Its interrupting capacity hits 75.6 kA at 240 V AC, stepping down to 52.5 kA at 415 V and 32 kA at 440 V — enough to clear high-fault scenarios downstream of a large transformer without cascading upstream breakers.
Thermal derating and auxiliary hardware
That matters for a tightly packed panel — if ambient inside the enclosure hits 60 °C, you're down to 155 A continuous. The breaker ships with a basic switch (order code 3VA11163EF360AA0) and includes two HQ auxiliary switches plus an undervoltage release (UVR) built in. Max power loss is 40.5 W — factor that into enclosure ventilation.