Mersen 83020157 STPT2-40K440V-4PM Type 2 surge protection device with 40 kA maximum discharge current, 20 kA nominal discharge current, 440 V AC Uc, 230/400 V AC IT and 400/690 V AC TNS operation, 4+0 IT/TNS configuration, four-pole pluggable DIN rail construction and remote indication.
£171.36
The Mersen 83020157 STPT2-40K440V-4PM is a high-performance Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages caused by switching operations and indirect lightning activity. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for industrial, commercial and infrastructure power distribution systems.
This pluggable surge protection device is designed for fast installation, practical maintenance and long-term protection of sensitive electrical equipment. The remote indication feature enables the SPD status to be monitored from external systems, helping maintenance teams identify end-of-life conditions quickly.
With a 40 kA maximum discharge current, 440 V AC maximum continuous operating voltage and 4+0 IT / TNS configuration, the Mersen 83020157 is suitable for 230/400 V AC IT and 400/690 V AC TNS systems. Its four-pole, four-module DIN rail format makes it ideal for distribution boards and industrial control panels.
Type 2 surge protection devices are installed within electrical distribution boards and control panels to limit transient overvoltages before they reach sensitive connected equipment. They help protect automation controls, power supplies, drives, monitoring equipment and industrial electrical infrastructure from damaging voltage spikes.
The Mersen STPT2-40K440V-4PM combines strong surge discharge performance with pluggable construction and remote indication, making it a dependable choice for electrical contractors, panel builders and maintenance engineers working on monitored commercial and industrial installations.
| Voltage | 400 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA |
| Model | STPT2-40K440V-4PM |
| Part number | 83020157 |
| EAN / UPC | 8435297851776 |
| Product type | Type 2 surge protection device |
| SPD type | Type 2 / Class II |
| Maximum discharge current (Imax) | 40 kA |
| Nominal discharge current (In) | 20 kA |
| Waveform | 8/20 μs |
| Maximum continuous operating voltage (Uc) | 440 V AC |
| Supported systems | 230/400 V AC IT, 400/690 V AC TNS |
| Configuration | 4+0 IT / TNS |
| Number of poles | 4 |
| Module width | 4 modules |
| Format | Pluggable |
| Mounting type | DIN rail |
| Remote indication | Yes |
| Response time | 25 ns |
| Back-up fuse | 125 A gG |
| Protection rating | IP20 |
| Replacement plug L-N | SP2-40K440V |
| Weight | approx. 0.45 kg |
| Standards | IEC 61643-11, EN 61643-11, UL 1449 4th Edition |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
The Mersen 83020157 is used to protect low-voltage electrical installations from transient overvoltages caused by switching operations and indirect lightning activity.
It is a Type 2 / Class II surge protection device designed for installation in electrical distribution boards and control panels.
The Mersen 83020157 is suitable for 230/400 V AC IT and 400/690 V AC TNS systems using a 4+0 configuration.
The device has a maximum discharge current of 40 kA with an 8/20 μs surge waveform.
Yes. The STPT2-40K440V-4PM includes remote indication, allowing the SPD status to be monitored from external systems or control equipment.
Mersen Surge-Trap® surge protection devices are trusted by electrical contractors, panel builders and industrial engineers to help protect critical power distribution systems from 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...