It is rated for 37 kW at AC-2 duty at 400 V, which covers slip-ring motor applications, and carries a 66 A rating at AC-4 at 400 V for reversing or inching duty where the contactor makes and breaks stalled rotor current. The terminal area itself is IP00, so the contactor must be housed inside a rated enclosure for washdown or outdoor environments.
The AC-2 rating of 37 kW at 400 V is the motor-switching figure that governs most slip-ring motor applications — it is the rating to match against your motor nameplate, not the higher AC-1 resistive rating. Mechanical life is typical at 10 million operations. The coil is rated at 110 V, with a pick-up threshold of 0.8 x rated value and a drop-out of 1.1 x rated value.