The 630 A frame is the continuous rating at 40 °C; it derates predictably as ambient climbs — 612 A at 45 °C, 593 A at 50 °C, down to 520 A at 70 °C. If your panel ambient runs 50 °C, that 593 A effective rating is the number to use for your load calcs. Minimum short-circuit breaking capacity is 945 A, maximum 5 670 A — that's the adjustable magnetic trip range, letting you dial in the instantaneous pickup for cable protection or motor-start inrush without nuisance trips.
The basic switch core is the 3VA2463-7HL32-0AA0, meaning the -0DC0 variant adds the UVR and auxiliary switches on the same frame — same mounting hole pattern, same bus-bar spacing.