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What is a relay and what does it do? In fact, the function of automobile relay is the same as that of general relay.

Electromagnetic relay is a relay that drives the movable part of the magnetic circuit by the electromagnetic attraction generated by the control current passing through the coil.

There are no mechanical parts in SSR, and the structure is completely sealed by pouring.

Solidstate relay (SSR for short) is to package the light-controlled thyristor and light-emitting diode together, and ensure the electrical isolation between them. Just like the coil and contact in relay are isolated from each other, the thyristor circuit can be controlled by turning on and off the light-emitting tube, and its function is the same as that of ordinary electromagnetic relay.

The general circuit is often divided into two parts: the main circuit and the control circuit. The relay is mainly used for the control circuit and the contactor is mainly used for the main circuit.