Mersen K1-1PG Type 1+2 pluggable neutral-to-earth surge protection device with 50 kA lightning impulse current and 100 kA maximum discharge current.
£123.06
The Mersen K1-1PG, product code 44120100, is a high-performance Type 1+2 Surge Protection Device (SPD) specifically designed to provide neutral-to-earth (N-PE) surge protection within low-voltage electrical installations. Part of the trusted Mersen Surge-Trap® K1 Series, it forms the neutral protection component of coordinated Type 1+2 surge protection systems installed at the main distribution board.
The K1-1PG features a 0+1 internal configuration, a maximum continuous operating voltage (Uc) of 255 V and a pluggable cartridge design for simplified maintenance. Designed for TT and TN-S earthing systems, it provides high-capacity protection against lightning currents flowing between neutral and earth.
With an impressive 50 kA lightning impulse current (Iimp 10/350 μs), 100 kA maximum discharge current (Imax 8/20 μs), 50 kA nominal discharge current (In) and a voltage protection level (Up ≤1.5 kV), the K1-1PG delivers dependable protection for modern commercial, industrial and infrastructure electrical installations.
Neutral surge protection devices are designed to safely divert lightning currents and transient overvoltages between the neutral conductor and protective earth. They are typically installed alongside line protection modules to create a coordinated Type 1+2 surge protection system for low-voltage installations.
The Mersen K1-1PG offers exceptionally high neutral discharge capability, making it particularly suitable for TT and TN-S earthing systems where reliable neutral-to-earth surge protection is essential for safeguarding sensitive electrical equipment and maintaining system reliability.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap® K1 |
| Model | K1-1PG |
| Product code | 44120100 |
| EAN | 8435297884095 |
| Product type | Type 1+2 Neutral Surge Protection Device |
| IEC SPD classification | Class I + II |
| UL classification | Type 1 Component Assembly |
| Internal configuration | 0+1 |
| Protection mode | N-PE |
| Network configuration | TT, TN-S |
| Nominal operating voltage | Neutral |
| Maximum continuous operating voltage (Uc) | 255 V |
| Lightning impulse current (Iimp 10/350 μs) | 50 kA |
| Nominal discharge current (In 8/20 μs) | 50 kA |
| Maximum discharge current (Imax 8/20 μs) | 100 kA |
| Voltage protection level (Up) | ≤1.5 kV |
| Mounting | 35 mm DIN rail |
| Module type | Pluggable |
| Status indication | Visual indicator |
| Flammability rating | UL94 V-0 |
| Width | 18 mm |
| Height | 90 mm |
| Depth | 90.4 mm |
| Weight | Approx. 0.14 kg |
| Applicable standard | IEC 61643-11 |
| RoHS compliant | Yes |
It provides dedicated neutral-to-earth (N-PE) surge protection as part of a coordinated Type 1+2 surge protection system installed within the main electrical distribution board.
A 0+1 configuration protects the neutral-to-earth connection and is normally used together with separate line protection modules in TT and TN-S electrical systems.
The K1-1PG is rated for a 50 kA (10/350 μs) lightning impulse current (Iimp), making it suitable for demanding surge protection applications.
Yes. The K1-1PG features a pluggable cartridge that can be replaced without removing the DIN rail base.
The K1-1PG is designed for installation in TT and TN-S earthing systems where dedicated neutral-to-earth surge protection is required.
Mersen Surge-Trap® K1 Series surge protection devices are trusted worldwide by electrical engineers and panel builders for delivering dependable lightning protection and coordinated surge protection in commercial and industrial electrical installations.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...