What it is and where it fits
The Siemens 3RH1131-1AK60 is a SIRIUS auxiliary contactor, size S00, with three normally-open instantaneous contacts and no normally-closed or delayed poles. It's the switching element for control circuits — think PLC outputs driving contactor coils, signal interlocking, or status feedback in a motor control center. The 45 mm width and screw-and-snap-on mounting mean it clips directly onto a DIN rail in a standard panel enclosure, with the mounting position allowing ±180° rotation on a vertical surface and ±22.5° tilt forward or backward.
Contact ratings — what the numbers mean for your circuit
The three NO contacts are rated for different currents depending on the voltage they switch. At 24 V the contact carries 10 A; at 230 V it's 6 A; at 400 V it drops to 3 A; at 690 V it's 1 A. For DC switching, at 110 V it handles 1 A, at 220 V it's 0.27 A. These are the thermal continuous ratings — the contact can hold that current indefinitely without overheating. The mechanical life is 30 million operations typical, and contact reliability is specified as one incorrect switching per 100 million operations at 17 V, 1 mA, which matters when you're switching dry logic-level signals from a PLC output.
Termination and wiring
The screw terminals accept solid conductors: two wires of 0.5 to 1.5 mm², two of 0.75 to 2.5 mm², or a single 4 mm². That covers most control-circuit wiring in a panel — 1.5 mm² for signal runs, 2.5 mm² for short power feeds. The IP20 front protection keeps fingers out but doesn't seal against dust or moisture, so it's for indoor panel use only.
Environmental and compliance
Operating temperature range is -25 to +60 °C; storage and transport go from -55 to +80 °C. Shock resistance is 10g for 5 ms and 5g for 10 ms, which covers most industrial vibration environments. Pollution degree 3 means it's rated for conductive pollution or dry non-conductive pollution that becomes conductive due to condensation — typical for control panels not in a clean room. The part is RoHS-compliant per the substance prohibition date of July 1, 2006. The lifecycle stage is current production.