A switch relay is essentially an electrically operated switch. It consists of a coil, an armature, and a set of contacts. When an electric current flows through the coil, it generates a magnetic field that pulls the armature, causing the contacts to either open or close, depending on the relay’s design. This action allows a low-power electrical signal to control a higher-power circuit, making relays useful in various applications where direct switching might be impractical or unsafe.

    Switch relays are widely used in home appliances, industrial machines, automotive systems, and telecommunications. Their ability to manage high-current circuits with low-power control signals is what makes them so valuable in countless applications.