The Siemens SENTRON 3VA2110-6HN32-0HC0 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. The design is line protection, meaning it's optimized for upstream fault clearing rather than motor or generator protection.
Sizing and selectivity for the panel builder
At 100 A flat-rated through 70 °C, this breaker eliminates the guesswork on panel internal temperature rise — you don't have to knock down the trip setting for a warm enclosure. The 3VA series uses a common frame size across the 100 A to 1600 A range, so the mounting footprint and bus connections are consistent within the family. That makes coordination studies simpler when you're cascading downstream breakers.
The supplied basic switch is 3VA21106HN320AA0. Power loss is rated at 10 W maximum.