The Schneider Electric A9R31425 is a 4-pole residual current circuit breaker (RCCB) from the Acti9 iID series, rated at 25 A with 30 mA earth-leakage sensitivity. The 30 mA trip threshold covers socket-outlet and general-purpose protection in residential and commercial final circuits.
The 25 A rated current matches a typical 25 A outgoing circuit — think lighting sub-distribution or a mixed socket group. The SI suffix adds immunity to surge-induced spurious trips — important on lines with frequent lightning or switching transients. Voltage-independent tripping means it clears a fault even if the supply neutral is lost. Rated breaking and making capacity is 1500 A (Idm and Im), which is the short-circuit withstand capability of the RCCB itself. In a properly coordinated panel, the upstream MCB or fuse clears the fault; this rating ensures the RCCB survives until that happens. The 6 kV impulse withstand voltage (Uimp) and 8/20 µs 3000 A surge current withstand (per EN/IEC 61008-1) confirm it handles typical lightning-induced surges without damage. Pollution degree 3 means the RCCB is rated for the conductive pollution typical of industrial control panels — no special conformal coating needed for most environments.
Mounting and wiring notes
Neutral is on the left (fixed position). The toggle control provides a clear contact position indicator, and a padlocking device can lock the toggle in the off position for lockout/tagout. At 8 x 9 mm pitches wide (72 mm), it occupies eight modular spaces on the DIN rail — plan the enclosure layout accordingly. Dimensions: 91 mm high, 72 mm wide, 73.5 mm deep.