The Siemens SENTRON 3VA2110-6HL32-0JA0 is a 3-pole molded case circuit breaker rated for 100 A continuous current across the full 40–70 °C ambient range — no derating needed up to that ceiling. Its adjustable thermal-magnetic trip unit covers 150–1200 A, letting you set the instantaneous pickup to match downstream cable or load protection without swapping the breaker body. The interrupting ratings climb to 242 kA at 240 V and hold at 187 kA through 440 V, then step down to 121 kA at 500 V and 3.7 kA at 690 V.
Power loss is 10 W maximum at rated load, so ventilation in a sealed enclosure is not critical, but group derating applies if multiple breakers are ganged side-by-side at full current.