Its interrupting capacity reaches 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — the 415 V figure is the one that governs most European industrial panel designs. The breaker holds its full 80 A rating from 40 °C up through 50 °C, then derates gradually to 74 A at 70 °C, which matters when it's packed into a warm enclosure alongside other heat sources.
Interrupting capacity and thermal performance
The interrupting capacity drops with system voltage — from 75.6 kA at 240 V down to 11.9 kA at 500 V and 690 V. That 11.9 kA floor at 690 V still covers most motor branch circuits on 690 V distribution.
The 101.6 mm width (4 inches) occupies two standard 50 mm DIN-rail module spaces, so it fits a 4-pole MCCB footprint common across the SENTRON 3VA family. Rated insulation voltage is 800 V, storage range from -40 °C to 80 °C, operating range from -25 °C to 70 °C.