That 400 A holds steady all the way up to 50 °C — you only start derating at 55 °C (385 A), dropping to 340 A at 70 °C. For a 4-pole frame this gives you solid headroom in a warm panel without having to oversize the breaker.
Breaking capacity is the headline here: 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and still 7.5 kA at 690 V.
This is a current-production part — lifecycle stage is active. The auxiliary switch configuration is 2 auxiliary switches HQ. No ground-fault monitoring, no communication function, no trip indicator, no voltage trigger.
Panel fit: 248 mm high, 184 mm wide, 110 mm deep. The 184 mm width for a 4-pole frame is standard for the SENTRON 3VA platform, so if you're swapping in a panel that was laid out for a 3VA2225-5HN42-0BB0, the footprint matches. No rewiring needed on the line or load side as long as the lug kit is the same.
Power loss is 98.5 W maximum — factor that into your enclosure thermal calculation, especially if you're grouping multiple breakers. The basic switch variant is 3VA2340-5HN42-0AA0 if you need the bare breaker without auxiliaries.