This contactor is rated for AC-2 duty at 7.5 kW and AC-4 duty at 15.5 A, both at 400 V. AC-2 covers slip-ring motor starting — think crane hoists or conveyor drums — while AC-4 handles plugging and inching, where the contactor breaks full locked-rotor current. If you're coordinating with upstream motor-protective breakers, the 25 A fuse limit is the one to design around.
Main current circuit terminals are screw-type, accepting 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or up to 2x 4 mm² solid. For stranded wire, the range goes to 2x 10 mm². AWG equivalents are 2x (16...12) and 2x (14...10) solid, or single 8 AWG. That covers most panel wiring up to about 30 A branch circuits. Auxiliary contacts are rated for switching at various control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. The DC switching capability is notably limited — at 220 VDC it's only 0.3 A, so don't plan on switching DC motor fields or solenoid valves at that voltage without checking the curve.