Mersen 44020100 K2-1PG Type 2 surge protection device for neutral-to-earth protection with 255 V AC maximum continuous operating voltage, 50 kA discharge current capability and pluggable DIN-rail design.
£46.46
The Mersen 44020100, also identified as the K2-1PG, is a robust Type 2 surge protection device (SPD) designed specifically to protect the neutral-to-earth (N-PE) conductor in low-voltage electrical installations against transient overvoltages. As part of the proven Mersen Surge-Trap K2 series, it provides reliable secondary surge protection for commercial, industrial and infrastructure applications.
Featuring a compact pluggable design, the K2-1PG allows rapid inspection and replacement of the protection module without removing the complete base from the DIN rail. A built-in visual status indicator clearly shows the operating condition, helping maintenance engineers quickly identify when replacement is required.
With a 255 V AC maximum continuous operating voltage, a 50 kA nominal and maximum discharge current and a voltage protection level of ≤1.5 kV, the Mersen 44020100 offers dependable protection against switching surges and lightning-induced transient voltages. Its compact single-module format makes it ideal for installation in modern electrical distribution boards and switchgear assemblies.
Neutral-to-earth surge protection devices protect electrical installations against transient voltages that can occur between the neutral and protective earth conductors during lightning activity or switching events. These surges can damage sensitive electronic equipment, control systems and electrical infrastructure.
The Mersen Surge-Trap K2 range is engineered for dependable long-term protection, combining high discharge capability, thermal disconnection technology and a replaceable cartridge design to minimise maintenance while maintaining continuous protection for critical electrical systems.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap K2 |
| Model | K2-1PG |
| SKU / Part number | 44020100 |
| Product type | Surge protection device |
| SPD classification | Type 2 / Class II |
| Internal configuration | 0+1 |
| Number of poles | 1 |
| Protection mode | N-PE |
| Maximum continuous operating voltage (Uc) | 255 V AC |
| Nominal operating voltage | Neutral |
| Nominal discharge current (In) | 50 kA |
| Maximum discharge current (Imax) | 50 kA |
| Voltage protection level (Up) | ≤1.5 kV |
| Response time | ≤100 ns |
| Following current | 100 A |
| Short-circuit withstand | 25 kA |
| Network compatibility | TT and TN-S systems |
| Status indication | Green (OK) / Not green (replace) |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| DIN modules | 1 |
| Operating temperature | -40 to +85 °C |
| EAN | 8435297889700 |
The Mersen 44020100 protects the neutral-to-earth conductor in low-voltage electrical installations against transient overvoltages caused by lightning and switching events.
It is a Type 2 / Class II surge protection device designed for N-PE protection in TT and TN-S electrical systems.
The device is rated for a 50 kA nominal discharge current and a 50 kA maximum discharge current.
Yes. The K2-1PG features a pluggable protection module that can be replaced without removing the DIN-rail base.
It is commonly installed in electrical distribution boards and switchgear to provide secondary surge protection within commercial and industrial low-voltage installations.
Mersen Surge-Trap K2 surge protection devices are trusted by electrical engineers, panel builders and industrial maintenance teams to protect critical electrical installations against damaging transient overvoltages.
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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...
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...