Its rated short-circuit breaking capacity Icn is 25 kA, with an ultimate breaking capacity Icu of 36 kA. The Icn figure is the service rating — the breaker can clear a 25 kA fault and still be usable afterward. The Icu is the one-shot maximum it can interrupt safely. For a 10 A MCB, 25 kA Icn is high; it gives headroom in high-fault panels where standard 6 kA or 10 kA breakers would need upstream fusing or a current-limiting device. That's unusual for a 10 A MCB and signals this is a high-performance series intended for industrial switchgear, not residential load centers.
Deployment context
DIN-rail mount, IP20 finger-safe enclosure. Screw terminals with a max torque of 3.5 Nm.