The Schneider Electric A9N26645 is a Vigi xC60 add-on residual current device (RCD) block from the Acti9 range. It clips onto the outgoing side of a compatible MCB or RCBO to add earth-leakage protection where the main breaker lacks it. Rated 63 A continuous, with 300 mA sensitivity and Type AC waveform detection — meaning it trips on sinusoidal AC fault currents, not pulsed or DC components. That makes it a straight choice for general-purpose circuits feeding resistive or lightly inductive loads like heaters, lighting, or small motor starters in a panel.
Clip-on mounting on standard DIN rail (35 mm). The 4P block takes up 7 modules of 9 mm pitch — that is 135 mm of rail width. Bottom tunnel terminals accept 1...35 mm² rigid or 1...25 mm² flexible conductors, stripped 14 mm, torqued to 3.5 N·m. The electrical connection to the upstream MCB is via screws, so the assembly stays solid under the vibration you get in a crusher control panel or a conveyor MCC.
Rated for the line
Insulation voltage 500 V AC, impulse withstand 6 kV. Pollution degree 3 — the standard for industrial enclosures where conductive dust or condensation can occur. The electromechanical tripping is voltage-independent, so it clears a fault even if the neutral is lost upstream. Instantaneous trip, no intentional delay. The red indicator on the front face shows a trip condition at a glance — useful when you are troubleshooting a nuisance trip on a mill feed conveyor.