Siemens 3VA2225-6HN32-0AH0 — 250 A SENTRON MCCB with ETU350
The Siemens 3VA2225-6HN32-0AH0 is a 3-pole SENTRON molded case circuit breaker rated for 250 A continuous current (Iu) and fitted with an ETU350 electronic trip unit for line protection. Breaking capacity reaches 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 6 kA at 690 V — the 240 V figure covers most North American 240/277 V distribution panels, while the 415/440 V ratings handle European 400 V industrial mains. Current rating holds at 250 A from 40 °C through 50 °C ambient, then derates linearly to 213 A at 70 °C — the full thermal curve is documented, so no guesswork for high-temp enclosures.
What the ratings mean for your panel
The 242 kA SCCR at 240 V means this breaker can safely interrupt a fault current up to that level without upstream fuses needing to clear first — useful for high-capacity transformer secondaries or busway taps where available fault current runs high. Dimensions are 105 mm wide, 181 mm high, 86 mm deep. Front IP40 protection means the breaker face is protected against tools and wires >1 mm — standard for enclosed panel mounting; no gasket needed for dry indoor locations.
Lifecycle and sourcing reality
The ETU350 trip unit is the base electronic release for the 3VA2 platform — no communication module, no ground-fault monitoring, no undervoltage release on this order code. If you need those, the 3VA2 family carries plug-in accessory slots for later addition.