It carries a rated power of 37 kW at 500 V AC-3 duty, and 18.6 kW at 690 V — the AC-3 rating is the one that governs motor switching, not the AC-1 resistive figure. That means for a 37 kW, 500 V motor on a conveyor or pump, this contactor handles the inrush and breaking without welding contacts.
Mounts via screw or snap-on onto 35 mm and 75 mm standard DIN rails — the snap-on feature speeds panel assembly, and the 70 mm width plus 146 mm height fits the S3 footprint common in Siemens SIRIUS motor starter combinations.
Solid wire accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²). Stranded wire takes 2x (10 to 50 mm²) for the larger power feeds. That range covers most motor branch circuits from fractional kW up to the 37 kW rating — the 50 mm² stranded capacity is enough for the full load current without needing a terminal adapter.
Environmental and protection
IP20 on the front with cover or box terminal; the terminal itself is IP00, so it expects enclosure protection in the panel.