It is a 3+N-pole unit with a D tripping characteristic and an 8 A current rating — sized for motor or transformer branch circuits where inrush currents exceed the C-curve threshold. The D-curve trips between 10× and 20× rated current, so it holds through the startup surge of inductive loads without nuisance opening.
Deployment Context
Snap-on DIN-rail mounting fits standard 35 mm rail in a distribution board or sub-panel. The 3+N-pole configuration (three protected phases plus a switched neutral) is typical for three-phase final circuits in commercial or light industrial panels.