Siemens SIRIUS 3RT1036-1AP04-3MA0 — Size S2 Power Contactor, 230 V 50 Hz Coil
The Siemens SIRIUS 3RT1036-1AP04-3MA0 is a Size S2 power contactor rated for 22 kW at 400 V in AC-2 duty (slip-ring motor switching) and 30 kW at 500 V. The coil is wound for 230 V at 50 Hz, with an operating range of 0.8 to 1.1 times the rated control supply voltage. This is a current-production part, still in active manufacture. Mounting is via screw and snap-on onto a 35 mm DIN rail per EN 50022, and side-by-side mounting is permitted without derating. The front face carries an IP20 rating; the terminal area is IP00, so live parts are exposed at the wiring plane — standard for panel-mount contactors of this class. Pollution degree 3 means it tolerates conductive dust in industrial environments. Main power circuit connections use screw-type terminals accepting solid conductors from 0.5 mm² up to 4 mm² (two per clamp) and stranded conductors from 0.75 mm² up to 25 mm² (two per clamp). At 40 °C ambient, the minimum permissible conductor cross-section is 16 mm² for full rated current.
Duty Ratings and Switching Capacity
The 3RT1036-1AP04-3MA0 delivers 22 kW in AC-2 at 400 V (slip-ring motor starting) and 41 A in AC-4 at 400 V (plugging/reversing duty). At 500 V it handles 30 kW; at 690 V the rating drops to 11.4 kW. The AC-3 motor-switching rating is the standard workhorse figure for squirrel-cage motors — the AC-4 figure is the one to watch for high-inertia or reversing loads. Switching frequency limits: 1000 operations per hour at AC-1 (resistive), 800 at AC-3, 400 at AC-2, and 300 at AC-4. Mechanical life is 10 million operations typical. Opening time is 7 to 20 ms; arcing time is 10 to 15 ms. Auxiliary contact ratings for DC switching: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. For AC auxiliary loads: 6 A at 230 V, 3 A at 400 V.
Environmental and Compliance
The product designation is power contactor under the SIRIUS brand. Dimensions: 55 mm width, 112 mm height, 164 mm depth.