What the 63 A and 100 mA ratings mean for your circuit
The 5SV3446-6: The 100 mA trip threshold is the fault current at which it opens, not the leakage you design to; in practice you keep the installation leakage well below half that to avoid nuisance trips.
The short-circuit current rating is 10 kA, with a let-through current of 7 100 A and an I²t value of 110 000 A²·s.
