What it is and what it does
The Siemens SIRIUS 3RT1036-1AP00-1AA0 is a size S2 power contactor rated for motor switching in industrial control panels. Its AC-2 rating of 22 kW at 400 V covers slip-ring motor duty, while the AC-4 rating of 41 A at 400 V handles reversing or inching applications where the contactor makes and breaks stalled-rotor current. The contactor mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, so it drops into a standard panel layout without extra brackets. Dimensions are 112 mm high, 55 mm wide, 115 mm deep — that's a compact footprint for the S2 frame.
Wiring and termination
Main power circuit terminals are screw-type, accepting solid conductors up to 2x 4 mm² (or 2x 0.5–1.5 mm² for smaller control wiring) and stranded conductors up to 2x 25 mm². That covers most motor feeder cables up to 16 mm² at 40 °C ambient.
Environmental and compliance
Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. Pollution degree 3 suits it for industrial environments with conductive dust or moisture. The substance prohibitance date of 05/01/2012 indicates RoHS compliance per EU directive.