D-curve means it tolerates the inrush of motorized loads — pumps, compressors, small conveyors — without nuisance tripping on start-up.
The D characteristic (10–20× In magnetic trip) is the key selection parameter here — it defers the instantaneous trip to roughly 100–200 A for this 10 A unit, which is what lets it ride through the starting surge of a motor or a bank of fluorescent ballasts.
Panel integration
Snap-on mounting to standard DIN rail. The 1+N module width (roughly 2 modules) fits a standard distribution board cutout. Termination accepts copper conductors up to the rated cross-section typical for 10 A final circuits.