What this MCCB carries and where it fits
The Siemens SENTRON 3VA2225-7HN32-0AE0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous at 40 °C, designed for line protection in distribution panels and switchboards. It breaks up to 330 kA at 240 V, 242 kA at 415/440 V, and 187 kA at 500 V — numbers that tell you it handles high-fault utility feeds or transformer secondaries without cascading upstream. The 250 A rating holds flat from 40 °C to 50 °C; above that it derates to 241 A at 55 °C and 213 A at 70 °C. That matters if the breaker lives in a hot enclosure — a non-ventilated panel near a process furnace or a roof-mounted switchboard in summer sun will push ambient past 50 °C, and you need the thermal curve to avoid nuisance tripping. At 690 V the breaking capacity drops to 4.5 kA — a signal that this breaker is not intended for 690 V main-fault duty. Use it on 400/480 V distribution where the high interrupting ratings are in play.
Panel fit and integration
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for this current class. Power loss is 48 W maximum at rated current. In a sealed, non-ventilated panel that heat adds up — account for it in the thermal budget if you're packing multiple breakers side by side.
What it does not include
No undervoltage release, no ground-fault monitoring, no communication function, no voltage trip indicator. The auxiliary switch complement is fixed at 4 HQ contacts.