Its 3 kA breaking capacity per IEC 60947-2 at 230/400 V AC is the fault-interrupt rating that governs SCCR coordination downstream; on a 10 kA prospective fault current this breaker is not the main service entrance device but works behind a current-limiting upstream fuse or higher-rated MCB. The 3-pole design (3 MW, 54 mm wide) switches all three phases simultaneously, so it fits a standard 3-phase distribution board without a neutral pole.
Mounting and integration — DIN-rail fit and panel constraints
The 54 mm width (3 modular units) matches the standard 18 mm/module grid, so it occupies three adjacent positions. Mounting position is any — vertical, horizontal, or flat — which simplifies layout in tight sub-distribution boards. IP20 with connected conductors — finger-safe from the front but not washdown-rated. Sealable design (can be padlocked in OFF position) for lockout/tagout compliance.