Siemens 3RH1911-1GA04 Auxiliary Switch Block adds four normally closed (NC) auxiliary contacts to a Siemens Sirius 3RH1 contactor. This 4-pole block uses 44E screw-terminal connections and conforms to DIN EN 50011, providing four NC contacts and no NO contacts. It supports insulation voltage up to 690 V and surge resistance of 6 kV, with an operating current of 10 A for AC-12 at 24 V and at 230 V, making it suitable for signaling and control feedback in motor-control circuits; life ratings include about 10 million mechanical cycles and roughly 200,000 electrical cycles at AC-15 (230 V).
