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Mersen Surge Protector Type 2 SPD 2 Pole 230 Volt 20KA TNS
Mersen STPT2-40K275V-2P Type 2 surge protection device with 40 kA maximum discharge current, 275 V AC Uc, 230 V AC 1Ph+N 2+0 TNS configuration and pluggable DIN rail mounting.
This product has been discontinued
A direct replacement is available below.
Replacement product
K2-2P275 Mersen Surge Protector Type 2 SPD 2 Pole 230 Volt 20KA TNS
SKU: 44020202
£51.93 ex VAT
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Why Choose the Mersen 83020122 Surge Protection Device?
The Mersen 83020122 is a compact and reliable Type 2 surge protection device (SPD) designed to protect low voltage electrical installations from transient overvoltages caused by switching operations, grid disturbances and indirect lightning effects. Part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable surge protection for commercial, industrial and automation applications.
The STPT2-40K275V-2P is designed for 230 V AC single phase TNS (1Ph+N) electrical systems and provides a 40 kA maximum discharge current (Imax) with a 20 kA nominal discharge current (In). Its 2+0 TNS configuration helps protect line and neutral conductors against damaging transient overvoltages.
With a 275 V AC maximum continuous operating voltage (Uc), compact 2 pole, 2 module pluggable construction and DIN rail mounting, the Mersen 83020122 is ideal for protecting distribution boards, switchgear, control panels and sensitive electrical equipment in demanding low voltage installations.
Key Advantages
- Compact Type 2 surge protection device for low voltage installations.
- 40 kA maximum discharge current (Imax).
- 20 kA nominal discharge current (In).
- 275 V AC maximum continuous operating voltage (Uc).
- 2+0 TNS configuration for 230 V AC single phase systems.
- Pluggable cartridge design for quick maintenance and replacement.
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).
- 230 V AC nominal operating voltage.
- 275 V AC Uc.
- 1Ph+N, 2+0 TNS configuration.
- 2 pole, 2 module DIN rail mounted design.
Reliable Protection Against Electrical Surges
Type 2 surge protection devices help divert transient overvoltages away from connected electrical equipment, reducing the risk of component damage, nuisance failures and costly downtime. They are commonly installed in distribution boards as part of a coordinated low voltage surge protection strategy.
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.
Typical Applications
- Single phase 230 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 | 230 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 | No | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® Pluggable STPT2 Series - 40 kA | |
| Model | STPT2-40K275V-2P | |
| SKU | 83020122 | |
| Product type | Type 2 Surge Protection Device | |
| SPD class | Type 2 / Class II | |
| Nominal operating voltage | 230 V AC | |
| Maximum continuous operating voltage (Uc) | 275 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 | No | |
| Protection rating | IP20 | |
| Short circuit withstand (ISCCR) | 25 kA | |
| Voltage protection level (Up) | ≤ 1.3 kV | |
| Standards | EN/IEC 61643-11, UL 1449 | |
| Replacement cartridge | SP2-40K275V | |
| HS Code | 85363090 | |
| Country of Manufacture | Spain |
Frequently Asked Questions
What is the Mersen 83020122 used for?
It protects low voltage single phase TNS electrical systems from transient overvoltages caused by switching operations, grid disturbances and indirect lightning effects.
What type of surge protection device is it?
The Mersen 83020122 is a Type 2 / Class II surge protection device with a pluggable module design.
What voltage is this SPD designed for?
It is designed for 230 V AC single phase systems with a 275 V AC maximum continuous operating voltage.
What does the 2+0 TNS configuration mean?
The 2+0 TNS configuration provides surge protection across the line and neutral conductors in single phase TNS electrical systems.
Can the protection cartridge be replaced?
Yes. The pluggable cartridge design enables rapid replacement without replacing 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 protect critical electrical infrastructure against damaging transient overvoltages.
