The interrupting ratings tell you where this breaker can safely clear a fault: 100 kA at 230 V and 400 V AC, 42 kA at 500 V AC, and 4 kA at 690 V AC. Ground fault detection is not included, so if that's required, plan for an external GF module.
Integration notes — wiring and clearances
Screw-type terminals on the main current circuit accept 2x (0.75 to 2.5 mm²) solid or stranded, or 2x 4 mm². The screwdriver shaft should be 5 to 6 mm diameter, Pozidriv size 2 tip. Clearance requirements: 50 mm upwards and downwards, 30 mm at the sides, zero forwards and backwards — so it can sit flush against the back panel. The gG fuse backup ratings at 400 V (50 A), 500 V (40 A), and 690 V (40 A) should be matched when coordinating with upstream protection.