The Siemens SENTRON 3VA2163-5HN36-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. Interrupting capacity is 187 kA at 240 VAC, 121 kA at 415/440 VAC, 75.6 kA at 500 VAC, and 3.7 kA at 690 VAC.
The 63 A frame holds solid through 70 °C ambient — if your panel runs hot near a drive or transformer, this breaker won't trip early. At 690 VAC the 3.7 kA figure drops sharply — verify your system voltage against the curve before specifying this frame for 690 V service.