It carries a 37 kW rating at 500 V and 18.6 kW at 690 V under AC-3 duty, which covers the majority of three-phase induction motor applications in that power band. Rated for a -25 °C to +60 °C operating ambient and pollution degree 3, it suits the typical conditions inside a non-conditioned industrial enclosure where conductive dust or humidity may be present. The front terminals carry IP20 protection; the terminal body itself is IP00, so the panel builder must maintain separation from live parts.
The AC-3 motor-switching rating of 37 kW at 500 V and 18.6 kW at 690 V tells you the contactor can handle the locked-rotor inrush and break the running current of a motor up to those power levels. For a 400 V line, the corresponding rating is 37 kW — so this contactor covers a 37 kW motor at 400 V as well. Mechanical life is listed at 10 million operations typical; electrical life varies by duty: up to 1,000,000 operations per hour at AC-1 (resistive) and AC-3, but drops to 300 per hour at AC-4 (plugging/reversing). If your application involves frequent inching or reversing, the AC-4 limit governs the service interval. Coil operating range spans 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz, ensuring reliable pick-up even if the line sags.
Main current circuit connections are screw-type terminals. The power circuit accepts solid conductors 2x (0.25 … 2.5 mm²) and stranded 2x (10 … 50 mm²), with an intermediate range of 2x (2.5 … 16 mm²) for either solid or stranded. This covers control wiring through to heavy motor cables without needing adapters. Dimensions: 146 mm high, 70 mm wide, 139 mm deep.