Siemens SIRIUS 3RT1036-1XX10-0AA8 Power Contactor
Rated for AC-3 duty at 30 kW at 500 V and 11.4 kW at 690 V, this contactor handles the typical motor starting and running currents for pumps, fans, and compressors in that power band. The contactor measures 55 mm wide by 142 mm high by 130 mm deep, fitting into a standard S2 footprint on the DIN rail.
The AC-3 rating of 30 kW at 500 V is the key selection figure for a standard squirrel-cage motor load. At 400 V, the AC-3 rating is not explicitly stated in the evidence, but the AC-2 rating at 400 V is 22 kW, which covers slip-ring motor starting. The AC-1 maximum switching frequency is 1,000 operations per hour, while AC-3 allows 800 per hour and AC-4 drops to 300 per hour — these limits govern the duty cycle in high-speed applications like conveyor indexing. For DC switching, the contactor is rated at 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. These are the make-and-break capacities for DC loads, which are significantly lower than AC due to the lack of a natural current zero crossing. This covers most panel wiring from control circuits to main power feeders.
The part carries a RoHS compliance date of May 1, 2012, confirming it meets the EU Restriction of Hazardous Substances directive for the current production batch. The substance prohibitance date indicates the design was verified compliant as of that date.
The S2 size footprint is shared across the SIRIUS 3RT1 and 3RT5 families, so the panel cutout and rail position are consistent. Side-by-side mounting is allowed, which means no gap is required between adjacent contactors for thermal reasons.