The 3RH2911-1FA40 auxiliary switch is designed for use with contactors in the 3RT2 series and contactor relays in the 3RH2 series. It offers 4 normally open (NO) contacts, with each path rated for 0.3/0.4 amps, ideal for providing additional control and signaling functions. The switch is mounted on the front and features screw terminals for secure connections.