Siemens 3RH2244-1BB40 SIRIUS 3RH2 Auxiliary Contactor Relay 24 V DC

The Siemens 3RH2244-1BB40 is a SIRIUS 3RH2 auxiliary contactor relay engineered to expand switching and control logic in industrial automation and control panel systems. Featuring four normally open (4 NO) instantaneous contacts and a 24 V DC coil, this auxiliary contactor relay is ideal for signalling, interlocking, and auxiliary control functions where multiple contact closures are required. The unit mounts easily on DIN-rail systems and uses secure screw-type electrical terminals for reliable conductor connections. Designed for compatibility with the SIRIUS 3RH2 contactor family, the 3RH2244-1BB40 delivers dependable performance in machinery controls, motor starters, and automated assemblies requiring robust auxiliary switching. Compliance with IEC/EN standards ensures long-term operational integrity and installation safety.