The interrupting ratings are substantial: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and still 7.5 kA at 690 V.
That's unusual for an MCCB and saves you from oversizing the frame. The 4-pole design handles three-phase plus neutral, and the N-conductor protection is adjustable from OFF up to 160 % of the phase setting, which matters when you're feeding a nonlinear load with triplen harmonics. The ETU850 release gives you LSIG (long-time, short-time, instantaneous, ground-fault) curves programmable via the communication port — this breaker talks to the line side, so a remote PLC or BMS can pull status and event logs without climbing into the panel.