The Siemens SENTRON 3VA2110-5HN32-0KC0 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.
Interrupting capacity and selectivity
At 415 V it still holds 121 kA, dropping to 75.6 kA at 500 V and 3.7 kA at 690 V. The 100 A frame with those interrupting ratings gives you solid selectivity headroom downstream; you can coordinate with smaller branch breakers without oversizing the main.
Built-in accessories and release options
Power loss is 10 W maximum, so thermal management inside a sealed enclosure is manageable.