 ºC to +85 ºC
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.
1000 Volts Peak, 100 Amp Peak Current,
Max. Rise/Min. Decay Time 10x1000 µs,
Number of Pulses ..............................25 each resistor each polarity
25 simultaneous each polarity
2500 Volts Peak, 500 Amp Peak Current,
Max. Rise/Min. Decay Time 2x10 µs,
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
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 2x10 µs,
Number of Pulses ...............................1 simultaneous each polarity
Second Level AC Power Fault -
Resistor package must fail safely causing no fire,
electrical, or framentation hazard.
Features
■RoHS compliant* versions available
■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
■Thermal fuse links
■Bourns TISP®products are recommended
for the overvoltage section of the
protection circuit
1 4 11 14
8.89
(.350) 7.62
(.300)
17.78
(.700)
51.05
(2.010) MAX. 3.05
(.120)
MAX.
0.36
(.014)
MAX.
12.19
(.480)
3.43 ± .381
(.135 ± .015)
R1
14 11
R2
14
How To Order
4B 04 B - 524 - RC LF
Model
(4B = Open Frame)
Number of Pins
Physical Configuration
Electrical Configuration
• 524 = Matched Pair of Resistors plus Thermal Fuse
Resistance Code
• First 2 digits are significant
• Third digit represents the number of zeros to follow
RoHS Compliant Option
Blank = Standard Product
LF = RoHS Compliant Product
Product Dimensions
Electrical Schematic
Break Open Time
DIMENSIONS: MM
(INCHES)
REV. 06/11
Standard Resistance Values
Resistance Resistance
(ohms) Code
20 200
40 400
50 500
*RoHS COMPLIANT
VERSIONS
AVAILABLE
