The breaking capacity reaches 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V — figures that govern selectivity coordination in high-fault-current industrial distribution.
Above that it derates linearly: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. The maximum power loss is 75 W.
Release and accessory configuration
The overcurrent release is the ETU350M, an electronic trip unit with LSI protection curves (long-time, short-time, instantaneous) and phase failure detection.