The Siemens SENTRON 3VA2225-8HL32-0DC0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current Iu of 250 A, fitted with an ETU320 electronic trip unit. It carries a 440 kA breaking capacity at 240 V, stepping down to 330 kA at 415 V and 440 V, 242 kA at 500 V, and 50.4 kA at 690 V — figures that define its fault-interruption capability across common industrial voltage levels.
Thermal derating and operating range
The breaker holds its full 250 A rating from 40 °C up to 50 °C. Above that, derating is linear: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Ambient temperature inside the enclosure governs the actual continuous current the breaker can carry without nuisance tripping.
Dimensions and panel fit
Footprint is 105 mm wide by 181 mm tall, with a depth of 86 mm. That 105 mm width is the critical dimension for DIN-rail or mounting-plate layout — verify the adjacent device spacing against the manufacturer's minimum clearance recommendations.
Auxiliary and undervoltage release
This variant includes an undervoltage release (UVR) as the auxiliary release design, plus two auxiliary switches (HQ). The integrated auxiliary trip is order code 3VA9608-0BB25; the supplied basic switch is 3VA2225-8HL32-0AA0. No voltage-trigger function or communication module is fitted.