It's a 3-pole (3P) device rated for AC-3 and AC-4 utilisation categories, meaning it's built for switching squirrel-cage motors under full load and for plugging or inching duty. The headline rating: AC-3 at ≤440 V, 16 A, which covers motor control up to roughly 7.5 kW at 400 V three-phase.
That 57 mm depth is the key clearance number for shallow enclosures — it fits standard 200 mm deep cabinets with room for wiring ducts. The preassembled reversing busbar eliminates the need for external cross-wiring between two contactors, which also reduces the chance of a phase-reversal wiring error during commissioning.