The Siemens 3VA2225-7HN32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current, with a 3-pole configuration and an ETU350 electronic trip unit.
The continuous current rating holds at 250 A from 40 °C through 50 °C ambient. Above that, it derates linearly: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If the breaker lives in a hot enclosure — near transformers or in a non-ventilated panel — use the 55 °C or 60 °C column for sizing, not the 40 °C number.
Dimensions are 181 mm high, 105 mm wide, and 86 mm deep — a standard MCCB footprint for a 250 A frame.
Trip unit and protection features
It does not include a ground-fault monitoring function, undervoltage release.