The 3VA2225-5HN32-0DL0: At 250 A continuous (rated at 40 °C through 50 °C without derating), this MCCB handles the full load current of a 250 A bus or feeder without nuisance tripping. The thermal derating curve is documented: at 55 °C it holds 241 A, at 60 °C it holds 232 A, and at 70 °C it holds 213 A — critical when the breaker lives in a hot enclosure or near other heat sources. The interrupting ratings span from 187 kA at 240 V down to 4.5 kA at 690 V; for a 480 V panel fed by a transformer with 65 kA available fault current, the 121 kA at 440 V rating provides comfortable margin. The 3-pole design with line-protection trip curve means it clears phase faults and overloads on a feeder or main, not motor or generator protection.
Auxiliary Configuration and Panel Integration
The base switch supplied is 3VA2225-5HN32-0AA0, meaning the UVR and aux package are factory-integrated, not field-added.