The interrupting ratings are substantial: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 6.3 kA at 690 V — so it handles high-fault utility feeds and transformer secondaries without cascading upstream.
Thermal derating and real-world ampacity
Above that, it derates linearly: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C.
Integrated accessories and communication
The ETU850 trip unit supports communication functions — you can pull event logs, set thresholds, and monitor load current over a fieldbus gateway. No undervoltage release or phase-failure detection on this variant; those are separate accessory modules.