At 415 V and 440 V it still holds 242 kA, and at 500 V it's 187 kA; only at 690 V does it drop to 9 kA, so keep the system voltage under 500 V to get the full short-circuit rating.
If your panel runs hotter — say 50 °C inside the enclosure — the breaker derates to 593 A; at 60 °C it's 557 A; at 70 °C it's 520 A. That's a straight 110 A drop from the base rating, so factor your actual enclosure temperature into the BOM, not the catalog number.
Footprint is 138 mm wide by 248 mm tall, 110 mm deep. That's 5.43 by 9.76 by 4.33 inches. If you need those, you're looking at a different suffix.