Mersen K1-1P275-M Type 1+2 pluggable surge protection device with integrated remote signalling contact for 230 V AC systems.
£96.23
The Mersen K1-1P275-M, product code 44120103, is a premium Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations from lightning-induced surges and transient overvoltages. As part of the Mersen Surge-Trap® K1 Series, it provides both Type 1 and Type 2 protection in a compact, pluggable module with the added benefit of an integrated remote signalling contact for continuous status monitoring.
Designed for single-phase AC systems, the K1-1P275-M features a 1+0 protection configuration, a maximum continuous operating voltage (Uc) of 275 V AC, and a replaceable cartridge for simplified maintenance. The integrated microswitch enables remote indication of the SPD status, making it particularly suitable for monitored industrial and commercial installations.
With a 12.5 kA lightning impulse current (Iimp), 50 kA maximum discharge current (Imax), 20 kA nominal discharge current (In) and a voltage protection level (Up) of ≤1.5 kV, the K1-1P275-M delivers dependable protection for sensitive electrical equipment while complying with IEC 61643-11.
Type 1+2 surge protection devices safely divert damaging transient overvoltages away from sensitive electrical equipment before they can cause insulation breakdown or equipment failure. The K1-1P275-M provides both lightning current protection and switching surge protection in one compact device.
The integrated remote signalling contact enables building management systems (BMS), monitoring equipment or PLCs to receive immediate notification should the protection module require replacement, reducing maintenance time and improving system reliability in critical installations.
| Voltage | 230 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® K1 |
| Model | K1-1P275-M |
| Product code | 44120103 |
| Product type | Type 1+2 Surge Protection Device |
| IEC SPD classification | Class I + II |
| UL classification | Type 1 Component Assembly |
| System configuration | 1+0 (L-N) |
| Nominal voltage (Un) | 230 V AC |
| Maximum continuous operating voltage (Uc) | 275 V AC |
| Lightning impulse current (Iimp 10/350 μs) | 12.5 kA |
| Maximum discharge current (Imax 8/20 μs) | 50 kA |
| Nominal discharge current (In 8/20 μs) | 20 kA |
| Voltage protection level (Up) | ≤1.5 kV |
| Remote indication | Yes (integrated microswitch) |
| Mounting | 35 mm DIN rail |
| Module type | Pluggable |
| Status indication | Visual and remote |
| Flammability rating | UL94 V-0 |
| Width | 18 mm |
| Height | 90 mm |
| Depth | 90.4 mm |
| Weight | Approx. 0.178 kg |
| Applicable standard | IEC 61643-11 |
| RoHS compliant | Yes |
It protects single-phase low-voltage electrical installations against lightning currents and transient overvoltages while providing remote status monitoring.
The K1-1P275-M includes an integrated remote signalling microswitch, allowing the status of the surge protection device to be monitored remotely.
The device is designed for systems with a continuous operating voltage of 275 V AC.
Yes. The K1-1P275-M features a pluggable cartridge that can be replaced without removing the DIN rail base.
It is typically installed in the main distribution board of industrial, commercial and residential electrical installations requiring monitored surge protection.
Mersen Surge-Trap® K1 Series surge protection devices are trusted by electrical engineers, panel builders and contractors for dependable lightning protection, transient overvoltage suppression and reliable remote status monitoring.
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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...