The SENTRON 3VA2163-7MS36-0AH0 is a 3-pole molded case circuit breaker rated 63 A continuous at ambient temperatures from 40 °C up to 70 °C — no derating needed across that range. Its interrupting capacity hits 330 kA at 240 V AC and stays at 242 kA through 440 V, then drops to 187 kA at 500 V and 3.7 kA at 690 V. This is the starter protection variant (design of the product: starter protection), so it's tailored for motor branch circuits — the trip curve and magnetic pickup are set to handle inrush without nuisance trips while still clearing a bolted fault fast.
Mounting is screw-clamp to the backplate, not DIN rail — make sure your enclosure has the clearance for the 181 mm height above the bus bars.