A relay is an electrically operated switch that opens and closes circuits by receiving an electrical current. The 12V 30A relay is designed to handle a control voltage of 12 volts, which is common in many automotive and industrial applications, and can support a current of up to 30 amps. This makes it ideal for controlling high-power devices without requiring the use of complex or bulky switching mechanisms.

    The 12V 30A relay operates by using an electromagnet to open or close the relay’s switch. When the control voltage is applied, the electromagnet is energized, creating a magnetic field that either opens or closes the circuit, depending on the design of the relay. This action allows a low-power signal to control high-power devices like motors, lights, and other electrical systems.