What this MCCB delivers in a panel
Its ETU560 electronic trip unit gives you adjustable long-time and short-time delay settings — tr from 0.5 to 25, tsd up to 0.5 s — so you can dial in selectivity with downstream breakers without sacrificing coordination. Front protection is IP40 — fine for a deadfront enclosure, but keep the dust and slurry out of the vents if you're mounting it in a mill MCC.
The interrupting ratings on this breaker aren't just bragging numbers — they govern whether it survives a bolted fault without venting or welding closed. At 240 V it's rated 440 kA, which is typical for a main on a large transformer secondary.
The IP40 front protection means enclosed mounting. Communication function is present.
The closest functional sibling in the SENTRON line is the 3VA2125-8KQ42-0AA0. Both are 3-pole, 25 A MCCBs with ETU560 releases. The key difference: the 3VA2125-8KQ42-0AA0 carries a higher interrupting rating — 200 kA at 690 V versus this unit's 53 kA. Otherwise, the 3VA2025-8JQ32-0AA0 is the same trip unit, same dimensions, same accessory compatibility. No rewiring needed if you swap between them in the same panel — just verify the SCCR on the nameplate matches your system.