Line protection breaker for high-fault panels
Its interrupting capacity reaches 220 kA at 240 V AC, 154 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V — figures that place it in the high-interrupting class for line protection applications where fault currents are severe. The 250 A rating holds flat from 40 °C through 50 °C, then derates to 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C.
Integration dimensions
The breaker measures 140 mm wide, 158 mm high, and 70 mm deep — a 4-pole footprint that fits standard SENTRON 3VA panel cutouts. The 70 mm depth keeps it within typical 200 mm deep enclosures, leaving room for rear busbar connections or cable ducting.