Molded case circuit breaker for motor protection
The Siemens SENTRON 3VA2325-5MN32-0HF0 is a 3-pole molded case circuit breaker (MCCB) designed specifically for motor protection, with a continuous current rating of 250 A across the full ambient temperature range from 40 °C to 70 °C without derating. Its interrupting capacity reaches 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V — covering high-fault industrial service entrances and motor control center feeders.
Dimensions are 248 mm high, 138 mm wide, and 110 mm deep — fits standard panel cutouts for 250 A frame SENTRON MCCBs; the 3-pole footprint matches existing busbar and lug layouts. Maximum power loss is 37.5 W, so ventilation in the enclosure should account for that dissipation at full load.
Rated 250 A continuous without derating up to 70 °C — that flat thermal curve means you don't have to oversize for elevated ambient temperatures in a motor control center. The 187 kA breaking capacity at 240 V is the highest short-circuit current this breaker can safely interrupt; at 690 V it drops to 7.5 kA, so verify the available fault current at your service voltage. Phase failure detection and a trip indicator are integrated — the breaker will trip on loss of phase and show a visual flag, which simplifies troubleshooting on motor feeders.