Siemens 3RH1131-1BB40 Contactor

Siemens Sirius 3RH1131-1BB40 Contactor Relay is a four-pole device with a 24 V DC coil, delivering three normally open contacts and one normally closed contact for reliable control of industrial loads in automation panels. This S00‑size unit uses screw terminals for straightforward wiring and is rated for an insulation voltage of 690 V with a front IP20 protection rating and a pollution degree of 3, making it suitable for indoor panel mounting. It accommodates ambient operating temperatures from -25 to +60°C (transport/storage -55 to +80°C) and elevations up to 2,000 m, with shock resistance of 10 g/5 ms and 5 g/10 ms and surge voltage resistance of 6 kV. The contact rating is 6 A, and the mechanical service life is typically 30,000,000 switching cycles; when paired with electronics-compatible auxiliary switch blocks, the typical life is about 5,000,000 cycles. Typical applications include controlling motors, pumps, fans, and conveyors in automation systems, where the 3NO+1NC arrangement provides both a main load path and a signaling or interlock contact in a compact S00 package.