Features
■ Bourns TISP® products are recommended
for the overvoltage section of the
protection circuit
■ RoHS compliant* versions available
■ Matched pair of resistors
■ Power line fault/lightning protection to
BELLCORE GR-1089
■ Typical application is secondary
protection on telecom line cards
4B04B-523-RC - Line Protection Module
Matched Pair of Resistors
Electrical Characteristics
Product Dimensions
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
51.05
(2.010)
MAX.
1.52
(.060)
MAX.
12.19
(.480)
1
4
11
14
0.36
(.014)
MAX.
8.89
(.350)
17.78
(.700)
3.43 ± .381
Physical Characteristics
(.135 ± .015)
7.62
(.300)
Body Style ................................................................Open Frame SIP
Substrate Material ........................................................96 ꢀ Alumina
Lead Frame Material........................................Copper, solder coated
Flammability.....................................................Conforms to UL94V-0
MM
(INCHES)
DIMENSIONS:
Functional Characteristics (per Bellcore GR-1089)
First Level Lightning Surge -
Resistors will remain within tolerance after testing.
Electrical Schematic
1000 Volts Peak, 100 Amp Peak Current,
Max. Rise/Min. Decay Time 10x1000 µs,
R1
R2
Number of Pulses..............................25 each resistor each polarity
25 simultaneous each polarity
1
4
11
14
2500 Volts Peak, 500 Amp Peak Current,
Max. Rise/Min. Decay Time 2x10 µs,
Number of Pulses .............................10 simultaneous each polarity
Break Open Time
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
How To Order
4B 04 B - 523 - RC LF
Second Level AC Power Fault -
Resistor package must fail safely causing no fire,
electrical, or framentation hazard.
Model
(4B = Open Frame)
Number of Pins
Standard Resistance Values
Physical Configuration
Electrical Configuration
Resistance
(ohms)
Resistance
Code
• 523 = Matched Pair of Resistors
Resistance Code
• First 2 digits are significant
20
40
50
200
400
500
• Third digit represents the number of zeros to follow
RoHS Compliant Option
Blank = Standard Product
LF =RoHS Compliant Product
*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.
REV. 06/11