The Siemens SENTRON 3VA2010-5HN32-0CL0 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. The interrupting capacity is 187 kA at 240 VAC, 121 kA at 415/440 VAC, 75.6 kA at 500 VAC, and 3 kA at 690 VAC — so it handles high-fault scenarios on 480 V or 600 V class systems without cascading upstream.
The 100 A rating and 16 W maximum power loss mean thermal management inside the enclosure is straightforward; no forced cooling is typically required for a single unit at rated load.