The ETU350M electronic trip unit handles phase-failure detection and undervoltage release is integrated.
Current derating and thermal reality
Above that, derate linearly: 240 A at 55 °C, 235 A at 60 °C, 230 A at 65 °C, 225 A at 70 °C. Maximum power loss is 40 W — that's the heat to vent. The enclosure depth of 110 mm, width 138 mm, and height 248 mm fit standard SENTRON 3VA panel cutouts; verify gland-plate clearance for the incoming cables.
