The Siemens SENTRON 3VA2163-5KQ32-0AA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C through 70 °C, with no derating across that ambient range. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V, which puts it squarely in high-fault-duty distribution — think main breaker in a 480 V panel feeding downstream branch feeders.
At 240 V the breaker clears 187 kA; at 415 V it clears 121 kA; at 500 V it clears 75.6 kA; at 690 V it clears 3.7 kA. That steep drop above 500 V is typical for a 63 A frame — the arc energy at 690 V exceeds what the internal arc chutes can stretch in this size. For a 480 V distribution panel the 121 kA rating at 440 V is the relevant figure; it gives headroom above a typical 65 kA or 100 kA available fault current. The 63 A frame also carries a minimum trip threshold of 95 A and a maximum of 756 A, which defines the magnetic trip band for short-circuit protection.