At its core, a relay is an electrically operated switch that allows the control of one electrical circuit by another low-power signal. The 220V 30A relay specifically is designed to handle 220V AC (alternating current) voltage and up to 30 amperes of current. This makes it ideal for controlling high-power devices such as motors, air conditioners, or lighting systems, with the ability to use a low-power control signal to activate or deactivate the connected circuit.

    Relays work by using an electromagnet to open or close contacts in the switch. When current flows through the coil of the relay, it creates a magnetic field, which moves a mechanical arm (called an armature) to either connect or disconnect the contacts, thus opening or closing the circuit.