Siemens 3RH1244-2BB40 Contactor Relay 4NO/4NC

SiemenS 3RH1244-2BB40 is a Sirius 3RH2-series contactor relay in the compact S00 frame that provides four normally open and four normally closed main contacts (4NO/4NC) for multi-circuit control in a single device. This unit ships with a permanently jointed auxiliary switch block already attached, expanding signaling and interlock capabilities without requiring additional mounting, and it is designed for reliable operation in demanding industrial environments. With its compact S00 footprint, the 3RH1244-2BB40 is ideal for panel‑level motor control, process automation, conveyors, and packaging lines where both NO and NC signaling paths are needed alongside auxiliary feedback. The combination of the four NO and four NC circuits and the integrated auxiliary block supports flexible control logic and interlocking schemes, enabling more compact control architectures and streamlined wiring within Siemens’ Sirius ecosystem. This makes it well suited for applications that require tight space utilization, modular expansion, and consistent performance across machines and lines in manufacturing and infrastructure environments.