The Siemens 3VA2163-6HL32-0DA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a 242 kA interrupting capacity at 240 V — that figure drops to 187 kA at 415 V and 121 kA at 500 V, so the SCCR you design to depends on your system voltage. The 63 A rating holds flat from 40 °C through 50 °C, then derates to 60.6 A at 55 °C and 53.5 A at 70 °C — so in a warm enclosure you lose about 15 % of capacity at the top end.
Dimensions are 105 mm wide × 181 mm high × 86 mm deep — the 105 mm width is a standard 3-pole MCCB footprint for the SENTRON 3VA2 frame, so it drops into existing panel cutouts and busbar systems designed for that frame.