The headline breaking capacity is 15 kA at 230 V AC per IEC 60947-2, which covers most industrial distribution panels downstream of a main breaker; the UL 1077 / CSA C22.2 No. 235 rating of 5 kA is what matters for North American supplementary-protection applications. The 40 A rating suits branch circuits feeding multiple machines or sub-distribution boards.
Panel integration and environment
Vibration resistance per IEC 60068-2-6 and 10 000 mechanical operating cycles give a solid service life for panel builders.
Electrical characteristics and compliance
Rated operational voltage is 230 V AC single-phase, with a maximum of 250 V AC single-phase and a DC rating of 72 V. Frequency is 50/60 Hz. The breaker accepts supplementary devices like auxiliary contacts or shunt trips.