Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V — numbers that give you headroom for high-fault utility feeds or transformer secondaries without cascading upstream.
Trip unit and selectivity
The ETU320 is an electronic release with adjustable long-time pickup (Ir) from 400 A to 1000 A and short-time pickup (Ii) from 1500 A to 10 000 A, plus adjustable long-time delay (tr) from 0.5 s to 17 s. That range lets you coordinate downstream feeders without nuisance trips on motor inrush or capacitor banks — common pain point on fixed-trip breakers.
Physical integration
Dimensions: 320 mm high, 210 mm wide, 120 mm deep. The 3-pole footprint matches standard SENTRON 3VA mounting rails; no special adapter needed for retrofit into existing 3VA or earlier 3VL cutouts.