The Siemens 3RH1131-1AF00 is a SIRIUS auxiliary contactor in size S00, carrying three normally-open instantaneous contacts and no delayed or lagging switching. The IP20 front protection means it is intended for installation inside an enclosure, not for exposed washdown areas.
Switching capacity and contact reliability
Rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — these are the thermal current limits for the NO contacts under AC duty. The contact reliability spec calls for one incorrect switching operation per 100 million cycles at 17 V, 1 mA, which is a standard figure for dry-circuit signal switching in PLC or relay logic.
Screw terminals accept solid conductors: 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), or 2x 4 mm². Shock resistance is 10g / 5 ms and 5g / 10 ms.
