It's rated 100 A continuous at 40 °C — no derating needed until you push past 55 °C, where it drops to 98 A, then 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. That means in a warm panel you still get nearly full rated current; only above 55 °C do you start losing headroom. Interrupting capacity is the headline here: 187 kA at 240 V AC, 121 kA at 415 V, 76 kA at 440 V, and 17 kA at 500 V. That's a lot of fault-clearing muscle — it'll handle high available fault currents downstream of a large transformer without a cascading failure upstream.
Dimensions are 130 mm tall, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint. If you need aux contacts or remote trip, you'll add them externally.