The Schneider Electric A9TSB3625 is an Acti9 iARC arc fault detection switch (AFDD) rated at 25 A, 1P+N, 230 V AC 50 Hz, built to IEC 62606. The 25 A rating means it protects a final subcircuit (outgoer) against series and parallel arcing faults that a standard MCB alone cannot detect.
Rated breaking capacity is 500 A (Im = 500 A, Im1 = 500 A) — that is the maximum fault current the device can safely interrupt at 230 V AC. The threshold tripping voltage is 275 V ±5 V, meaning the AFDD detects arc faults when the voltage across the arc exceeds that window; it is designed for a 230 V AC nominal network. Electrical durability is 10,000 cycles at 230 V AC 50 Hz per IEC 62606; mechanical durability is 20,000 cycles. The lower electrical figure reflects contact wear under load — for a switch that may trip under fault, 10,000 operations is well beyond the service life of a typical residential or light commercial final circuit. The toggle control and local signalling (ON, OFF, fault trip LED) give a clear visual indication of the device state and the reason for a trip. Pollution degree 2 per IEC 62606 means the device is rated for normal indoor environments where only non-conductive pollution occurs (occasional condensation).
Neutral is on the left (1P+N configuration). The device includes a padlocking option for lockout/tagout during maintenance.