A switch relay is an electrically operated switch that uses an electromagnet to control the opening and closing of a circuit. When a current flows through the coil of the relay, it generates a magnetic field that attracts a movable armature, causing the relay’s contacts to either open or close. This allows a low-voltage control signal to manage the operation of high-voltage circuits, making relays essential for protecting sensitive electronic devices and for automating tasks that would otherwise require manual operation.

    Switch relays can be found in a wide range of devices, including automotive systems, home automation systems, industrial control panels, and telecommunications equipment. They come in different types and configurations depending on the specific needs of the application. These include single-pole single-throw (SPST), double-pole double-throw (DPDT), and solid-state relays, each with its own distinct set of characteristics.