Breaking capacity runs from 330 kA at 240 V down to 52.5 kA at 690 V, so the same frame covers high-fault panels at lower voltages and standard industrial distribution at 400/480 V. Thermal derating is published from 40 °C through 70 °C: the breaker holds its full 160 A up to 50 °C, then steps down to 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. The auxiliary contact package comes as 2 HQ auxiliary switches, and a shunt trip (STL) release is fitted for remote tripping.
Panel integration — dimensions and mounting
Maximum power loss is 75 W, so account for that heat in the enclosure thermal calculation, especially when grouping multiple breakers in a row.
Integrated components — basic switch and auxiliary trip
The breaker ships with a supplied basic switch 3VA2216-7MN32-0AA0 and an integrated auxiliary trip 3VA9688-0BL30. These are the internal switching elements that the ETU350M drives. If you are replacing a failed unit, verify that the replacement carries these same subcomponents — the order code encodes them, so ordering the full 3VA2216-7MN32-0HC0 ensures the correct match.