The Schneider Electric A9N19667 is a DPN N Vigi RCBO from the Acti9 range — a combined overcurrent and residual-current device in a single 1P+N module. Rated 25 A at 30 °C with a C-curve magnetic trip (5–10 × In) and 30 mA Type AC earth-leakage protection, it handles final subcircuits in residential and light commercial distribution boards.
That covers standard resistive and inductive loads (heaters, lighting, motors) but not variable-speed drives, UPS outputs, or LED drivers that can generate non-sinusoidal leakage. The C-curve (5–10 × In) holds through moderate inrush from motor-starting or capacitive loads, so it's a general-purpose choice for socket-outlet circuits and small appliances. Rated operational voltage is 230 V AC single-phase, with insulation rated to 400 V AC.
Snaps onto standard DIN rail (mounting support: DIN rail). The toggle switch gives local ON/OFF indication. Relative humidity tolerance 95 % at 55 °C. Altitude limit 2000 m.