The SIEMENS 3RH2244-1BB40 is a contactor relay with four normally open and four normally closed contacts, designed for 24 V DC control circuits and convenient screw-terminal wiring. Sized for frame S00 with a captive auxiliary switch, it fits compact installations while keeping auxiliary wiring secure and accessible. Use it to switch multiple control lines simultaneously, organize interlock or signaling functions, and simplify panel assembly with clear terminal access. Its configuration supports reliable contact separation for control logic and safety applications where multiple contact states are needed. Ideal for industrial control panels, machinery, and automation systems requiring organized, multi-contact switching.