It protects downstream wiring and loads against overcurrent and short-circuit faults in a 230/400 VAC installation.
At 10 A, this breaker is sized for lighting circuits, small fan loads, or control transformer primaries — not for motor branch circuits where a higher thermal-magnetic curve (C or D) would be needed to handle inrush. The DIN-rail footprint means it occupies a single module width in the panel, so swapping into an existing S260 cutout is a direct mechanical fit.
