The Schneider Electric A9N16203 is an Acti9 xID residual current circuit breaker (RCCB) — a 2-pole, Type AC device rated for 25 A continuous load and 100 mA earth-leakage sensitivity.
The 100 mA sensitivity (Type AC) means it trips on sinusoidal AC fault currents only — suitable for general-purpose circuits where non-sinusoidal or pulsating DC leakage is not expected. The tunnel-type terminals accept up to 35 mm² rigid or 25 mm² flexible cable; stripping length is 14 mm, and tightening torque is 3.5 N·m. The 18 mm phase-to-phase pitch matches the Acti9 busbar system. Mechanical and electrical durability are both rated at 4000 cycles. The toggle provides local ON, OFF, and fault-trip indication, and a padlocking device is available for lockout/tagout.