PLA Relay

A plug-in relay is an electromechanical switching device designed to be easily inserted into and removed from a relay socket or base without soldering. It uses an electromagnetic coil to open or close contacts, enabling control of circuits in response to an input signal. Plug-in relays are widely used in control panels, automation systems, protection circuits, and industrial machinery for functions such as switching loads, isolating circuits, and interfacing logic/control devices. Common specifications include coil voltage (e.g., 12 VDC, 24 VDC, 230 VAC), contact configuration (e.g., SPDT, DPDT), contact current rating (e.g., 5 A–30 A), and mounting/socket type for easy installation and replacement.