What this SIRIUS Size S2 power contactor is
The Siemens 3RT1036-1AM20 is a SIRIUS-brand power contactor in Size S2, designed for switching motor loads and resistive loads in industrial control panels. It mounts via screw and snap-on onto 35 mm standard DIN rail per DIN EN 50022, and accepts side-by-side mounting to save rail width in dense enclosures.
Key ratings and what they mean for fit
Rated 30 kW at 500 V AC-3 (motor switching), 22 kW at 400 V AC-2 (slip-ring motor duty), and 11.4 kW at 690 V. The AC-3 figure governs the motor-starting current you can safely switch — this contactor handles a 30 kW induction motor on a 500 V line. The AC-2 rating at 400 V covers wound-rotor or reversing applications where the load stays engaged during switching. Screw-type terminals on the main current circuit accept stranded wire up to 2x 25 mm² and solid wire up to 2x 4 mm². The control circuit terminals accept 0.5 to 4 mm² solid. That range covers most panel wiring from 14 AWG through 4 AWG without adapters — wires up clean with a ring or fork terminal.
Mounting and environment
Snap-on mounting onto 35 mm DIN rail per EN 50022. The front face carries an IP20 rating — protected against finger contact; the terminal area is IP00 (open), so the contactor relies on the enclosure for overall ingress protection. Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. Pollution degree 3 means it tolerates conductive dust in a typical industrial panel environment.