Specifications are subject to change without notice.

4B04B-524-RC - Line Protection Network

Matched Pair of Resistors plus Thermal Fuse

Electrical Characteristics

Resistance Values (R1 = R2)...............................................15

Ω - 60Ω

Resistance Tolerance

>34

Ω .........................................................................................±2%

<34

Ω .........................................................................................±5%

TCR ...................................................................................100ppm/°C

Ratio Tolerance

>34

Ω ......................................................................................±0.5%

<34

Ω .........................................................................................±2%

Temperature Range.....................................................-40ºC to +85ºC

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 10x1000µs,

Number of Pulses ..............................25 each resistor each polarity

25 simultaneous each polarity

2500 Volts Peak, 500 Amp Peak Current,

Max. Rise/Min. Decay Time 2x10µs,

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 2x10µs,

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

thermal fuse

BELLCORE GR-1089

protection on telecom line cards

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

1

4

11

R2

14

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

Resistance Code

• First 2 digits are significant

• Third digit represents the number of zeros to follow

Product Dimensions

Electrical Schematic

Break Open Time

DIMENSIONS:

MM

(INCHES)

0.01

0.1

1

10

100

10

100

1000

10000

Power (Watts)

SINGLE RESISTOR

BOTH RESISTORS

SIMULTANEOUS

COPYRIGHT© 2001, BOURNS, INC. LITHO IN U.S.A. IP 7/01 N0XXX

REV. A

Standard Resistance Values

Resistance

Resistance

(ohms)

Code

20

200

40

400

50

500