• 4222 South Staples Street • Corpus Christi Texas 78411 USA

Wire and Film Technologies Division

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

Physical Data

General Purpose

Carbon Film Resistors

Dimensions (inches and (mm))

Dimension

CF 1/8

CF 1/4

CF 1/2

A

1.10 ± .08 (28.0 ± 2.0)

B

0.13 + .01/-.00 (3.2 + 0.2/-0.0)

0.24 ± .01 (6.0 ± 0.3)

0.33 ± .02 (8.5 ± 0.5)

C

0.018 ± .001 (0.45 ± 0.02)

0.022 ± .001 (0.55 ± 0.03)

0.026 ± .002 (0.65 ± 0.05)

D

0.07 ± .01 (1.8 ± 0.15)

0.09 ± .01 (2.3 ± 0.2)

0.11 ± .01 (2.8 ± 0.3)

Construction

1. COLOR BANDS.

The resistors are permanently color banded for resistance value and tolerance in accordance with EIA specifications.

2. HELIXING.

The units are helixed to a predetermined base to final value ratio to obtain the best TCR, noise and stability characteristics.

3. FILM.

Carbon-film resistors have a homogeneous film of pure carbon deposited by a pyrolitic process at carefully controlled

temperatures.

4. SUBSTRATES.

The substrates are of a proprietary non alkaline ceramic, prepared and processed under exacting conditions to guarantee the

utmost in uniformity and surface characteristics.

5. INSULATION.

The resistors are coated with multiple layers of a baked-on fire-retardant synthetic resin which provides the units with a high

degree of mechanical and electrical protection in the most adverse operating conditions.

6. TERMINATIONS.

Positive contact is provided to the resistance element by precision-made end caps. The lead wires are attached by using

proprietary welding techniques.

B

C

A

A

D

1

2

3

4

5 6

CF Series Issue August 2008 Sheet 2 of 3