The Siemens Sirius 3RH2131-2BB40 Contactor Relay is a compact four-contact auxiliary contactor in frame size S00 with a 24 V DC coil. It provides three normally open and one normally closed auxiliary contacts, and uses spring-loaded terminals for secure, vibration-resistant connections. The device supports insulation voltage up to 690 V AC (pollution degree 3) and has a coil power loss of about 4 W at rated current. This 3RH2-series contactor is designed for PLC outputs and control circuits in automation panels, and its small S00 form factor makes it easy to mount alongside other Siemens SIRIUS components.
