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Through-hole carbon film resistor · YAGEO CFR-25

Resistor (1/4 W carbon film) Internal Circuitry

Explore the internal circuitry and functional stages of Resistor (1/4 W carbon film).

Inside Resistor (1/4 W carbon film)

Ceramic core, carbon film, helical trim, end caps and leads.

Cutaway of a carbon film resistor: a ceramic rod coated with carbon film, a helical groove that sets the value, metal end caps with leads, and a lacquer coat with colour bands.
Functional cutaway; proportions simplified.

Explore the circuit

Select a stage to see its role and connections

Carbon film

A thin carbon layer on a ceramic rod is the resistive element.

Helical trim

A spiral groove cut into the film lengthens the current path until the value is reached.

Caps and lacquer

Pressed end caps join the leads; the lacquer coat insulates and carries the colour bands.

Component view