The Siemens SENTRON 3VA2063-8KQ32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in distribution panels. Its breaking capacity reaches 440 kA at 240 V, 330 kA at 415 V, and 52.5 kA at 690 V — the curve tells you where the fault-current ceiling sits for your system voltage. Rated insulation voltage is 800 V, so it handles 480/600 VAC lineups without derating the insulation path.
Key ratings and what they mean for fit
Continuous current holds flat at 63 A from 40 °C through 70 °C — no derating curve to calculate in a warm panel. The 3VA2063-8KQ32-0AA0 keeps its full 63 A rating right up to the 70 °C operating maximum. Breaking capacity is specified at five voltage points: 440 kA at 240 V, 330 kA at 415 V, 330 kA at 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. For a 480 V panel, interpolate between the 440 V and 500 V figures — roughly 275 kA available. That is a high-interrupting frame for a 63 A MCCB; it handles most transformer-fed secondary faults without cascading upstream. A communication function is built in, and the design supports summation-current ground-fault monitoring on the L-conductor. That means it can report trip events and leakage current to a BMS or PLC without an add-on module — useful for coordinated ground-fault schemes in data-center or industrial distribution.
Panel integration notes
Dimensions are 105 mm wide, 181 mm high, 86 mm deep. That is a standard 3-pole MCCB footprint for a 63 A frame. The 86 mm depth is shallow enough for enclosures with wiring clearance behind.