Auxiliary contactor for SIRIUS S00 contactors
The Siemens 3RH1131-2BE40 is a SIRIUS auxiliary contactor in size S00, designed for snap-on or screw mounting alongside the main contactor on a DIN rail. It carries a 60 V DC coil drawing 3.2 W closing and holding power, with 3 normally open and 1 normally closed instantaneous contacts. Front IP20 protection keeps panel builders safe during commissioning.
Contact ratings and switching reliability
Rated operational current varies by voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V (–). Contact reliability is specified at one incorrect switching operation per 100 million operations at 17 V, 1 mA, which matters for PLC-level signal circuits where dry switching can cause oxide buildup. Mechanical endurance is rated at 30 million operations typical.
DIN-rail integration and wiring
The 3RH1131-2BE40 mounts via screw or snap-on fastening on a DIN rail, occupying 45 mm width and 73 mm depth. Terminal wiring accepts 2x (0.25... 2.5 mm²) solid or 2x (24... 14) AWG stranded. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving flexibility in tight enclosures. Shock resistance is 10g / 5 ms and 5g / 10 ms.