Siemens 3RH1131-1BB40 Contactor

Siemens 3RH1131-1BB40 Contactor Relay is a four-pole Sirius device (3 normally open, 1 normally closed) in the compact S00 size with a 24 V DC coil and screw-terminal connections. It is designed for control-panel applications, offering a rated current of 6 A, 690 V insulation voltage, and front IP20 protection. The unit includes an auxiliary contact option and is suitable for wiring via screw terminals, delivering reliable switching for loads such as small motors and valves in automation circuits. Key environmental and durability specs include ambient operating temperature of -25 to +60 °C, installation altitude up to 2,000 m, shock resistance at 10 g (5 ms) and 5 g (10 ms), and a mechanical life rated up to 30,000,000 switching cycles. The 3NO+1NC configuration, combined with a 24 V DC coil and compact S00 footprint, makes the 3RH1131-1BB40 a versatile choice for compact control logic and interlocking tasks in industrial automation.