3RH2131-2BB40

The 3RH2131-2BB40 is a 4-pole SIRIUS 3RH2 series control relay (contactor relay) from Siemens, engineered for reliable control signal switching, interlocking, and auxiliary circuit regulation in industrial automation panels. Designed for 4-pole control circuits operating up to 690 with a 24V DC operating coil, this compact switching device acts as a core logic element for PLC outputs, safety circuits, and motor starter control loops. Electrically, the 3RH2131-2BB40 features a 3NO + 1NC (3 Normally Open / 1 Normally Closed) contact configuration rated for heavy-duty pilot duty control applications (10). Driven by an energy-efficient 24V DC coil, it delivers fast, chatter-free contact actuation with low power consumption. Built with high-reliability silver-alloy contacts, it provides reliable switching across low-current signal lines and standard AC/DC control loads, ensuring positive interlocking and status signals to automation systems. Mechanically, the 3RH2131-2BB40 is housed in a compact Size S00 enclosure designed for snap-on mounting to standard 35mm DIN-rails or direct screw panel installation. Equipped with vibration-resistant Spring-Type (cage clamp) terminals, it accelerates panel wiring time while ensuring maintenance-free, gas-tight wire connections under severe operational vibration inside motor control centers and OEM machinery. Purchase the 3RH2131-2BB40 at Electrical.com, your reliable partner for industrial and commercial electrical products. Our selection includes trusted control relays, magnetic contactors, and automation accessories from top manufacturers like Siemens, Eaton, Cutler-Hammer, and Schneider Electric, backed by a knowledgeable sales team ready to assist with technical questions, product selection, and support.