What it is and what it does
The Siemens 3VA2010-8HN36-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to the maximum operating temperature. It carries a 3-pole design with an ETU350 electronic trip unit, purpose-built for line protection. The interrupting capacity hits 440 kA at 240 VAC, 330 kA at 415 VAC and 440 VAC, 220 kA at 500 VAC, and 52.5 kA at 690 VAC — so it handles high-fault scenarios downstream of large transformers or in industrial mains distribution. Front face carries IP40 protection — sealed against tools and small solids, but not washdown-rated. No undervoltage release, no ground-fault monitoring, no communication function on this variant; it's a straight line-protection breaker with the trip indicator absent.
What fits in the panel
Dimensions are 86 mm deep, 105 mm wide, 181 mm tall — a standard 3-pole MCCB footprint that drops into most Siemens 3VA2 panelboard or enclosure mounting bases without re-drilling. Power loss is 7.7 W maximum at rated current — modest enough that ventilation in a typical IP40 enclosure handles it, but worth checking if you're packing multiple breakers into a sealed stainless cabinet.
Environmental limits
Operating temperature spans -25 °C to 70 °C; storage range goes from -40 °C to 80 °C. The storage limits govern handling and warehousing, not running — don't let it freeze in the truck before install.