SENTRON 3VA2163-6HN32-0KH0 — 63 A MCCB, line protection, current production
Breaking capacity runs 242 kA at 240 V, 187 kA at 415/440 V, 121 kA at 500 V, and 3.7 kA at 690 V — the 240 V figure is the headline for high-fault commercial services.
Breaking capacity by voltage — where the 242 kA matters
At 240 V the breaker interrupts 242 kA — that is the high-fault rating for a 63 A frame. At 415/440 V it drops to 187 kA, at 500 V to 121 kA, and at 690 V to 3.7 kA. The 690 V figure is low enough that you would check coordination with upstream devices before using this breaker on a 690 V feeder. For a standard 480Y/277 V panel the 187 kA at 440 V is the relevant number, and it gives substantial SCCR headroom over a typical 65 kA or 100 kA rated bus.
This is a current-production Siemens SENTRON breaker.