Rating and fit
The Siemens SENTRON 3VA2110-8KP46-0AA0 is a 4-pole molded case circuit breaker rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed in a warm enclosure. Interrupting capacity hits 440 kA at 240 V, 330 kA at 415/440 V, 220 kA at 500 V, and 52.5 kA at 690 V — high enough for most industrial service-entrance or transformer-fed applications where fault current is stiff.
The 3VA series is the successor to the older 3VL family. If you're replacing a 3VL frame, the mounting footprint and bus-bar centers differ — verify panel cutout dimensions against the 86 mm depth, 140 mm width, and 181 mm height of this unit before ordering.
Physical integration
Dimensions: 86 mm deep, 140 mm wide, 181 mm tall (3.39 x 5.51 x 7.13 in). The 7.7 W maximum power loss is modest; no forced cooling needed in a typical enclosure, but account for it in the thermal budget if grouping several breakers. The unit ships without an undervoltage release or shunt trip — those are optional accessories. No voltage-trip or ground-fault monitoring module is factory-installed. The trip indicator is not present on this variant, so you won't get a local mechanical flag for trip cause.