The ETU850 release is the key differentiator here: it's a communicating electronic trip unit, so this breaker can report status and trip events over a network — useful for a plant floor where you want remote monitoring of breaker state without walking every panel. The line protection design means the trip curves are shaped for feeder and main breaker duty, not motor starting.
Breaking capacity across voltage — what the numbers mean
Breaking capacity drops as voltage rises: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V (–). That's typical for an MCCB — the arc extinguishes harder at higher voltages. For a 400 V distribution board (common in European industrial plants), the 330 kA figure gives substantial headroom above typical 50–65 kA available fault currents. At 690 V, the 52.5 kA still covers most heavy industrial installations.
Panel integration
The 1.2 W maximum power loss is negligible for panel thermal budgeting.