The Siemens 3VA2463-5HN32-0CC0 is a SENTRON 3VA2 molded case circuit breaker rated for 630 A continuous current at 40 °C, 3-pole, configured for line protection.
Interrupting capacity and thermal derating
Interrupting capacity is voltage-dependent: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V. Thermal derating is published in 5 °C steps from 40 °C to 70 °C: 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 the panel ambient runs at 50 °C, you're sizing for 593 A, not 630 A.
Dimensions: 138 mm wide, 248 mm tall, 110 mm deep. That 138 mm width is a 3-pole frame — check your backpanel gland-plate cutout and busbar spacing before committing the drill pattern.