The Schneider Electric A9CR4263 is an Acti9 REDs residual current circuit breaker (RCCB) with integrated recloser — a 2-pole device rated 63 A at 230 V AC, 50 Hz, with 30 mA earth-leakage sensitivity Type A. Type A earth-leakage protection means it detects both sinusoidal AC residual currents and pulsating DC residual currents — the standard for circuits supplying single-phase electronics, switched-mode power supplies, and appliances with rectifiers. The 30 mA sensitivity covers personnel protection (direct contact) per IEC/EN 61008. The recloser logic is what sets this apart from a standard RCCB: after a fault trip, it waits 10 s, then attempts up to 3 reclose cycles with a 180 s minimum interval between closings. If the insulation fault persists, it stops the restart cycle and signals the fault. If the fault was transient (e.g., lightning surge or temporary leakage), the supply restores automatically — saving a site visit to reset a tripped breaker.
IP20 rated — suitable for dry indoor enclosures only. The toggle control and manual test function (operates above 100 V) let the commissioning engineer verify the trip mechanism without a dedicated test set.
Compliance documentation covers EN 50557 (requirements for automatic reclosing devices for RCCBs).
Key ratings in context
Mechanical durability is 4000 cycles open-close, which for a recloser in a distribution board translates to years of service under normal fault-clearing duty. The insulation fault diagnosis checks every 2 minutes if a fault is detected; the minimum leakage resistance threshold is 16 kΩ when operating and 8 kΩ when non-operating. The device also withstands 8/20 µs surge currents up to 250 A for electromagnetic compatibility.