Breaking capacity and trip curve for panel fit
The 5SJ3110-6RC: In a typical commercial or light-industrial distribution board fed by a transformer under 100 kVA, 4.5 kA is adequate for most sub-circuits — but verify the prospective short-circuit current at the installation point. The B-curve means magnetic trip occurs at 30–50 A instantaneous, so it avoids nuisance trips on cable charging currents but clears fast on a hard short.