Mersen STPT2-40K440V-1PM Type 2 surge protection device with 40 kA maximum discharge current, 440 V AC Uc, 400 V AC single phase configuration, remote indication and pluggable DIN rail mounting.
£45.49
The Mersen 83020111 is a dependable Type 2 surge protection device (SPD) designed to protect low voltage electrical installations from transient overvoltages caused by switching operations, grid disturbances and indirect lightning effects. Part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides reliable protection for commercial, industrial and automation environments.
Designed for 400 V AC single phase L-N systems, the STPT2-40K440V-1PM delivers a 40 kA maximum discharge current (Imax) and 20 kA nominal discharge current (In). This model also includes remote indication, allowing the operational status of the surge protection device to be monitored from a panel, alarm circuit or control system.
With a 440 V AC maximum continuous operating voltage (Uc), compact 1 pole, 1 module pluggable construction and DIN rail mounting, the Mersen 83020111 is ideal for protecting switchboards, distribution boards, industrial control panels and sensitive electrical equipment.
Type 2 surge protection devices help divert transient overvoltages away from connected equipment, reducing the risk of component damage, nuisance failures and costly downtime. They are commonly used as part of a coordinated protection strategy in low voltage distribution systems.
The Mersen Surge-Trap® STPT2 Series combines high surge handling capability with a compact DIN rail format, replaceable pluggable cartridge and monitoring options, making it a practical solution for demanding electrical installations.
| Voltage | 400 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40 kA |
| Model | STPT2-40K440V-1PM |
| SKU | 83020111 |
| 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 |
| Remote indication | Yes |
| 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 is used to protect low voltage electrical systems from transient overvoltages caused by switching operations, grid disturbances and indirect lightning effects.
The Mersen 83020111 is a Type 2 / Class II surge protection device with a pluggable module and remote indication.
It is designed for 400 V AC single phase L-N systems with a 440 V AC maximum continuous operating voltage.
Yes. The integrated remote indication contact allows the status of the surge protection device to be monitored remotely.
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...