Surge protection for IT earthing systems
It provides common-mode protection between line and PE, with a maximum discharge current of 65 kA and a nominal discharge current of 20 kA per the EN 61643-11:2012 and IEC 61643-11:2011 standards. The MOV-based pluggable cartridge handles temporary overvoltages up to 337 V L/N for 5 seconds and enters a safe failure mode at 1455 V L/PE for 200 ms, so it won't cascade a fault upstream. Rated operational voltage is 400 V AC (+/- 10%) at 50/60 Hz, and the voltage protection level is clamped below 2.3 kV.
Clip-on mounting to DIN rail — 6 module pitches wide (54 mm), 85 mm tall, 69 mm deep. Tunnel-type terminals accept 2.5 to 25 mm² rigid or 4 to 16 mm² flexible conductors; strip length is 14 mm. The remote signalling contact (1 C/O, rated 0.25 A / 250 V AC) lets a PLC or indicator monitor cartridge status without opening the panel.