Siemens 3RH2131-1BB40 is a four-pole Sirius contactor relay (frame size S00) with a 24 V DC coil and screw-terminal wiring, designed for control-panel applications. It provides three normally open (NO) contacts and one normally closed (NC) contact, enabling versatile sequencing and interlock functionality in automation circuits. Rated for switching up to 10 A at up to 690 V AC, this compact 3RH2 family device delivers reliable control of loads while occupying minimal panel space, with a coil power of about 4 W for efficient operation.
