It's rated for 18.5 kW at 400 V in AC-3 duty (squirrel-cage motors) and 15 kW at 400 V in AC-2 duty (slip-ring motors), so the AC-3 figure is the one you size for a standard induction motor on a conveyor or pump.
At 55 mm wide and 112 mm tall, it fits a standard 6-module wide slot in a panel.
Main circuit terminals accept solid wire from 0.5 mm² up to 4 mm² (two conductors per clamp) and stranded from 0.75 mm² up to 25 mm². That 25 mm² stranded capacity is generous for an S2 contactor — it means you can land a 6 AWG feed without a ferrule if the lug is rated for it. The control circuit (coil) terminals are separate; the evidence doesn't specify their wire range, but standard practice on this series is 0.5–2.5 mm². Strip length for all terminals is typically 10–12 mm; use ferrules on stranded wire below 1.5 mm² to avoid whiskers under the screw.
Pollution degree 3. RoHS compliance with substance prohibition date of 05/01/2012.