Fusible Metal Film

Resistors

FM Series

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Issue B · 03.02

Welwyn Components

165

Maximum

Load: 1000 hours at 70˚C

3

%

R

Shelf life: 12 months at room temperature

2

%

R

C

˚

5

5

1

t

a

o

r

e

z

C

˚

0

7

t

a

r

e

w

o

p

d

e

t

a

r

m

o

r

f

g

n

i

t

a

r

e

D

Temperature rapid change

5

.

0

%

R

Resistance to solder heat

5

.

0

%

R

Performance Data

52

6

6

5

1.4 mm

Fusing

After fusing the final resistance value will be 50 times the

initial value.

Packaging

All resistors are supplied tape packed ready for loading on

to automatic sequencing and insertion machines.

The standard taping method and critical dimensions are

shown in figure 1. Component wire will not protrude

beyond the outside edge of the tapes.

Lead Formed resistors can also be supplied. Standard

options of Lancet, Radial and Goalpost forming are shown

in Lead Form Information section.

A detailed Packaging Data Sheet is available on request.

Figure 1

Type

FM1

Large ammo pack

5000

2500

1500

Standard Quantities Per Package

FM1 Fuse Times

Initial Power (W)

Initial Power (W)

Initial Power (W)

Issue C · 01.07