What this MCCB delivers in the panel
The Siemens SENTRON 3VA2163-8KQ46-0AA0 is a 4-pole molded case circuit breaker rated for 63 A continuous current, sized for line-protection duty in distribution panels where ground-fault monitoring via summation current (L+N conductor) is required. Breaking capacity hits 330 kA at 415 V and 440 kA at 240 V — that's high enough to sit upstream of a busway or a transformer secondary without worrying about cascading failure during a bolted fault. The 63 A rating holds flat across the entire ambient range from 40 °C to 70 °C, so you don't lose headroom in a hot enclosure or a summer peaking panel. It carries a communication function, which means it can talk to a higher-level monitoring system — useful for remote trip indication or load-shedding coordination without adding a separate module.
Footprint and integration
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — a standard SENTRON 3VA2 footprint that drops into the same DIN-rail or mounting-plate cutout as the rest of the series. Power loss is capped at 3.1 W, so ventilation requirements are minimal even in a densely packed panel.