630 A MCCB with high interrupting capacity
The Siemens SENTRON 3VA2463-5HN32-0BH0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a maximum breaking capacity of 187 kA at 240 V AC. That interrupting rating drops to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V — so the application voltage determines the available fault current the breaker can clear. The thermal derating curve is published per the evidence: at 45 °C the continuous rating is 612 A, at 50 °C it is 593 A, and at 70 °C it is 520 A. This matters for panel builders who need to maintain selectivity without upsizing the frame.