The Schneider Electric A9L16678 is an Acti9 iPRD8r modular surge arrester — a Type 2+3 device with four poles (4P), rated 230/400 V AC (±10 %) at 50/60 Hz. It uses MOV technology and clips onto a DIN rail, making it a straightforward fit inside a distribution panel for protecting sensitive downstream equipment against transient overvoltages.
The maximum discharge current (Imax) is 8 kA per mode (L/PE, N/PE) in common mode, with a nominal discharge current (In) of 2.5 kA. That means it handles the typical surge from a nearby lightning strike or utility switching event without failing — the 8 kA figure is the single-event survival limit, while 2.5 kA is the repeated-duty rating you design to. The voltage protection level (Up) stays below 1.5 kV in Type 3 common mode, which is low enough to keep most power-supply and control electronics alive through a surge. It carries a total discharge current (Itotal) rating of 30 kA — that's the sum of all modes under a worst-case combined event, confirming the arrester can dump a lot of energy into the ground path in a single shot.
Clip it onto a DIN rail inside the distribution board. The tunnel-type terminals accept 2.5 to 35 mm² conductors on both the line and load sides, so it handles standard panel wiring without adapters. The remote signalling contact (1 C/O, rated 0.25 A / 250 V AC) lets a PLC or building management system monitor the arrester's status — if the MOV cartridge degrades or blows, the contact changes state, so maintenance knows without opening the panel.
Designed to EN 61643-11 and IEC 61643-11. Enclosure carries IK03 impact protection per IEC 62262. Operating temperature range is -25 to 60 °C, storage -40 to 85 °C, with relative humidity 5 to 90 %.
Current-production part (lifecycle stage: current).