NUR Surge Arrestor 1‑Pole 40 kA 420 V AC

Type: Type 2 Surge Arrestor
Poles: 1P (use 4 units for 3-phase systems)

• Nominal Voltage (Uc): 420V AC

• Maximum Discharge Current (Imax): 40kA (8/20μs waveform)

• Nominal Discharge Current (In): 20kA

• Protection Mode: L–N (line-to-neutral); for 3-phase use: 3× L–N + 1× N–PE

• Voltage Protection Level (Up): ≤2.0kV

• Response Time: ≤25ns

• Indicator: Visual status window (green = operational, red = replace)

• Mounting: 35mm DIN rail

• Connection: Screw terminal, suitable for 6–25mm² cable

• Housing Material: Flame-retardant thermoplastic (UL94-V0)

• Ingress Protection: IP20 (indoor installation)

• Operating Temperature: -40°C to +80°C

• Standards Compliance: IEC/EN 61643-11 (Type 2 classification)

• Application: Protects electrical equipment in 3-phase 400/420V AC systems from transient overvoltages caused by lightning and switching events