What this MCCB does on a line
The Siemens SENTRON 3VA2063-6HL32-0CL0 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 — no derating needed up to that ceiling. The interrupting capacity runs 242 kA at 240 V, 187 kA at 415 V, and 121 kA at 500 V; at 690 V it drops to 3 kA, so keep that in mind if you are feeding a 690 V bus. The basic switch assembly is order code 3VA20636HL320AA0.
That is a 4.13 by 7.13 by 3.39 inch footprint — standard for a 3-pole SENTRON MCCB in this frame size.
The minimum breaking current is 95 A, so it clears low-level faults cleanly.
