Motor-protective MCCB with flat thermal derating
The Siemens SENTRON 3VA2325-7MQ32-0AA0 is a 3-pole molded case circuit breaker (MCCB) designed specifically for motor protection, carrying a continuous rated current of 250 A that holds flat from 40 °C all the way to 70 °C — no derating curve to calculate for typical panel ambient temperatures. Interrupting capacity reaches 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 7.5 kA at 690 V — giving strong fault-clearing headroom across common industrial voltage levels. Built-in communication function, phase failure detection, and other measurement functions make this breaker suitable for integration into monitored motor control centers where trip data and status need to reach a PLC or SCADA layer.
Dimensions are 248 mm high, 138 mm wide, and 110 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON 3VA switchboard or enclosure mounting plates without requalifying bus-bar centers. Maximum power loss is 37.5 W, which should be factored into enclosure thermal calculations when grouping multiple breakers in a sealed cabinet.