It carries a rated insulation voltage (Ui) of 800 V and delivers a breaking capacity of 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — these numbers tell you the fault levels it can safely interrupt at each voltage, which is the first thing to check against your transformer and upstream breaker coordination study.
The 100 A frame holds that rating across the 40 °C to 50 °C band, then derates to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C (–). Auxiliary contacts are two HQ switches.
Panel fit
The depth of 86 mm means it clears most standard enclosure depths, but check your gland plate clearance if the breaker sits near the door.