At 415 V it still holds 121 kA, dropping to 75.6 kA at 440 V and 17 kA at 500 V and 690 V, so the SCCR you need drives which voltage tap you spec against. Thermal derating is mild: the breaker holds 40 A up to 50 °C ambient, then steps down to 39 A at 55 °C, 38 A at 65 °C, and 37 A at 70 °C. That means in a warm panel — say a packed MCC bucket near other heat sources — you lose only 3 A at the top of the operating range. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm high — a standard 3-pole MCCB footprint that fits most Siemens and third-party distribution blocks without re-drilling.
Auxiliary hardware and integration
The two HQ auxiliary switches provide status feedback (open/closed) to a PLC or panel indicator, one normally open and one normally closed contact set per switch. The base switch is order code 3VA11405EF360AA0, so if you are replacing the internal mechanism on an existing install, that is the sub-assembly number. No trip indicator, no voltage trigger, and no ground-fault monitoring on this version — it is a straight thermal-magnetic line-protection MCCB with undervoltage release.