The Siemens 3VA2110-5JQ32-0DA0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection in distribution panels. Rated 100 A continuous across the full -25 °C to 70 °C operating range, it carries a flat thermal curve — no derating needed up to 70 °C ambient, which simplifies panel layout in warm enclosures. Breaking capacity hits 187 kA at 240 VAC and 121 kA at 415 VAC, dropping to 3.7 kA at 690 VAC. That 187 kA figure at 240 V gives serious fault-current headroom for industrial service-entrance or sub-distribution where the available fault current is high.
Trip range and selectivity
The adjustable thermal-magnetic trip covers 150 A to 1200 A, with the continuous rating locked at 100 A. That means the breaker itself is a 100 A frame, but the trip unit can be dialed to coordinate with downstream protection — useful for selectivity studies where you need a wider pickup band than the frame rating alone suggests. Compared to a fixed-trip MCCB of the same frame, the adjustable range lets you tune the instantaneous pickup without swapping the breaker. For a panel OEM wiring multiple feeds off the same bus, this cuts SKU count — one frame covers several tap ratings.
Panel fit and integration
The 3VA2110-5JQ32-0DA0 measures 105 mm wide, 181 mm tall, and 86 mm deep — a 3-pole MCCB footprint that fits standard Siemens SENTRON mounting bases. Depth stays under 90 mm, so it clears shallow gland-plate enclosures. It ships with an undervoltage release (UVR) fitted, and the basic switch reference is 3VA21105JQ320AA0. A communication function is onboard — expect Modbus or PROFIBUS capability via the SENTRON communication module, though the exact protocol depends on the plug-in accessory chosen. Ground-fault monitoring uses summation current formation on the L-conductor, which means it sums the phase currents to detect leakage without a separate neutral CT. That's a space-saver in retrofit panels where neutral bar access is tight.
Lifecycle and sourcing
Maximum power loss is 12.5 W, which matters for thermal budgeting inside a sealed enclosure. Storage range spans -40 °C to 80 °C, so it can sit in an unheated warehouse without issue.