The Siemens SENTRON 3VA2110-8HK32-0AA0 is a 3-pole 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 that ceiling. It carries a breaking capacity of 440 kA at 240 V AC, dropping to 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V.
The 100 A continuous rating is flat across 40–70 °C — unusual for an MCCB, where many competitors start derating above 40 °C. That means this breaker holds its full ampacity in a hot panel or near a furnace line without needing a larger frame. The ETU340 electronic trip unit gives adjustable long-time, short-time, and instantaneous protection (not fixed thermal-magnetic), so you can fine-tune the curve to motor inrush or transformer magnetizing current without nuisance trips. The IP40 front protection means it's suited for dry indoor panel environments — not washdown or outdoor without an enclosure. Power loss is 7.7 W max, low enough to avoid forced cooling in most cabinets.