The contactor is an electrically operated control key used for switching a power or control circuit.
The contactor is very similar to the relay, with the difference that the contactor is used for high ampere applications.
An orbital controller is controlled that has a much lower power level than the circuit board. Unlike a circuit breaker, a contactor is not used to cut off a short circuit. The contactors are available in a variety of sizes and sizes. A small contactor with a 24V DC voltage that can be easily inserted in one hand and capable of cutting off only 1 amp, to a contactor with a width of 1 m (yard) at several kV voltages and a few thousand amperes.
Contactors are used to control various electrical loads, including electromotors, capacitor banks, lighting circuits, electric heaters and other electrical equipment.