What the C-curve means for your panel
The C-curve trips between 5 and 10 times the rated current (In), so the S201M-C13 will hold steady-state loads up to 13 A and clear short-circuit faults in the 65–130 A range. That characteristic suits it for general-purpose branch circuits feeding resistive and moderate inductive loads — lighting banks, small transformers, control power supplies — where inrush is not extreme. For motor-starting duty or high-inrush loads, a D-curve variant would be the better fit.
This is the same mechanical footprint as every other System pro M compact 1-pole MCB, so it swaps directly into an existing DIN-rail panel without re-drilling or re-wiring the busbar.