Signal RelaysA relay is an electrically operated switch that is used to control the flow of electricity in a circuit. A signal relay is a type of relay that is used to amplify or switch electronic signals. Signal relays are commonly used in electronic circuits to isolate one circuit from another, to switch between different circuits, or to control the flow of a signal based on the level or state of another signal. Signal relays are available in a wide range of sizes, shapes, and configurations, and they can be used in a variety of applications, including telecommunications, automotive systems, and industrial automation.