Mersen 44020203 K2-2P275-M Type 2 surge protection device with integrated remote signalling, 275 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 50 kA maximum discharge current.
£80.32
The Mersen 44020203, also identified as the K2-2P275-M, is a high-performance Type 2 surge protection device (SPD) designed to protect single-phase low-voltage electrical installations against transient overvoltages. As part of the proven Mersen Surge-Trap K2 series, it delivers dependable line-to-neutral surge protection with integrated remote signalling, making it ideal for commercial, industrial and infrastructure electrical systems.
Featuring a pluggable protection module, the K2-2P275-M enables quick inspection and cartridge replacement without removing the DIN-rail base. A built-in visual status indicator clearly shows the operating condition, while the integrated microswitch allows remote monitoring through PLCs, building management systems and industrial automation platforms.
With a 230 V AC nominal operating voltage, a 275 V AC maximum continuous operating voltage, a 20 kA nominal discharge current and a 50 kA maximum discharge current, the Mersen 44020203 provides reliable protection against switching transients and lightning-induced surges. Its compact two-module DIN-rail format makes installation straightforward in distribution boards, switchgear and electrical control panels.
Transient overvoltages generated by indirect lightning strikes, switching operations and inductive electrical loads can damage PLCs, drives, communication equipment, power supplies and other sensitive electronics. Installing a dedicated Type 2 surge protection device helps reduce equipment failures, minimise downtime and improve long-term electrical system reliability.
The Mersen Surge-Trap K2 range combines high surge current capability, rapid response, replaceable protection cartridges and integrated remote monitoring. These features allow maintenance teams to monitor protection status remotely while ensuring valuable electrical equipment remains protected.
| Voltage | 230 V |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap K2 |
| Model | K2-2P275-M |
| SKU / Part number | 44020203 |
| Product type | Surge protection device |
| IEC SPD classification | Type 2 / Class II |
| UL SPD classification | Type 1 Component Assembly |
| Internal configuration | 2+0 |
| Number of poles | 2 |
| System compatibility | TN-S |
| Protection mode | L-PE / N-PE |
| Nominal operating voltage | 230 V AC |
| Maximum continuous operating voltage | 275 V AC |
| Nominal discharge current | 20 kA |
| Maximum discharge current | 50 kA |
| Voltage protection level | ≤1.5 kV |
| Response time | ≤25 ns |
| Maximum back-up fuse | 315 A gG |
| Short-circuit withstand | 25 kA |
| Status indication | Green (OK) / Not green (replace) |
| Remote signalling | Integrated microswitch |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | approx. 90 × 36 × 74.4 mm |
| Weight | approx. 0.23 kg |
| EAN | 8435297889786 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
The Mersen 44020203 protects single-phase TN-S electrical installations and connected equipment against transient overvoltages caused by lightning activity and electrical switching events.
It is a Type 2 / Class II surge protection device designed for secondary surge protection in low-voltage TN-S electrical systems.
Yes. The integrated microswitch provides remote signalling so the operating status can be monitored from building management or industrial control systems.
The K2-2P275-M is rated for a 20 kA nominal discharge current and a 50 kA maximum discharge current using the standard 8/20 µs surge waveform.
Yes. The pluggable cartridge design allows replacement of the protection modules without removing the complete DIN-rail base.
Mersen Surge-Trap K2 surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals to protect critical low-voltage electrical systems from 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...