It mounts on 35 mm or 75 mm standard DIN rail via screw and snap-on fastening, so it integrates into a standard panel layout without special bracketry.
Rated 45 kW at 500 V in AC-3 duty, this contactor handles the inrush and run current of a standard squirrel-cage motor up to that power — the rating that matters for most conveyor, pump, and fan starts. The AC-2 rating of 37 kW at 400 V covers slip-ring motor applications where the load current stays closer to the run value during switching. For heavy jogging or plugging duty, the AC-4 rating of 66 A at 400 V tells you the thermal capacity under frequent reversing or inching cycles. The main circuit uses screw-type terminals accepting 2x (10... 50 mm²) stranded or 2x (0.25... 2.5 mm²) solid wire — sized for the motor feeder cable typical of a 45 kW load. Front-side protection is IP20 with a cover or box terminal; the terminal body itself is IP00, meaning the panel enclosure provides the environmental seal.
The SIRIUS series typically carries UL, CSA, and CE approvals for global panel builds — verify the specific certification markings on the nameplate for your jurisdiction.