The Siemens SENTRON 3VA2325-6KQ32-0AA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current with an ETU860 electronic overcurrent release. Its interrupting capacity hits 242 kA at 240 V and 187 kA at 415 V — numbers that tell you this breaker handles high-fault locations like main switchboards or large motor control centers without cascading upstream. The 800 V rated insulation voltage (Ui) means it's comfortable in 480 V and 600 V class systems as well.
Current rating and thermal performance
The 250 A rating holds flat from 40 °C all the way to 70 °C ambient — no derating curve to chase in a warm enclosure. That's a solid advantage for a panel sitting near a furnace line or in a non-conditioned electrical room. The maximum power loss is 37.5 W, which helps when sizing enclosure ventilation.
Protection and communication
The ETU860 release is an electronic trip unit — adjustable long-time, short-time, instantaneous, and ground-fault protection curves. Ground-fault monitoring uses summation current formation on the L-conductor, so you get GF protection without an external CT block. Communication function is built in, which means this breaker can talk to a BMS or SCADA system for remote trip indication and power monitoring — no separate comm module needed.
Mounting and environment
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — fits standard MCCB panel cutouts. Front face carries IP40 protection, so it's fine in a clean indoor panel but not for washdown areas. Operating temperature range is -25 °C to 70 °C; storage range goes from -40 °C to 80 °C. An optional motor drive is available for remote switching.