The Siemens 3VA2063-5HN32-0CA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, with a continuous current Iu of 63 A across the 40 °C to 50 °C band — no derating needed up to 50 °C. Above that it steps down: 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. That means in a warm panel you still get most of the rated current, but above 50 °C you size the load side accordingly. Breaking capacity climbs to 187 kA at 240 V, holds at 121 kA at 415 V and 440 V, drops to 79 kA at 500 V, and settles at 3.4 kA at 690 V. For a 480 V distribution panel that 79 kA gives solid headroom over typical available fault currents — you won't be coordination-limited by the breaker in most commercial or light industrial switchboards. The trip indicator is absent, so you won't get a local flag — plan for remote signaling if needed.
Maximum power loss is 7.9 W, which is modest for a 63 A frame — no special ventilation required in a typical enclosure.