What this contactor is and where it fits
The Siemens 3RT1036-1AR60 is a SIRIUS power contactor in frame size S2, designed for switching motor loads in industrial control panels. It mounts via screw and snap-on onto 35 mm DIN rail per EN 50022, with a 55 mm wide footprint that allows side-by-side mounting without derating gaps.
Key ratings and what they mean for your load
The headline motor ratings are 22 kW at 400 V in AC-2 duty and 30 kW at 500 V in AC-3 duty. AC-2 is the rating that governs for slip-ring motor starting and plugging — the 22 kW figure at 400 V tells you the contactor handles the higher switching frequency and inrush of wound-rotor motors. For standard squirrel-cage motors (AC-3), the 30 kW at 500 V is the limit; at 690 V the AC-3 rating drops to 11.4 kW, so verify your line voltage against that curve. The coil is rated for 400 V at 50 Hz and 400 to 440 V at 60 Hz, with an operating range of 0.8 to 1.1 times rated voltage.
Auxiliary contact capacity and wiring
Built-in auxiliary contacts are rated 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — enough for direct PLC inputs or relay coils on the same panel voltage. Main power terminals are screw-type, accepting stranded wire up to 2x 25 mm² or solid up to 2x 4 mm². The front face carries IP20 protection; the terminal area is IP00, so keep fingers and tools clear during live work.
Environmental and mechanical limits
Rated for operation from -25 to +60 °C, storage from -55 to +80 °C. Pollution degree 3 suits industrial environments with conductive dust or condensation. Mechanical life is 10 million operations typical; maximum switching frequency is 1000 cycles/hour for AC-1 resistive loads, 800 for AC-3 motor loads. Arcing time is 10 to 15 ms, and the contactor picks up in 7 to 20 ms at AC coil voltage.