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Mersen Surge Protector Type 2 SPD 2 Pole 120 Volt 20KA TNS Remote Indication
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.
£65.06
Why Choose the Mersen 83020121 Surge Protection Device?
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.
Key Advantages
- Compact Type 2 surge protection device for low voltage installations.
- 40 kA maximum discharge current (Imax).
- 20 kA nominal discharge current (In).
- 150 V AC maximum continuous operating voltage (Uc).
- 2+0 TNS configuration for single phase systems.
- Integrated remote indication for continuous monitoring.
Key Features
- Mersen Surge-Trap® Pluggable STPT2 Series.
- Type 2 / Class II surge protection.
- 40 kA Imax (8/20 μs).
- 20 kA In (8/20 μs).
- 120 V AC nominal operating voltage.
- 150 V AC Uc.
- 1Ph+N, 2+0 TNS configuration.
- Remote indication with pluggable DIN rail mounted design.
Reliable Protection Against Electrical Surges
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.
Typical Applications
- Single phase 120 V TNS electrical systems.
- Commercial distribution boards.
- Industrial control panels.
- PLC and automation systems.
- Building electrical services.
- Low voltage power distribution equipment.
Technical Specifications
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| Voltage | 120 V | |
|---|---|---|
| Phase | Single Phase | |
| Poles | 2-pole | |
| Device Type | Surge protection device | |
| SPD Type | Type 2 | |
| Earthing System | TN-S | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | Yes | |
| 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 | TN-S | |
| 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 |
Frequently Asked Questions
What is the Mersen 83020121 used for?
It protects single phase low voltage TNS electrical installations against transient overvoltages caused by switching operations and indirect lightning strikes.
What type of surge protection device is it?
The Mersen 83020121 is a Type 2 / Class II surge protection device with a pluggable module and remote indication.
What does the 2+0 TNS configuration provide?
It provides coordinated protection across the line and neutral conductors in single phase TNS electrical systems.
Does this model include remote indication?
Yes. The integrated remote indication contact allows the operational status of the surge protection device to be monitored remotely.
Can the protection cartridge be replaced?
Yes. The pluggable cartridge design enables rapid replacement without removing the complete surge protection assembly.
Trusted by Electrical Professionals Worldwide
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.
