Mersen STPT2-40K150V-2PM Type 2 surge protection device with 40 kA maximum discharge current, 150 V AC Uc, 120 V AC 1Ph+N 2+0 TNS configuration, remote indication and pluggable DIN rail mounting.
Original price was: £86.75.£64.11Current price is: £64.11.
The Mersen 83020121 is a premium Type 2 surge protection device (SPD) designed to protect low voltage electrical installations from transient overvoltages caused by switching operations, utility disturbances and indirect lightning strikes. As part of the trusted Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for commercial, industrial and automation applications.
The STPT2-40K150V-2PM is designed for 120 V AC single phase TNS (1Ph+N) electrical systems and provides 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, while the integrated remote indication contact enables continuous monitoring of the device status from a control system or alarm circuit.
With a 150 V AC maximum continuous operating voltage (Uc), compact 2 pole, 2 module pluggable construction and DIN rail mounting, the Mersen 83020121 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, helping minimise equipment failures, reduce maintenance costs and improve the reliability of low voltage electrical systems.
The Mersen Surge-Trap® STPT2 Series combines high surge current capability with replaceable pluggable cartridges and integrated remote monitoring, making it an ideal solution for electrical distribution panels, industrial control systems and commercial installations.
| Voltage | 120 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40 kA |
| Model | STPT2-40K150V-2PM |
| SKU | 83020121 |
| Product type | Type 2 Surge Protection Device |
| SPD class | Type 2 / Class II |
| Nominal operating voltage | 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 | Yes |
| 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 single phase low voltage TNS electrical installations against transient overvoltages caused by switching operations and indirect lightning strikes.
The Mersen 83020121 is a Type 2 / Class II surge protection device with a pluggable module and remote indication.
It provides coordinated protection across the line and neutral conductors in single phase TNS electrical systems.
Yes. The integrated remote indication contact allows the operational status of the surge protection device to be monitored remotely.
Yes. The pluggable cartridge design enables rapid replacement without removing the complete surge protection assembly.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals to provide dependable protection for critical low voltage electrical systems.
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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...