Relay technology refers to the use of electromechanical devices (relays) to control circuits by opening and closing the circuit through the actuation of electrical signals. Essentially, a relay is a switch that opens and closes under the control of an electrical current, making it indispensable in a wide variety of industries. When a low-voltage current flows through a relay’s coil, it generates a magnetic field, which then actuates a mechanical switch, either opening or closing the circuit to allow or stop the flow of electricity.

    The typical relay is composed of several key components： the coil (electromagnet), contacts, and a spring mechanism. Depending on the design, relays can either be mechanical or solid-state.