The A9N19671: Type AC detection means this RCBO trips on sinusoidal AC earth-leakage currents only — the standard choice for general-purpose distribution circuits feeding resistive, inductive, or electronic loads without DC components or pulsed waveforms. It is not rated for Type A or Type F applications where smoothed DC or mixed-frequency leakage may be present. The 300 mA sensitivity is a fire-protection threshold, not a personnel-protection level (30 mA is typical for that). It suits outgoing sub-distribution circuits feeding fixed equipment where nuisance tripping from cable capacitance or surge suppressors would be a problem. B curve (3...5 x In) means the instantaneous magnetic trip operates between 18 A and 30 A for this 6 A unit. Rated insulation voltage 400 V AC and overvoltage category III confirm it is suitable for fixed-installation distribution boards downstream of the main incoming supply, not for final sub-circuits at the equipment level (category II).
Neutral is on the left, phase on the right, which is the standard Acti9 DPN arrangement. Ambient operating temperature range is -25...60 °C (storage -40...60 °C), with 95% RH at 55 °C. Electrical and mechanical durability are both rated at 20,000 cycles per IEC 61009 — sufficient for distribution switching but not for frequent load-break duty like a contactor. The toggle actuator provides local ON/OFF indication.