Specifications are subject to change without notice.

Customers should verify device performance in their specific applications.

REV. A 06/05

Product Characteristics

Resistor Tolerance

20 ohms to 100 ohms .....................................................±1 %

5.6 ohms .........................................................................±5 %

Ratio Tolerance

20 ohms to 100 ohms ..................................................±0.5 %

5.6 ohms ......................................................................±2.5 %

Operating Temperature.......................................-40 °C to +85 °C

Environmental Characteristics

TESTS PER MIL-STD-202

Humidity ..........................................................................103B

Solderability.....................................................................208D

Thermal Shock ................................................................107B

Resistance to Solvents ......................................................215

Resistance to Solder Heat ..............................................210D

Flammability ...................................................................UL 94V-0

IEC 695-2-2

Functional Characteristics

ITU-T K.20

Lightning Surge ................................................................1 KV

Power Induction........................................................600 Vrms

Power Contact..........................................................230 Vrms

UL 497A

Physical Characteristics

Body Style ..........................................................Open Frame SIP

Body Material...........................................................96% Alumina

Lead Frame Material..................................Copper, solder coated

Standard Parts Available Off the Shelf

........................................................5.6, 20, 30, 50, 100 ohms

How To Order

L21 A100AA

Model

(L21 = LFR w/Thermal Fuse)

Resistor Tolerance

• A5R6AA = 5.6 ohms

• A020AA = 20 ohms

• A030AA = 30 ohms

• A050AA = 50 ohms

• A100AA = 100 ohms

Custom values available; contact factory.

Features

■

Thick film technology

■

Bourns patented thermal fuse

■

Fail safe

■

Protection to ITU-T K.20

Applications

■

Analog Line Cards

■

CPE (Customer Premises Equipment)

■

DDS (Digital Data Systems)

■

DLC (Digital Loop Carriers)

■

T1/T3 Transmission Lines

■

ISDN

R1

1

4

2

R2

6

9

8

F1

F2

25.75

(1.010)

MAX.

TYP.

2 PLCS.

2.54

(.100)

2.54

(.100)

TYP.

3 PLCS.

5.08

(.200)

MAX. SEATED

HEIGHT

12.32

(0.485)

THICK

0.51 ±0.25

(.020 x .010)

DIA. HOLE

0.81

(.032)

3.175 + 0.64/-0.13

(.125 + .025/-.005)

REF.

0.84

(.033)

MAX. THICKNESS

3.18

(.125)

Circuit Schematic

Product Dimensions

Circuit Protection Division

Asia-Pacific:

Tel: +886-2 2562-4117

Fax: +886-2 2562-4116

Europe:

Tel: +41-41 768 5555

Fax: +41-41 768 5510

The Americas:

Tel: +1-951 781-5500

Fax: +1-951 781-5700

www.bourns.com

DIMENSIONS:

MM

(INCHES)