The IP20 finger-safe enclosure means it is intended for installation inside a panel or enclosure, not in a wet or dust-laden environment.
Rated short-circuit breaking capacity Icn is 10 kA per IEC 60898 — the standard for household and similar installations. The ultimate breaking capacity Icu is 25 kA per IEC 60947-2, which is the industrial standard. The Icu figure governs fault clearing in an industrial panel where the prospective short-circuit current may exceed 10 kA; the breaker safely interrupts faults up to 25 kA without damage to the enclosure or upstream gear.
