Breaking capacity reaches 121 kA at 240 V AC and 75.6 kA at 415 V AC, so it handles high-fault utility feeds or transformer-secondaries without cascading upstream. Front protection is IP40, meaning it keeps tools and fingers out but isn't sealed against washdown — panel-mount only, no outdoor exposure.
Above that it derates: 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C.
Panel fit — dimensions and auxiliaries
Footprint is 76.2 mm wide × 130 mm high × 70 mm deep — standard 3-pole MCCB width for a 50 A frame, mounts on a DIN rail or direct panel. The four HQ auxiliary switches (2 NO + 2 NC) are wired at the factory; no add-on kit needed. No communication module either; this is a standalone breaker.