Introducing Schneider Electrics compact RXM miniature relays with LED. They are often used to increase the functions in electrical enclosures, predominantly for industrial applications (machine/building equipment and HVAC). These relays can be referred to as an electromechanical relay or an industrial switch.
A relay is an electrical switch that is operated by electrical pulses, their primary function is to open and close a circuit. When power passes through a circuit, a relay switches position (usually from NC to NO) using an internal coil which generates a magnetic force. This force then holds the relay in a NO position, when the current is switched off the relay returns to the NC position. This function is what makes these non-latching relays perfect for push-button applications such as keyboards and micro-controller input buttons.