What this MCCB carries and where it fits
The Siemens SENTRON 3VA2225-7KP32-0KA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with a maximum interrupting capacity of 330 kA at 240 V and 242 kA at 415 V. It's designed for line protection in distribution panels, with a built-in shunt trip release and communication function for integration into monitored power systems.
Interrupting capacity and thermal derating
The interrupting capacity drops from 330 kA at 240 V to 242 kA at 415 V and 440 V, then to 187 kA at 500 V, and down to 4.5 kA at 690 V — that steep fall at 690 V means this breaker is sized for 400 V-class systems, not 690 V main feeds. Thermal derating is minimal up to 50 °C (still 250 A), but above that it drops: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If your panel ambient runs hot, the continuous current you can actually pull is the derated figure, not the nameplate 250 A.
Panel fit and integration notes
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint for DIN-rail or panel-mount installation. The shunt trip release allows remote tripping from a safety circuit or emergency-stop chain, and the communication function supports integration with a BMS or power monitoring system. Maximum power loss is 48 W, so factor that into enclosure ventilation if the panel is densely packed.