What this MCCB carries
The Siemens SENTRON 3VA2225-6JP32-0AC0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with a breaking capacity of 242 kA at 240 V AC — that's the short-circuit withstand you'd spec for a high-fault service entrance or a large motor control center fed close to the transformer. At 415 V and 440 V it still holds 187 kA, dropping to 121 kA at 500 V and 4.5 kA at 690 V — the curve tells you this breaker is built for low-voltage high-fault applications, not 690 V distribution. Power loss maxes at 48 W, which matters for thermal management inside a sealed enclosure; the unit also includes a communication function for remote monitoring or trip indication.
Integration and mounting
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — fits standard Siemens 3VA panel cutouts and busbar systems; the 3-pole footprint matches the SENTRON family, so a swap from a lower-rated 3VA frame keeps the same drill plan. Comes with two HQ auxiliary switches built in (no separate add-on needed for status feedback), and no undervoltage release or ground-fault module — those are options you add externally if the application demands them.
Thermal derating and operating range
Rated 250 A up to 50 °C ambient; above that it derates stepwise — 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If your panel runs hot, that's the real continuous current you can count on. Operating temperature range is -25 °C to +70 °C; storage from -40 °C to +80 °C — fine for unheated warehouses or outdoor cabinets in temperate climates.