What this MCCB carries and where it lands
The Siemens 3VA2110-5MN32-0DA0 is a SENTRON molded case circuit breaker (MCCB) rated 100 A continuous across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. Three poles, motor protection design with integrated phase failure detection and an undervoltage release (UVR) built in. That UVR means the breaker trips if control voltage drops, which is standard for motor starter feeder circuits where loss of control power should drop the load. Breaking capacity hits 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA at 240 V is a high-interrupting rating — it handles faults on large secondary-side transformers or high-capacity busways without cascading upstream. The 3.7 kA at 690 V tells you this is a 600 V class frame, not a full 690 V performer; at that voltage the breaker is basically a disconnect, not a fault-interrupting device. Dimensions are 181 mm high, 105 mm wide, 86 mm deep. That 105 mm width is a three-pole frame — fits standard panel cutouts for 100 A MCCBs. No communication function, no ground-fault monitoring, no trip indicator. This is a straight motor-protection breaker with undervoltage release; if you need remote trip indication or GF protection, you step up to a different 3VA2 variant.
Panel fit and wiring notes
Mounts on a standard DIN rail or panel-mount base — the 105 mm width matches the 3VA2 three-pole footprint. The undervoltage release coil needs a separate control power feed; verify polarity on the UVR terminals if using DC control voltage. Phase failure detection is internal, no extra module required. Power loss is 12.5 W max — negligible for thermal budgeting in a standard enclosure, but worth noting if you're packing multiple breakers in a sealed box.