A power relay is an essential electrical component used in a wide range of applications, from industrial machinery to household appliances. Its primary function is to control high-power circuits by switching electrical loads on and off through low-power control signals. This makes power relays an indispensable tool in automation, control systems, and safety mechanisms.

What is a Power Relay? A power relay is an electromechanical switch that allows one circuit to control another. It works by using an electromagnet to open or close a set of contacts, which can either complete or interrupt the flow of electrical current. When an electric current passes through the relay’s coil, it generates a magnetic field that pulls a movable armature, thus opening or closing contacts. This simple yet effective mechanism enables relays to control devices such as motors, lights, and heaters, which require a larger electrical current than what can be safely handled by a typical controller.