Mersen STPT2-40K150V-2P Type 2 surge protection device with 40 kA maximum discharge current, 150 V AC Uc, 120 V AC 1Ph+N 2+0 TNS configuration and pluggable DIN rail mounting.
£74.78
The Mersen 83020120 is a compact and reliable Type 2 surge protection device (SPD) designed to safeguard low voltage electrical installations from transient overvoltages caused by switching operations, utility disturbances and indirect lightning strikes. As part of the proven Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for commercial, industrial and automation environments.
The STPT2-40K150V-2P is designed for 120 V AC single phase TNS (1Ph+N) electrical systems and delivers a 40 kA maximum discharge current (Imax) together with a 20 kA nominal discharge current (In). Its 2+0 TNS configuration protects both line and neutral conductors, helping safeguard downstream electrical equipment from damaging voltage surges.
With a 150 V AC maximum continuous operating voltage (Uc), compact 2 pole, 2 module pluggable construction and DIN rail mounting, the Mersen 83020120 is ideal for protecting switchboards, distribution panels, industrial control panels and sensitive electronic equipment.
Type 2 surge protection devices divert damaging transient overvoltages away from connected equipment, reducing the likelihood of equipment failure, production downtime and costly repairs. They form an essential part of modern low voltage electrical distribution systems.
The Mersen Surge-Trap® STPT2 Series combines high surge current capability with replaceable pluggable cartridges, offering dependable long term protection and simplified maintenance for industrial and commercial installations.
| Voltage | 120 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40 kA |
| Model | STPT2-40K150V-2P |
| SKU | 83020120 |
| Product type | Type 2 Surge Protection Device |
| SPD class | Type 2 / Class II |
| Nominal operating voltage (Un) | 120 V AC |
| Maximum continuous operating voltage (Uc) | 150 V AC |
| Maximum discharge current (Imax) | 40 kA |
| Nominal discharge current (In) | 20 kA |
| Configuration | 1Ph+N, 2+0 TNS |
| Number of poles | 2 Poles |
| Module width | 2 Modules |
| Assembly format | Pluggable |
| Mounting type | DIN rail |
| Remote indication | No |
| Protection rating | IP20 |
| Short circuit withstand (ISCCR) | 25 kA |
| Voltage protection level (Up) | ≤ 0.9 kV |
| Standards | EN/IEC 61643-11, UL 1449 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It protects low voltage single phase TNS electrical systems from transient overvoltages caused by switching operations and indirect lightning strikes.
The Mersen 83020120 is a Type 2 / Class II surge protection device with a pluggable module design.
It is designed for 120 V AC single phase systems with a 150 V AC maximum continuous operating voltage.
The 2+0 TNS configuration provides surge protection across the line and neutral conductors in single phase TNS electrical systems.
Yes. The pluggable cartridge design enables rapid replacement 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...