That 100 A holds flat from 40 °C up to 50 °C, then derates to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C — so in a warm panel you still have nearly full ampacity, but above 50 °C you lose about 2 A per 5 °C step. Breaking capacity is the headline: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V. The overcurrent release is an ETU310M electronic trip unit, which gives adjustable thermal and magnetic protection curves — not a fixed thermal-magnetic. That matters for coordination studies: you can shape the trip characteristic to achieve selectivity with downstream breakers.
The 20 000 mechanical endurance cycles (latching) is typical for a fixed-mounted MCCB in this class; it is not a switching device for frequent motor starts.