The Siemens SENTRON 3VA2340-0HN32-0AA0 is a 3-pole molded case circuit breaker rated for 400 A continuous current with a breaking capacity of 440 kA at 415 V AC — that's the short-circuit rating that governs selectivity in a main or feeder position.
Thermal derating — where the 400 A holds and where it drops
At 55 °C it derates to 385 A, at 60 °C to 370 A, at 65 °C to 355 A, and at 70 °C to 340 A.
The IEC 81346-2 reference code Q confirms it's classified as a switching device in the panel schematic.
Breaking capacity across voltage levels
The 690 V rating still covers most industrial 480/600 V class installations with headroom.
What's not on this variant
If you need any of those — remote signaling, shunt trip, GFCI — this isn't the order code. The ETU350 release is electronic, so it does provide zone-selective interlocking (ZSI) capability if paired with a compatible upstream breaker, but that's a system-level feature, not a built-in module on this unit.