The Siemens 3RH7131-1AH00 is a SIRIUS contactor relay in size S00, carrying 3 normally-open and 1 normally-closed auxiliary contacts (31 E switching-element identifier). The AC coil draws 27 VA pick-up power and 5.4 VA holding power at a power factor of 0.8 and 0.27 respectively, making it a standard choice for 24 V, 110 V, 220 V, 230 V, and 400 V control circuits where switching frequencies up to 1,000 operations per hour at DC-13 duty are required. Rated operational current spans 6 A at 24 V, 230 V, and 400 V, 1 A at 110 V and 690 V, and 0.3 A at 220 V — these values govern the contact rating for the specific voltage applied in the circuit.
The 45 mm wide, 72 mm deep, 57.5 mm high footprint snaps onto a standard 35 mm DIN rail, with screw and snap-on fastening. Terminals accept 2 x (0.5…1.5 mm²), 2 x (0.75…2.5 mm²), or 2 x 4 mm² solid or stranded wire, and 2 x (0.5…1.5 mm²) or 2 x (0.75…2.5 mm²) finely stranded with ferrule — covering most control-circuit wiring in a standard panel.
The 3RH7131-1AH00 is a current-production SIRIUS contactor relay, meaning it can be specified into new designs and ordered as needed for BOM replenishment or line-down replacements.
Auxiliary contacts are rated for PLC control reliability at 17 V, 5 mA, meaning the relay can switch low-level signals typical of programmable logic controller inputs without contact oxidation issues. Surge voltage resistance is rated at 16 kV, and shock resistance is specified at 15g / 5 ms and 8g / 10 ms for sine pulse, and 10g / 5 ms and 5g / 10 ms for rectangular impulse — suitable for industrial environments with vibration. Operating temperature range is -10 to +55 °C during operation, with storage from -25 to +70 °C. Installation altitude is limited to 2,000 m above sea level.