What it is and what it does
The Siemens SENTRON 3VA2110-8KP36-0AA0 is a 3-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 up to that ceiling. It carries an ETU850 electronic overcurrent release, configurable for line-protection duty, and includes communication capability for integration into a monitored distribution scheme. The interrupting ratings are the headline: 440 kA at 240 V, 330 kA at 415 V and at 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. That puts it in the high-fault tier for industrial mains — think transformer secondaries, large motor control centers, or busway feeds where available fault current runs high.
Fit and panel integration
Footprint is 105 mm wide by 181 mm tall by 86 mm deep — a standard 3-pole MCCB envelope that drops into SENTRON mounting bases or DIN-rail adapters without panel rework. IP40 on the front face means it's protected against solid objects over 1 mm; fine for enclosed switchboards but not for washdown zones. The ETU850 release supports communication (the listing flags a communication function present), so you can pull trip data and status into a BMS or SCADA layer without adding a separate metering module.
Lifecycle and sourcing reality
Lifecycle status is listed as current — this is an active catalog item from Siemens, not a phase-out or NRND line. That means factory support, firmware updates (if applicable), and replacement parts are available through normal Siemens distribution channels.
Key ratings and what they mean for your panel
The 100 A continuous rating holds flat from 40 °C to 70 °C — that's a full thermal plateau, so you don't lose capacity as the panel warms up. Insulation voltage is rated 800 V, which covers 690 V systems with margin. The adjustable release range (minimum 150 A, maximum 1 200 A) suggests the ETU850 can be set for a wide pickup window, though the frame itself is sized for 100 A continuous. Power loss is 7.7 W maximum — low enough that thermal management in a standard enclosure is straightforward, but worth noting if you're packing multiple breakers in a small cabinet.