Fusible Carbon

Film Resistors

FC4

FC4

Power rating at 70°C

watts

0.33

Resistance range

ohms

1R0-5K1

TCR

ppm/°C

300

Resistance tolerance

%

5, 10

Standard values

E24 preferred

Thermal impedance

°C/watt

215

Ambient temperature range

°C

-55 to 125

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

Electrical Data

Issue B · 03.02

A subsidiary of

TT electronics plc

Welwyn Components

166

Construction

The carbon film is deposited on a high purity ceramic rod.

End caps are fitted and termination wires welded to the caps.

The resistive film is adjusted to the required value by a special

helical cut; finally the flame retardant lacquer protection is

applied to the resistor body and marked with an indelible ink.

Terminations

Material

Solder-coated copper wire.

Strength

The terminations meet the requirements of

IEC 68.2.21

Solderability

The terminations meet the requirements of

IEC 115-1, Clause 4.17.3.2

Marking

Resistance value and tolerances are identified in accordance

with IEC62.4 - band colour code. A fifth (yellow) band

denotes that the product is fusible and suitable for use in

constant voltage applications.

Solvent Resistance

The body protection and marking are resistant to all normal

industrial cleaning solvents suitable for printed circuits.

Flammability

The resistor coating will not burn or emit incandescent

particles under any condition of applied temperature or

power overload.

Dimensions (mm) & Weight (g)

PCB

Min.

mounting

bend

Type

L Max

D Max

f min

d nom

centres

radius

Wt.nom

FC4

6.2

2.5

21.0

0.6

10.2

0.6

0.3

Physical Data

L

D

f

d