What this MCCB is and what it protects
The Siemens SENTRON 3VA2010-8KQ42-0AA0 is a 4-pole molded case circuit breaker rated for 100 A continuous current, designed for line protection in distribution panels. Its 800 V rated insulation voltage and breaking capacities ranging from 440 kA at 240 V down to 52.5 kA at 690 V (–) mean it handles high-fault-current service entrance or main feeder duty where upstream transformer capacity is substantial. The 100 A rating holds flat across the entire 40 °C to 70 °C ambient range (–), so no derating curve to track in a warm enclosure — one less variable when sizing the panel.
Communication and monitoring built in
This MCCB carries a communication function and an other measurement function, meaning it can report load current, power, and status over a bus — useful for a BMS or SCADA system watching the main feed. The ground-fault monitoring version uses summation current formation on L + N conductor, so it detects leakage without a separate GFCI module. Maximum power loss is 7.7 W — negligible for enclosure thermal budgeting, but worth noting if the panel is densely packed.
Panel fit and environmental limits
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — a standard SENTRON 4-pole footprint that drops into the existing mounting base without re-drilling. Operating temperature spans -25 °C to 70 °C; storage range is -40 °C to 80 °C. No undervoltage release or trip indicator on this variant, so if remote shunt-trip or local status indication is needed, step to a different order code in the 3VA family.