Its LI protective function means it provides instantaneous short-circuit protection (Ii = 10 x In) plus fixed thermal overload protection (Ir = 80 A, not adjustable). Breaking capacity class N delivers 53 kA at 240 V AC and 7.5 kA at 415 V AC — enough for most commercial and light industrial panelboards where fault current stays under those thresholds.
Thermal performance and derating
Above that, derating kicks in: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C.
Integration and connections
Main circuit connects via box terminals on the front face, accepting solid or stranded copper. Use inside a panel, not exposed to washdown.
