The ETU550 electronic trip unit gives you adjustable time-current curves — tr min 0.5 s, tr max 25 s, tsd max 0.5 s — so you can dial in selectivity with downstream breakers without swapping hardware.
Breaking capacity and voltage class
The interrupting ratings tell you where this MCCB fits in the fault-current hierarchy: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. At 690 V the capacity drops sharply — that 3 kA figure means it is not a primary choice for 690 V distribution unless the available fault current is known to be low.
Thermal performance across temperature
Maximum power loss is 2.2 W, which is negligible for panel heat budgeting.