Relays are electrically operated switches used to open and close circuits by receiving electrical signals from outside sources. Today’s solid-state relays use electronic components to control the circuit without physical contact. Specifically, relays control high-voltage circuits with the help of low-voltage signals and high-current circuits with the help of low-current signals.
The parts are commonly used in control panels, manufacturing, and building automation. Symmetry offers RoHS-compliant, PCB mount, solid-state relays from Semtech, a leading manufacturer.