It mounts on 35 mm or 75 mm standard DIN rails via screw or snap-on fastening, so it integrates into existing panel layouts without custom bracketry. Rated for AC-2 duty at 37 kW at 400 V, this contactor handles wound-rotor motor loads where starting current is moderate. The AC-3 rating of 45 kW at 500 V covers standard squirrel-cage motors, and the AC-4 rating of 66 A at 400 V handles plugging and inching duty cycles.
For standard induction motors, the AC-3 rating of 45 kW at 500 V is the one to check against your motor nameplate. If your application cycles motors in reverse or does frequent inching, this is the rating that governs contact life. IP20 on the front with cover or box terminal means the front face is finger-safe once installed in an enclosure; the terminal area itself is IP00, so the contactor must be housed in a panel with proper guarding.
Solid wire accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²). Stranded wire accepts 2x (10 to 50 mm²). This range covers control wiring through motor feeders, so you won't need adapters for mixed wire sizes. Dimensions are 146 mm high, 70 mm wide, 139 mm deep — the S3 frame size is a standard footprint that fits alongside other SIRIUS components on the same DIN rail without side clearance issues, since side-by-side mounting is permitted.