What this MCCB delivers
The Siemens SENTRON 3VA2450-7MQ32-0JH0 is a 3-pole molded case circuit breaker rated for 500 A continuous at 40 °C, with a full-scale adjustable range from 100 A to 500 A — meaning you set the trip threshold to match the motor full-load current, not the breaker's maximum. It is designed specifically for motor protection, with phase failure detection and undervoltage release absent (no UVR coil to wire), so it relies on the electronic trip unit for coordinated protection. Interrupting capacity is 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 15.3 kA at 690 V — per the datasheet, these are the maximum fault currents the breaker can safely clear at each voltage level. For a 480 V panel, the 242 kA rating at 440 V is the closest published figure; selectivity coordination studies should use the 500 V value (187 kA) as a conservative bound if the system voltage falls between published points. The electronic trip unit includes a communication function and other measurement functions, plus a trip indicator and voltage trigger. Power loss at rated load is 99 W maximum — factor that into enclosure thermal rise calculations, especially in a sealed panel with multiple breakers.
Integration and mounting
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — fits standard MCCB mounting footprints in switchboards and motor control centers. The 110 mm depth is the body depth, not including handle projection; verify clearance to the enclosure door. Operating temperature range is -25 °C to +70 °C, storage from -40 °C to +80 °C. Three-pole configuration with no undervoltage release means the breaker trips only on overcurrent or via the communication interface — no separate control power required for the trip mechanism. The voltage trigger input allows remote shunt-trip capability if wired externally.