The Schneider Electric A9N16214 is a 2-pole Residual Current Circuit Breaker (RCCB) from the Acti9 xID series, rated 80 A with 300 mA earth-leakage sensitivity. It protects against earth faults in AC circuits at 230-240 V, 50 Hz. The 300 mA trip threshold suits it for general distribution protection rather than personal shock protection — it's sized to catch insulation faults and prevent fire risk on submain or feeder circuits, not for socket-outlet final circuits where 30 mA is the norm.
Neutral on the left. Tunnel terminals accept 1-35 mm² rigid or 1-25 mm² flexible cable; strip 14 mm and torque to 3.5 N.m.
If the downstream load includes electronics with rectifiers, a Type A or Type B RCCB would be needed instead. Rated insulation voltage 500 V AC, operational voltage 230-240 V AC. The 80 A continuous rating and 4000-cycle electrical/mechanical durability are typical for a distribution RCCB in this form factor — it's not a heavy-duty switching device, but a protective device that trips infrequently under fault conditions.