SENTRON 3VA2440-5HL32-0DH0 — 400 A MCCB with undervoltage release
That flat thermal curve simplifies panel sizing: you don't have to oversize the frame for a warm enclosure. Breaking capacity is specified per voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V. For a 480 V distribution panel, the 121 kA at 440 V figure is the closest published benchmark — well above typical utility fault levels, so selectivity coordination with downstream breakers is straightforward. The adjustable current rating range spans 600 A minimum to 4800 A maximum, giving the installer headroom to tune the trip threshold to the actual load without swapping the breaker frame.
Undervoltage release and auxiliary switching
The HQ contact changes state only on a fault trip (not on manual open), so it can drive a remote alarm or PLC input that distinguishes a deliberate shutdown from a protective trip. The base switch without auxiliaries is order code 3VA2440-5HL32-0AA0.
Panel fit and thermal management
Maximum power loss is 66 W at rated current, which should be factored into enclosure ventilation calculations, especially in a multi-breaker lineup.