What this MCCB delivers on the line
The Siemens SENTRON 3VA2163-8KQ36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C through 70 °C ambient — no derating needed across that span, which simplifies panel thermal budgeting. Its breaking capacity hits 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V, giving you selectivity headroom for high-fault utility feeds or transformer secondaries. The unit carries a ground-fault monitoring function via summation current formation on the line conductor, and includes a communication function for integration into a plant monitoring system.
Sizing and selectivity — what the ratings mean for your panel
The 63 A full-scale value is the frame rating; the adjustable thermal-magnetic trip range spans 95 A minimum to 756 A maximum, so this breaker covers downstream feeders from moderate motor circuits up to high-current bus ties. The 800 V rated insulation voltage means it is rated for 690 V line-to-line systems without de-rating the dielectric. The 3.1 W maximum power loss keeps enclosure heat rise low — relevant when packing multiple breakers in a closed panel. The communication function allows remote trip indication and load monitoring, which is useful for predictive maintenance on continuous-process lines.
Panel integration and physical fit
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep. It mounts on a DIN rail or direct panel-mount via the SENTRON mounting base. The 3-pole footprint matches standard SENTRON 3VA2 series cutouts; verify the 105 mm width against existing busbar spacing if retrofitting into an older panel. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C.