Mersen 83020148 STPT2-40K320V-4PG 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 and four-pole pluggable DIN rail construction.
£150.52
The Mersen 83020148 STPT2-40K320V-4PG is a reliable Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations from transient overvoltages caused by switching operations and indirect lightning activity. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable surge protection for commercial, industrial and infrastructure power distribution systems.
This pluggable SPD is engineered for straightforward installation, quick cartridge replacement and long-term protection of critical electrical equipment. Its modular construction helps minimise downtime during maintenance, while its visual indication system makes it easy to identify when replacement is required.
With a 40 kA maximum discharge current, 320 V AC maximum continuous operating voltage and 3+1 TT configuration, the Mersen 83020148 is suitable for three-phase plus neutral 277/480 V AC electrical systems. Its four-pole DIN rail format makes it ideal for installation inside distribution boards and control panels.
Type 2 surge protection devices are installed in distribution boards and electrical panels to limit transient overvoltages before they reach sensitive equipment. They help protect industrial automation systems, control circuits, power supplies, drives, monitoring devices and connected electrical loads from damaging voltage spikes.
The Mersen STPT2-40K320V-4PG combines strong surge handling capability with a practical pluggable construction, making it a dependable choice for contractors, panel builders and maintenance engineers working on commercial and industrial power distribution systems.
| Voltage | 480 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA |
| Model | STPT2-40K320V-4PG |
| Part number | 83020148 |
| 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 |
| Indication system | Visual status indication |
| Protection rating | IP20 |
| Product dimensions (H × W × D) | approx. 90 × 72 × 70 mm |
| Product weight | approx. 0.386 kg |
| Standards | IEC 61643-11, EN 61643-11, UL 1449 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
The Mersen 83020148 is used to protect low-voltage electrical installations from transient overvoltages caused by switching events 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 83020148 is suitable for 277/480 V AC three-phase plus neutral systems using a 3+1 TT configuration.
Yes. The STPT2-40K320V-4PG has a pluggable four-module design, allowing protection cartridges to be replaced quickly during maintenance.
Mersen Surge-Trap® surge protection devices are trusted by electrical contractors, panel builders and industrial engineers to help protect critical power distribution systems 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...