Carbon Ceramic

Resistors

CCR Series

carbon composition

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.

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Issue C · 03.06

A subsidiary of

TT electronics plc

Welwyn Components

Dimensions (mm)

Type

L max

D max

D norm

F min

CCR 1

15.5

5.5

0.8

30

CCR series resistors are produced from a carbon ceramic

composite material, the composition of which is varied to

produce the required resistance value. The ceramic rods are

fitted with end caps to which are welded the termination

wires. Finally, a specially formulated high voltage epoxy

coating is applied and the resistors are marked.

The body protection and marking are resistant to all normal

industrial cleaning solvents suitable for printed circuits.

Electrical Data

* Tolerance applies to date of manufacture. As in all carbon composition parts value drift in storage is possible. This is typically 3%

in one year and 5% in 2 years.

Physical Data

Construction

Solvent Resistance

CCR series resistors are colour coded. Resistors with 20%

tolerance have three bands indicating value, and resistors with

5% and 10% tolerance have four bands indicating value and

tolerance in accordance with IEC62.

Marking

L

D

f

d

CCR 1

Power rating at 25°C

watts

1

Resistance range

ohms

220R – 22K

Maximum pulse voltage

volts

See pulse graphs

TCR

ppm/°C

<1K0 : -700±200

≥1K0 : -1000±300

Resistance Tolerance

%

10 or 20 *

Standard Values

E12

Ambient temperature range

°C

-40 to 80

Thermal Impedance

°C/W

100