It carries a 330 kA interrupting capacity at 240 VAC, stepping down to 242 kA at 415/440 VAC and 187 kA at 500 VAC — numbers that tell you this breaker is sized for high-fault service-entrance or main-tie applications where upstream coordination matters. The auxiliary switch package is a 4-switch HQ configuration, and the basic switch supplied is order code 3VA2340-7HN32-0AA0. It's a straightforward main breaker — no frills, no hidden surprises, just a high-interrupting 400 A frame.
The 400 A rating holds steady up to 50 °C. Above that, it derates: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. That depth is worth checking if you're swapping into an existing panel that was dimensioned around a different MCCB frame — the 110 mm depth is shallower than some older 400 A frames, so it may free up wire-bend space or require a different mounting adapter. Width and height are standard for this class.
Power loss at full rated current is 96 W maximum — a useful number for enclosure thermal calculations if you're stacking multiple breakers in a single panel.