MCCB with ETU850 trip unit — 250 A frame, 3-pole
Current derating and thermal limits
Above that, derating is linear: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C — the maximum operating temperature.
Auxiliary contacts and communication
The ETU850 has a communication function onboard.
Dimensions are 181 mm height, 105 mm width, 86 mm depth.
