fm1-2-4k7ji IRC - a TT electronics Company., fm1-2-4k7ji Datasheet

fm1-2-4k7ji

Manufacturer Part Number

fm1-2-4k7ji

Description

Fusible Metal Film Resistors

Manufacturer

IRC - a TT electronics Company.

Datasheet

1.FM1-2-4K7JI.pdf (3 pages)

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164

Construction

The metal film is deposited on a high purity ceramic rod. End

caps are force fitted and termination wires welded to the

caps. The resistive film is adjusted to the required value by a

special helical cut; finally the cement protection is applied to

the resistor body and marked with indelible ink.

Terminations

Material

Strength

Solderability The terminations meet the requirements of

Fusible Metal Film

Resistors

FM Series

•

Electrical Data

Physical Data

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own data and is considered accurate at time of going to print.

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

Power rating at 70° C

Resistance range

Limiting element voltage

TCR

Resistance tolerance

Standard values

Thermal impedance

Ambient temperature range

Dimensions (mm) & Weight (g)

Type

FM1

Predictable fusing characteristics

Flameproof protection

L max

12.5

6.2

9.0

Solder-coated copper wire.

The terminations meet the requirements of

IEC 68.2.21.

IEC 115-1, Clause 4.17.3.2.

D max

2.3

2.5

3.4

4.2

f min

21.0

19.6

17.8

· Bedlington, Northumberland NE22 7AA, UK

d nom

0.6

0.8

mounting

centres

10.2

12.7

18.4

PCB

radius

ppm/° C

° C/watt

bend

Min.

0.6

1.2

ohms

watt

volts

° C

Wt. nom

Marking

Resistors are colour coded with five bands. Four of the bands

are used to indicate value and tolerance, with IEC 62 colours

being used. A fifth yellow band denotes constant voltage

fusibility.

Solvent Resistance

The body protection and marking are resistant to all normal

industrial cleaning solvents suitable for printed circuits.

Flammability

The resistors will not burn or emit incandescent particles

under any condition of applied temperature or power

overload.

0.3

0.6

0.9

0R1 - 10K

0.25

250

150

E24 preferred

-55 to 155

0R1 - 27K

120

Welwyn Components

350

250

0.5

0R2 - 1K5

TT electronics plc

FM1

350

100

1.0

A subsidiary of

Issue B · 03.02

02 . 07

Related parts for fm1-2-4k7ji

fm1-2-4k7ji Summary of contents

Page 1

... The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Flammability The resistors will not burn or emit incandescent particles under any condition of applied temperature or power overload. Welwyn Components FM1 2 0.5 1.0 0R1 - 27K 0R2 - 1K5 350 350 250 5 ...

Page 2

... C Temperature rapid change Resistance to solder heat FM1 Fuse Times Initial Power (W) 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 ...

Page 3

... Packing FM¼ 5000/box I Ammo FM½ 2500/box FM1 1500/box © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com – Standard Welwyn Components Issue B · ...

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