The Siemens SENTRON 3VA2450-7KQ32-0AA0 is a 3-pole molded case circuit breaker rated for continuous 500 A at 40 °C, with the ETU860 electronic trip unit handling the overcurrent protection logic. At 415 V and 440 V it still holds 242 kA, and at 690 V it drops to 9 kA, which is the standard derate for this class of breaker above 600 V. The IP40 front protection keeps dust and tools out of the mechanism in a clean panel environment.
At 55 °C it derates to 477 A, at 60 °C to 455 A, at 65 °C to 432 A, and at 70 °C to 410 A.
It mounts into a standard SENTRON 3VA panel footprint with bolted bus connections. The 3-pole form factor matches existing 3VA-series switchboard and distribution panel cutouts.