What this MCCB carries and where it fits
The Siemens 3VA2010-6HN36-0AJ0 is a SENTRON molded case circuit breaker rated for 100 A continuous current (Iu) with a 3-pole configuration, built for line-protection duty. The ETU350 electronic trip unit handles the curve — no voltage trigger, no undervoltage release, no ground-fault monitoring, just straight overcurrent protection. At 240 V it interrupts 242 kA, at 415 V it still holds 187 kA, so it's sized for high-fault commercial and light-industrial panels where the available short-circuit current is serious. Dimensions come in at 105 mm wide, 181 mm tall, 86 mm deep — that's a standard 3-pole MCCB footprint for a 100 A frame, so it drops into most existing SENTRON or competitive mounting bases without re-drilling the backplate. IP40 on the front means it's fine inside a dry enclosure; no washdown rating here.
Thermal derating and real-world current
Full 100 A holds from 40 °C up to 50 °C ambient — that covers most ventilated panels. At 55 °C it derates to 96.25 A, at 60 °C to 92.5 A, and at 70 °C (the maximum operating ambient) it's down to 85 A. If your panel runs hot near the top of a crowded cabinet, plan for that 85 A floor at the highest rated ambient. Power loss maxes at 13.5 W — not a big heat contributor, but in a dense row of breakers it adds up. The auxiliary contact version ships with 2 auxiliary switches plus 1 trip alarm switch (HP type), so you get status feedback without adding a separate module.