Mersen 83020149 STPT2-40K320V-4PGM Type 2 surge protection device with 40 kA maximum discharge current, 20 kA nominal discharge current, 320 V AC Uc, 277/480 V AC operation, 3+1 TT configuration, four-pole pluggable DIN rail construction and remote indication.
£173.09
The Mersen 83020149 STPT2-40K320V-4PGM is a high-quality Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations from transient overvoltages caused by switching events and indirect lightning activity. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for commercial, industrial and infrastructure power distribution systems.
This pluggable surge arrester is designed for easy installation, fast cartridge replacement and reliable long-term operation. The integrated remote indication feature allows the device status to be monitored from control systems or building management equipment, making it suitable for installations where maintenance visibility and system uptime are important.
With a 40 kA maximum discharge current, 320 V AC maximum continuous operating voltage and 3+1 TT configuration, the Mersen 83020149 is suitable for three-phase plus neutral 277/480 V AC systems. Its four-pole, four-module DIN rail format makes it ideal for electrical 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 industrial automation equipment, power supplies, control circuits, drives, communication systems and electrical infrastructure from damaging voltage spikes.
The Mersen STPT2-40K320V-4PGM combines strong surge discharge capability with a practical pluggable construction and remote indication, making it a dependable choice for panel builders, electrical contractors and maintenance engineers working on monitored commercial and industrial installations.
| Voltage | 480 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA |
| Model | STPT2-40K320V-4PGM |
| Part number | 83020149 |
| 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 |
| Nominal operating voltage | 277 / 480 V AC |
| Maximum continuous operating voltage (Uc) | 320 V AC |
| Electrical system | 3-phase + neutral |
| Configuration | 3+1 TT |
| Number of poles | 4 |
| Module width | 4 modules |
| Format | Pluggable |
| Mounting type | DIN rail |
| Remote indication | Yes |
| Protection rating | IP20 |
| Replacement plug L-N | SP2-40K320V |
| Replacement plug N-PE | SP2-40K-N |
| Standards | IEC 61643-11, EN 61643-11, UL 1449 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
The Mersen 83020149 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 distribution boards and electrical control panels.
The device has a maximum discharge current of 40 kA with an 8/20 μs surge waveform.
The Mersen 83020149 is suitable for 277/480 V AC three-phase plus neutral TT systems using a 3+1 configuration.
Yes. The STPT2-40K320V-4PGM 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...
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...