The Siemens 3VA2163-5HN36-0HA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. Its 187 kA interrupting capacity at 240 V AC means it can safely clear a fault at that level without upstream devices needing to open; at 415 V and 440 V it still holds 121 kA, dropping to 75.6 kA at 500 V and 3.7 kA at 690 V. For a 480 V distribution panel, the 121 kA SCCR at 415 V is the relevant benchmark — this breaker handles high-fault-current scenarios common in industrial mains. The design is line protection, meaning it's intended for feeder or main breaker duty rather than motor branch-circuit protection.
The 3-pole, 63 A footprint matches existing 3VA2 cutouts — if your panel was laid out for a 3VA2 breaker, this drops in without drilling new holes.