The Schneider Electric A9Z31480 is an Acti9 iID 4-pole residual current circuit breaker (RCCB) rated at 80 A with 30 mA earth-leakage sensitivity. The trip mechanism is voltage-independent — it draws its operating energy from the fault current itself, so it remains functional even if the neutral is lost upstream.
80 A rated current (In) on a 4P frame means this RCCB can serve as the main residual protection for a sub-distribution board feeding mixed loads up to that current. The 30 mA sensitivity is the standard for personnel protection (shock hazard) per most national wiring rules. Rated conditional short-circuit current (Icn) is 10 kA — the RCCB can withstand a 10 kA fault without damage when backed by an upstream overcurrent device rated for that SCCR. The breaking and making capacity (Idm / Im) is 1500 A, which covers the switching duty for the RCCB itself under fault conditions. Impulse withstand voltage (Uimp) is 6 kV, and the 8/20 µs surge immunity is rated at 3000 A per EN/IEC 61008-1. That means the device survives lightning-induced or switching transients on the mains without internal damage or nuisance trip.
The 4P body takes 8 x 9 mm pitches (72 mm wide), so it occupies eight modular spaces in a distribution board. Neutral is on the left, consistent with the Acti9 busbar layout. IP20 on the body (finger-safe), IP40 inside a modular enclosure. The back terminals are slightly smaller (25 mm² rigid max) — plan the feed direction before terminating.
The Type A-SI classification is defined within those standards. The device carries the CE mark and is accepted across EU and UKCA jurisdictions.