Breaking capacity is 4500 A Icn at 230 V AC, 50/60 Hz, certified to EN/IEC 60898-1. For industrial panels with higher fault levels, you'd step up to a higher-rated MCB. The thermal-magnetic trip unit gives magnetic pickup at 3 to 5 times In (30 to 50 A for this 10 A unit), which is the standard B-curve window for protecting cable runs and general-purpose loads like lighting, socket outlets, and small appliances. No nuisance trips on inrush from a few fluorescent fittings, but it clears a hard short fast.
Width is 18 mm (2 x 9 mm pitches), so it occupies a single modular space on the DIN rail. That covers most final-circuit cable sizes you'd pair with a 10 A breaker. IP20 rated, so it's fine inside an enclosed panel but not for wet or dusty locations.