Mersen STPT2-40K440V-1P Type 2 surge protection device with 40 kA maximum discharge current, 440 V AC Uc, 400 V AC single phase configuration and pluggable DIN rail mounting.
£38.54
The Mersen 83020110 is a robust Type 2 surge protection device (SPD) engineered to protect low voltage electrical installations from transient overvoltages caused by switching operations and indirect lightning strikes. As part of the trusted Mersen Surge-Trap® Pluggable STPT2 Series, it provides reliable protection for commercial, industrial and automation applications.
Designed for 400 V AC single phase L-N systems, the STPT2-40K440V-1P delivers a 40 kA maximum discharge current (Imax) and 20 kA nominal discharge current (In), helping protect sensitive electrical equipment against damaging voltage surges. Its pluggable construction allows rapid replacement of the protection module, simplifying maintenance and reducing downtime.
With a 440 V AC maximum continuous operating voltage (Uc), compact 1 pole, 1 module DIN rail mounting design and compliance with EN/IEC 61643-11 and UL 1449, the Mersen 83020110 is an excellent choice for protecting electrical distribution systems, switchboards and industrial control panels.
Type 2 surge protection devices divert transient overvoltages away from connected electrical equipment, reducing the risk of damage, unexpected downtime and costly repairs. They provide an essential layer of protection within modern electrical distribution systems.
The Mersen Surge-Trap® STPT2 Series combines high surge handling capability with a replaceable pluggable cartridge, making it an effective solution for industrial control panels, switchboards and commercial electrical installations.
| Voltage | 400 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40 kA |
| Model | STPT2-40K440V-1P |
| SKU | 83020110 |
| Product type | Type 2 Surge Protection Device |
| SPD class | Type 2 / Class II |
| Nominal operating voltage | 400 V AC |
| Maximum continuous operating voltage (Uc) | 440 V AC |
| Maximum discharge current (Imax) | 40 kA |
| Nominal discharge current (In) | 20 kA |
| Configuration | 1 Phase L-N |
| Number of poles | 1 Pole |
| Module width | 1 Module |
| Assembly format | Pluggable |
| Mounting type | DIN rail |
| Protection rating | IP20 |
| Short circuit withstand (ISCCR) | 25 kA |
| Voltage protection level (Up) | ≤ 2 kV |
| Standards | EN/IEC 61643-11, UL 1449 |
| Replacement cartridge | SP2-40K440V |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It protects low voltage electrical systems from transient overvoltages caused by switching operations and indirect lightning strikes.
The Mersen 83020110 is a Type 2 / Class II surge protection device with a pluggable module.
It is designed for 400 V AC single phase L-N systems with a 440 V AC maximum continuous operating voltage.
The device provides a 40 kA maximum discharge current (Imax) and a 20 kA nominal discharge current (In).
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...
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...