Features

■

UL Listed

Applications

FWxxA Series Fusible Power Resistors

*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.

Specifications are subject to change without notice.

The device characteristics and parameters in this data sheet can and do vary in different applications and actual device

performance may vary over time.

Users should verify actual device performance in their specific applications.

DIMENSIONS:

MM

(INCHES)

Electrical Characteristics

Characteristic

FW Series

Power

1, 2, 3, 5, 7** W

Resistance Range

4.7 ohms to 100 ohms (E24 values)

UL Listed Resistance Range

4.7 ohms to 47 ohms

Tolerance

5 %

Temperature Coefficient

±200 PPM/°C

Operating Temperature Range

-55 °C to +155 °C

Maximum Voltage

√P*R

Fusing Point

See Fusing Performance Chart

Fusing Time

See Fusing Performance Chart

Product Dimensions

General Introduction

The FWxxA Series of axial leaded wirewound resistors is designed to fuse under abnormal conditions such as sudden surges in

voltage or circuit malfunctions. The resistor will fuse upon application of 120 or 240 voltages.

The resistor will fuse safely if 120 or 240 V is applied. The time to fuse depends on the

resistance value.

** 7 W = 240 Vac only.

Materials

Resistor ............... Wire wound around a

ceramic core

Lead Wire ........................Tinned copper

Housing .......................... Insulated resin

Agency Listing

Description

UL

File Number: E349323

HL

D

d

(DIA.)

H

Model

Dimensions

D

(Max.)

L

(Max.)

Hd

FW10A (1 W)

5.5

(.217)

12

(.472)

28 ± 3.0

(1.102 ± .118)

0.55 ± 0.05

(.022 ± .002)

FW20A (2 W)

6.0

(.236)

12

(.472)

28 ± 3.0

(1.102 ± .118)

0.65 ± 0.05

(.026 ± .002)

FW30A (3 W)

6.5

(.256)

16

(.630)

28 ± 3.0

(1.102 ± .118)

0.75 ± 0.05

(.030 ± .002)

FW50A (5 W)

7.5

(.295)

18

(.709)

28 ± 3.0

(1.102 ± .118)

0.75 ± 0.05

(.030 ± .002)

FW70A (7 W)

9.5

(.374)

26

(1.024)

38 ± 3.0

(1.496 ± .118)

0.75 ± 0.05

(.030 ± .002)

How to Order

FW 10 A 7R50 J A

Model

FW = Fusible

Wirewound

Rated Power

10 = 1.0 Watts

20 = 2.0 Watts

30 = 3.0 Watts

50 = 5.0 Watts

70 = 7.0 Watts

Pin Style

A = Axial

Resistance Code

• R<100 ohms:

“R” represents decimal point

(examples: 7R50 = 7.5 ohms)

• R

≥100 ohms:

First three digits are significant,

fourth digit represents number of

zeros to follow

(example: 1000 = 100 ohms)

Resistance Tolerance

J = ±5 %

Packaging

A = Ammo Pack

• 1,000 pcs./box: FW10, FW20, FW30

• 500 pcs./box: FW50, FW70

Resistance Value

(Ohms)

Resistance

Code

4.7

4R70

5.1

5R10

5.6

5R60

6.2

6R20

6.8

6R80

7.5

7R50

8.2

8R20

9.1

9R10

10

10R0

Popular Values