The Siemens SIRIUS 3RH1131-1TP00-0KV0 is a size S00 auxiliary contactor built for control-circuit switching inside panels. It's rated 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — those are the continuous thermal currents (Ith) for the contacts, so the real load determines which voltage/current pair governs your circuit. The varistor surge suppressor is built in, which saves adding a separate snubber on the coil.
Mounting and fit
Width is 45 mm, height 57.5 mm, depth 72 mm — that's the S00 footprint, which drops onto a DIN rail or screws directly to a backplate. The fastening method is screw and snap-on mounting, so you can clip it onto the rail without tools or bolt it down if vibration is a concern. Mounting position is flexible: ±180° rotation on a vertical surface, plus ±22.5° tilt forward/backward. Panel builders will appreciate that the 72 mm depth leaves room for wiring behind the contactor without crowding the gland plate.
Switching and reliability
Contact reliability is rated at one incorrect switching per 100 million operations at 17 V, 1 mA — that's the low-energy switching spec, so it handles PLC-level signals without needing gold-plated contacts. The mechanical life of the contactor is 30 million operations typical. Shock resistance is 10 g for 5 ms and 5 g for 10 ms, which covers most industrial vibration environments. Operating temperature range is -25 to +60 °C; storage and transport handle -55 to +80 °C.
Wiring and compliance
Solid wire sizes accepted: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm². That's the terminal capacity for the auxiliary contacts — two wires per clamp up to 4 mm², which is typical for control wiring. Pollution degree 3 means it's rated for industrial environments with conductive dust or occasional condensation. IP20 on the front protects against finger contact. RoHS compliance is documented with a substance prohibition date of July 1, 2006.