The Siemens 3VA2463-6HN32-0AD0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous current, with a maximum breaking capacity of 242 kA at 240 V — that figure drops to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. The 630 A frame is sized for large motor circuits, main feeders, or bus couplers in industrial switchgear.
Thermal derating — the real-world current limit
Above that, the continuous current must be derated: 612 A at 45 °C, 593 A at 50 °C, 575 A at 55 °C, 557 A at 60 °C, 538 A at 65 °C, and 520 A at 70 °C. Maximum power loss is 162 W, so the enclosure ventilation must handle that thermal budget at full load.