The Schneider Electric A9TYBE640 is an Acti9 Active VigiARC iC40 add-on block that combines arc-fault detection (AFDD) with residual current protection (RCD) in a single 1P+N unit rated 40 A at 230 V AC, 50 Hz. The 30 mA earth-leakage sensitivity (Type A-SI, Super Immunised) means it handles nuisance-tripping from inverter-fed or switched-mode loads while still protecting against sinusoidal and pulsating DC fault currents — a common pain point on mixed-load final circuits.
Rated 40 A continuous, 230 V AC phase-to-neutral, 50 Hz only. The 275 V ±5 V overvoltage trip threshold protects against sustained swells. Accuracy on the metering side: voltage ±2 %, current ±2 %, power ±5 %. That is fine for energy monitoring and fault logging but not for revenue-grade billing — the built-in measurement is for diagnostics, not sub-metering. Electrical durability: 10 000 cycles above 25 A, 20 000 cycles at or below 25 A. Mechanical durability 20 000 cycles. For a final-circuit device switched infrequently (once a week or less), this is adequate; for a daily-switched load like a lighting contactor, the mechanical life is the limit.
Mounts on DIN rail via clip-on; neutral on the left (1P+N configuration). Tunnel terminals accept 1–10 mm² flexible or 1–16 mm² rigid copper. Compatible with EcoStruxure Panel Server (Entry, Advanced, Universal) for remote monitoring of arc-fault events, leakage current, and power data. The local signalling includes ON/OFF/fault-trip LED and an arc-fault diagnostic LED — useful for a quick visual check without a meter. Tropicalisation severity B per IEC 60068-2-30 for 28 days — the block handles high-humidity storage and operation in non-condensing conditions, typical for coastal or unconditioned plant rooms.