Its 4-pole design with an ETU330 electronic trip unit makes it a line-protection breaker for main feeders or large sub-distribution in industrial panels. The interrupting ratings are the headline: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V — so it handles high-fault scenarios at common low-voltage levels without cascading upstream gear.
The ETU330 electronic trip offers adjustable N-conductor protection (OFF, 50%, or 100% of phase rating), which matters for 4-wire systems where the neutral may carry harmonic currents. Ground-fault monitoring uses summation current on L+N — no external CT needed.
Max power loss is 63.5 W — plan ventilation if you're stacking multiple breakers in a sealed cabinet.