The Schneider Electric A9Z73463 is an Acti9 iID residual current circuit breaker (RCCB) — 4 poles, rated 63 A continuous, with 100 mA earth-leakage sensitivity and a selective (time-delayed) trip characteristic. It is designed for AC networks at 380-415 V, 50/60 Hz, and clips onto a DIN rail for panel mounting. The 100 mA sensitivity and selective delay make this unit suitable for downstream feeder protection where coordination with upstream RCDs is required — the delay prevents nuisance tripping on transient leakage or short-duration faults, so only the faulted branch clears. Rated conditional short-circuit current is 10 kA, and the impulse withstand is 3000 A (8/20 µs wave) per EN/IEC 61008-1, so it handles typical industrial fault levels without upstream reinforcement.
Clip-on mounting on DIN rail, 72 mm wide (8 x 9 mm pitches), neutral on the left. Terminals accept double front or back entry up to 35 mm² rigid or 25 mm² flexible; stripping length 14 mm, torque to 3.5 N·m.