Its AC-2 rating at 400 V delivers 37 kW, which covers the majority of 50–75 hp motor applications at that voltage — the rating that governs motor starting and reversing duty, not just steady-state running.
The AC-3 rating at 500 V is 45 kW, and at 690 V it is 21.1 kW — the voltage-dependent power curve typical of SIRIUS contactors. For a 400 V line, the AC-3 rating is not directly listed in the evidence, but the AC-2 figure of 37 kW at 400 V gives a conservative bound: AC-3 switching is less stressful than AC-2, so the contactor will handle at least that motor power under normal running starts.
The main circuit terminals accept solid conductors from 2x (0.25 to 2.5 mm²) and stranded conductors from 2x (10 to 50 mm²), with an intermediate range of 2x (2.5 to 16 mm²) for either solid or stranded. The auxiliary contact terminals accept 2x (0.25 to 2.5 mm²) solid. The depth of 139 mm, width of 70 mm, and height of 146 mm determine the panel cutout and clearance for the arc chute.