SENTRON 3VA2110-5HM32-0AA0 — 100 A MCCB for Line Protection
The Siemens SENTRON 3VA2110-5HM32-0AA0 is a 3-pole molded case circuit breaker rated for 100 A continuous current, designed specifically for line protection in distribution panels. It carries a full 100 A without derating across its entire operating temperature range from -25 °C to 70 °C — a useful trait when the breaker sits in a warm enclosure near other heat sources. Breaking capacity is the headline here: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA at 240 V means it can safely interrupt very high fault currents typical on the secondary side of large step-down transformers — a spec that matters when the available fault current at the panel is known to be high. The unit includes ground-fault monitoring via summation current formation on the L-conductor, and is configured as a line-protection device — no undervoltage release, no communication function, no trip indicator. It's a straightforward, high-interrupting-capacity MCCB for main or feeder protection where remote monitoring isn't required.
Mounting and Panel Fit
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard SENTRON 3VA footprint. The 105 mm width (4.13 in) across three poles means it occupies three 35 mm DIN-rail modules, so check your rail fill factor before committing. Depth of 86 mm (3.39 in) clears most 120 mm-deep enclosures with room for wiring gutters. Rated insulation voltage is 800 V, and maximum power loss is 10 W — negligible for thermal budgeting in a ventilated panel, but worth noting if the enclosure is sealed and densely packed.