What this MCCB carries and where it fits
The Siemens SENTRON 3VA2225-6JP32-0AA0 is a 3-pole molded case circuit breaker rated 250 A continuous (Iu) with an ETU550 electronic trip unit. It is configured for line protection. Thermal derating is published across the full operating range: full 250 A up to 50 °C, then 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. For a panel OEM or MRO planner, that means if the breaker lives in a non-climate-controlled enclosure that hits 60 °C in summer, you must load it at 225 A or less — the rating is real, not a marketing number. Maximum power loss is 48 W, which matters for enclosure heat-budget calculations. Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a 3-pole frame that fits standard SENTRON 3VA mounting patterns. Front protection is IP40, so it is splash-safe in a closed panel but not washdown-rated.