At 400 V AC-3 (motor switching), it is rated 63 A, so it directly fits motor circuits up to that current. The unit draws 34 W in hot operating state at AC.
For resistive loads (AC-1), the breaker can carry more, but the AC-3 number is the one to spec against. Breaking capacity is voltage-dependent: 100 kA at 240 V, 65 kA at 400 V, 12 kA at 500 V, and 5 kA at 690 V — so at 400 V it has ample margin for most industrial panels. Mechanical clearance: allow 150 mm above and below the unit for arc venting and cable bending, and 30 mm at the sides. The breaker itself is 70 mm wide, 165 mm tall, and 176 mm deep — that depth includes the terminal overhang, so plan your enclosure depth accordingly.