Carbon-Composition Resistor

Carbon Composition Resistor

A carbon-composition resistor is a resistor that is made of finely divided carbon or graphite mixed with a powdered insulating material as a binder in the proportions need for the desired R value.

More carbon produces less resistance, while more binder equals greater resistance.

The resistor element is enclosed in a plastic case for insulation and mechanical strength. Joined to the two ends of the carbon resistance element are metal caps with leads of tinned copper wire for soldering the connections into a circuit. carbon-composition resistors normally have a brown body and are cylindrical.

Carbon-composition resistors are commonly available in resistance values of 1Ω to 20MΩ. The power rating is generally 0.1, 0.125, 0.25, 0.5, 1, or 2W.

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