The Siemens SENTRON 3VA2463-8HL42-0AA0 is a 4-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with an ETU320 electronic trip unit designed for line protection. The 630 A frame size means it handles the full load of a large distribution feeder or a heavy industrial load center without needing external current transformers up to that point. That puts this breaker in the high-interrupting category — it clears a bolted fault on a large transformer secondary or a capacitor bank without the arc re-striking. Thermal derating is published across the operating range: 630 A at 40 °C, 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. If your enclosure ambient runs at 50 °C, you must size the downstream load to 593 A or less — the breaker itself does not trip, but the internal temperature rise at full rating exceeds the design margin.
Dimensions: 248 mm height, 184 mm width, 110 mm depth. The 4-pole frame at 184 mm wide occupies 7.24 inches of panel-mount width. IP40 on the front face.