In AC-3 motor duty at 400 V, it's rated for 20 A operational current, which translates to roughly 7.5 kW for a standard 4-pole induction motor. That's the real-world sizing number for the buyer: the 20 A continuous rating covers the motor full-load current, and the magnetic short-circuit release handles the inrush.
Breaking capacity drops to 10 kA at 690 V, so if you're running a 690 V motor circuit, the available fault current must be under that threshold or you need an upstream current-limiting device. The part is finger-safe (IP20 on the front, touch protection per the standard).
This is a DIN-rail-mountable MCCB (screw fixing, but the footprint matches standard 90 mm width for a 3-pole device). Main circuit connections are screw-type terminals on the front side, with separate screw terminals for the auxiliary and control circuit. An auxiliary switch can be added as a product extension — useful for remote status feedback to a PLC. Dimensions: 130 mm high, 90 mm wide, 70 mm deep. Zero clearance at back and sides means no forced spacing between units on the rail.