Siemens 3RH1140-2BB40 Industrial Three-Phase Contactor

Siemens 3RH1140-2BB40 Sirius Contactor Relay is a compact S00-frame, four-pole device with a 24 V DC control coil designed to switch three-phase loads in industrial equipment. It provides four normally open main contacts, insulation voltage up to 690 V, and a pollution degree 3 rating, with a 6 kV surge voltage resistance and IP20 protection on the front; the coil is DC 24 V and the auxiliary switch option is included in this model. The device is built for durability, delivering about 30,000,000 mechanical operating cycles and a front-mounted auxiliary switch block option, with cage-clamp (CAGE CLAMP) connections for secure wiring and a compact weight around 0.245 kg. It operates reliably from -25 °C to +60 °C and is part of the Sirius 3R family, commonly used to control motors, pumps, and other three-phase loads in industrial control panels.