*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

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 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