The Siemens 3VA2010-5HL32-0DH0 is a SENTRON 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. Three poles, line protection design, with an undervoltage release (UVR) integrated. Interrupting capacity hits 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. That kind of short-circuit rating means it can handle high-fault service-entrance or distribution panels where the available fault current is serious — not every 100 A MCCB carries 187 kA at 240 V.
Dimensions are 181 mm tall, 105 mm wide, 86 mm deep — that's a 3-pole frame that fits standard MCCB mounting patterns in a distribution panel or motor control center. The continuous current rating of 100 A is flat from 40 °C to 70 °C, so you don't have to calculate derating curves for a warm enclosure; it's already baked in.