What distinguishes Form C contacts from Form A contacts?

Form C contacts are defined by their configuration, which includes both normally open (NO) and normally closed (NC) contacts. This dual functionality allows Form C contacts to be versatile in different circuit applications, allowing for various configurations depending on the requirements of the device being used. This means that during operation, the Form C contact can connect to one of the two states — either completing the circuit (normally closed) or being open (normally open) based on the input signal or mechanical action.

In contrast, other forms, such as Form A and Form B, have more limited configurations with either only normally open or normally closed contacts. This characteristic of Form C contacts makes them particularly useful in applications requiring a single control point to manage two different types of circuits, thus providing greater flexibility in designs such as relay contacts and control circuits.

This versatility enhances the reliability and adaptability of control systems, supporting a wide range of functionalities within electrical and automation systems.