The Siemens SENTRON 3VA2010-5JQ32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for line-protection duty, sized to carry 100 A continuously across the full ambient range from 40 °C to 70 °C with no derating — that 100 A holds at every temperature step in the spec, so you don't have to recalc for a hot panel. Breaking capacity hits 187 kA at 240 VAC, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3 kA at 690 V.
That 105 mm width is a 4-pole-width footprint on a standard DIN-rail or panel-mount base — it fills a 4-module slot (at roughly 27 mm per pole) in a SENTRON distribution board. Depth of 86 mm means it clears most standard enclosure gland plates and backpanels without needing a spacer. The 100 A rating is flat across the operating range, so no extra ventilation gap required beyond normal IEC 60947-2 clearance.
Breaking capacity: 187 kA at 240 VAC, 121 kA at 415 VAC and 440 VAC, 75.6 kA at 500 VAC, 3 kA at 690 VAC. Poles: 3. Auxiliary switches: 2 HQ. Auxiliary release: shunt trip (STL). Communication function: yes. Power loss: 13.5 W maximum. Operating temperature: -25 °C to 70 °C. Storage temperature: -40 °C to 80 °C.