The Schneider Electric A9N19656 is an Acti9 DPN Vigi earth leakage circuit breaker — a combined MCB and RCD in a single 1P+N module. It carries a Type AC earth-leakage detection circuit, rated at 30 mA sensitivity, with instantaneous tripping. The overcurrent side is a B-curve thermal-magnetic breaker rated at 20 A, with a 6 kA breaking capacity at 230 V AC.
Type AC detection means this unit responds to sinusoidal AC earth-leakage currents only. It is the standard choice for circuits feeding resistive loads, lighting, and general socket outlets where no electronic loads generate pulsed or DC fault currents. The B-curve (magnetic trip between 3 and 5 times In, so 60 to 100 A) suits predominantly resistive or lighting circuits with low inrush; it is not intended for motor or transformer loads where a C or D curve would be needed to avoid nuisance tripping on startup.
The unit is certified to EN/IEC 61009-1 and EN/IEC 61009-2-1, the harmonized standards for residual current operated circuit breakers with integral overcurrent protection. Tropicalisation class 2 per EN 61009 means it withstands 95% relative humidity at 55 °C. Operating altitude is rated to 2000 m without derating.