The Siemens 3VA2010-5JQ32-0AH0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It's a 3-pole unit rated at 100 A continuous, with an adjustable thermal-magnetic trip unit that can be set from 20 A up to the full-scale 100 A, so one breaker body covers a range of load sizes on the shelf. Breaking capacity is the headline here: 187 kA at 240 VAC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3 kA at 690 V. That 187 kA figure at 240 V means it can interrupt a massive fault without the arc flashing over — critical for high-available-fault-current panels near transformers or large motor banks. The 3 kA at 690 V is a reminder that this is a 600 V class breaker; at 690 V you're at the edge of its rating and need to check the application. Thermal performance is flat across the board: the breaker carries its full 100 A from 40 °C up to 70 °C ambient without derating. That's unusual — most MCCBs start to lose capacity above 40 °C. Means you can pack it into a warm enclosure or mount it next to other heat sources and still get the full rating.
Integration and fit
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard SENTRON 3VA2 frame footprint. It's a panel-mount unit, not a plug-in base; you bolt the line and load lugs directly. The 105 mm width fits the typical 3-pole MCCB cutout in a distribution panel. Comes factory-fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ designation), so you get remote status indication without adding a separate accessory block. The ground-fault monitoring version uses summation current formation on the L-conductor — meaning it measures the vector sum of phase currents to detect leakage, not a separate neutral CT. Power loss is 13.5 W maximum at rated current. That's low enough that ventilation in a typical panel is adequate, but worth checking if you're stacking multiple breakers in a sealed enclosure.