Installation manual

Table Of Contents

PTCs

Positive Temperature Coefficient (PTC) thermistors are resistors with a high positive temperature

coefficient of resistance. The PTC is used as a self-resetting fuse in overload applications. When an

overload current flows through a PTC, there is a specific time period before the PTC heats up to its

high-resistance state and starts limiting the current. PTCs are not field replaceable because they are

soldered in place.

Last updated: December 2, 1996

Comments and Suggestions

II: Power - Fuses

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