Rated at 37 kW at 500 V in AC-3 duty (standard motor switching) and 18.6 kW at 690 V, it covers the common European motor voltage bands. For heavy inrush or reversing duty, the AC-4 rating is 55 A at 400 V — that's the figure to check if the application involves plugging or jogging.
AC-1 maximum switching frequency is 1 000 cycles per hour, which is fine for most pump and fan cycling; AC-4 maxes out at 300 cycles per hour — if the application needs faster reversing, the contactor will overheat.
Termination and enclosure fit
Solid wire capacity is 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²); stranded accepts 2x (10 to 50 mm²) for the power connections. The control circuit terminals take 2x (2.5 to 16 mm²) solid or stranded. Dimensions are 146 mm high, 70 mm wide, 152 mm deep — the depth is the dimension that sticks out from the DIN rail, so check panel depth clearance.
Substance prohibitance (RoHS) is declared per the date above. For UL, CSA, or other agency approvals, the nameplate and manufacturer declaration should be consulted; the evidence does not list specific marks, but SIRIUS contactors typically carry IEC and UL certifications.