What it is — and what the ratings mean for fit
The Siemens SENTRON 3VA2110-7MS32-0KA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at up to 70 °C ambient — no derating needed across the full temperature range, which keeps the line moving in a hot panel without recalculating thermal curves. Its interrupting capacity hits 330 kA at 240 V, 242 kA at 415/440 V, 187 kA at 500 V, and 3.7 kA at 690 V — that 330 kA at 240 V is the figure a site electrical engineer checks first for selectivity on a high-fault transformer secondary; the drop to 3.7 kA at 690 V means this is a 240–500 V workhorse, not a 690 V main. The breaker includes a shunt trip (STL) auxiliary release — wired to a remote emergency-stop or safety relay, it gives you a deterministic trip on command, no undervoltage release here.
Panel fit and mounting
Dimensions: 86 mm deep, 105 mm wide, 181 mm tall — the 105 mm width is the critical number for a multi-breaker lineup on a DIN-rail or panel-mount backplate; it matches the standard SENTRON 3VA2 footprint, so a panel designed for the 3VA2 family accepts this without drilling new holes. Rated for storage from -40 °C to 80 °C and operation from -25 °C to 70 °C; the storage range covers cold warehouses, and the operating range keeps the breaker functional in an outdoor enclosure in moderate climates.