What this 4-pole MCCB carries — and what it doesn't
It carries 100 A continuously across the full operating temperature range from -25 °C to 70 °C, with no derating needed at 70 °C — that's a flat 100 A curve. The ETU330 electronic trip unit handles the overcurrent release, configurable for N-conductor protection at OFF, 50%, or 100%.
Dimensions are 181 mm high by 140 mm wide by 86 mm deep. Ground-fault monitoring uses summation current formation of L + N conductors. No undervoltage release, no voltage trigger, and no communication function are built in; this is a straight line-protection breaker with the ETU330 doing the intelligent tripping.
For selectivity studies, the ETU330's electronic trip curve gives a wider adjustment range than a thermal-magnetic unit, making downstream coordination easier.