Siemens 3RH2911-1GA40 Front Mounted Auxiliary Switch

Siemens 3RH2911-1GA40 is a front-mounted auxiliary switch that attaches to compatible contactors to provide four normally open contacts. Each NO contact is wired through terminals 53/54, 63/64, 73/74, and 83/84, with a separate current path of 1 NO per contact, and the module is physically coded to fit only with contactor relays 3RH2140 and 3RH2440 under EN 50011. The accessory uses Size S00 screw terminals and offers insulation voltage up to 690 V (pollution degree 3) and a surge withstand of 6 kV. It achieves a mechanical life of about 10,000,000 cycles and an electrical endurance of about 200,000 cycles at AC-15 on 230 V.