Siemens SENTRON 3VA2163-5HN32-0JC0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C, so no derating needed in a warm panel. Breaking capacity hits 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — the high interrupt at 240 V makes it a fit for large transformer-fed or generator-backed distribution where fault current is stiff. The basic switch inside is 3VA21635HN320AA0.
Depth of 86 mm leaves clearance for rear-connected bus stabs in a typical distribution panel.