The Siemens SENTRON 3VA2010-6HN36-0CH0 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. Breaking capacity hits 242 kA at 240 V, 187 kA at 415/440 V, and 121 kA at 500 V; at 690 V it still holds 3 kA.
The 100 A rating is flat across the temperature range — that's unusual for a compact MCCB and means you don't have to oversize for a warm panel.
Power loss and environmental limits
Maximum power loss is 16 W at rated current — negligible for panel thermal budgeting. The 70 °C operating ceiling matches the derating curve's top end, so the breaker can run in a hot enclosure without losing its 100 A rating.