Mersen STPT2-40K-N Type 2 surge protection device with 40 kA maximum discharge current, neutral N-PE protection, pluggable DIN rail mounting and compact 1 module design.
£45.10
The Mersen 83020112 is a compact Type 2 surge protection device (SPD) designed to protect low voltage electrical installations from transient overvoltages. Part of the Mersen Surge-Trap® Pluggable STPT2 Series, it is specifically designed as a neutral protection module for surge protection assemblies and TT system configurations.
The STPT2-40K-N provides a 40 kA maximum discharge current (Imax) and 20 kA nominal discharge current (In), helping divert damaging surge energy safely away from connected electrical equipment. Its pluggable format allows fast cartridge replacement, simplifying maintenance and reducing downtime after surge events.
With a compact 1 pole, 1 module DIN rail mounting design and reliable neutral protection performance, the Mersen 83020112 is ideal for use in coordinated surge protection systems within distribution boards, control panels and commercial or industrial electrical installations.
Neutral surge protection modules are used within coordinated SPD systems to help manage transient overvoltages between neutral and protective earth. This helps protect downstream equipment from surge damage while supporting safer and more reliable electrical distribution.
The Mersen Surge-Trap® STPT2 Series combines high surge handling capability with a compact pluggable cartridge design, making it a practical solution for electrical distribution boards, control panels and industrial low voltage installations.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40 kA |
| Model | STPT2-40K-N |
| SKU | 83020112 |
| Product type | Type 2 Surge Protection Device |
| SPD class | Type 2 / Class II |
| Protection mode | N-PE |
| Application | Neutral protection |
| Maximum discharge current (Imax) | 40 kA |
| Nominal discharge current (In) | 20 kA |
| Configuration | Neutral module |
| Number of poles | 1 Pole |
| Module width | 1 Module |
| Assembly format | Pluggable |
| Mounting type | DIN rail |
| Protection rating | IP20 |
| Voltage protection level (N-PE) | ≤ 1.5 kV |
| Standards | EN/IEC 61643-11, UL 1449 |
| Replacement cartridge | SP2-40K-N |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It is used as a neutral surge protection module to protect electrical systems against transient overvoltages between neutral and protective earth.
The Mersen 83020112 is a Type 2 / Class II surge protection device with a pluggable module.
The device provides a 40 kA maximum discharge current (Imax) and a 20 kA nominal discharge current (In).
Yes. The STPT2-40K-N is commonly used as a neutral protection module in TT surge protection configurations.
Yes. The pluggable cartridge design allows quick replacement when required without replacing the complete surge protection assembly.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals to protect critical electrical infrastructure 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...