Mersen K1-1P275 Type 1+2 pluggable surge protection device for 230 V AC systems with 275 V continuous operating voltage, 12.5 kA lightning impulse current and 50 kA maximum discharge current.
£85.15
The Mersen K1-1P275, product code 44120102, is a premium Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations against transient overvoltages caused by lightning strikes and switching events. Suitable as the first level of protection within a main distribution board, it combines both Type 1 and Type 2 surge protection in a compact, pluggable module.
Designed for single-phase AC systems, the K1-1P275 features a 1+0 protection configuration, a continuous operating voltage (Uc) of 275 V AC, and a replaceable cartridge design for simplified maintenance. Its robust construction and international certifications make it ideal for industrial, commercial and residential installations requiring dependable surge protection.
With an Iimp rating of 12.5 kA (10/350 μs), Imax of 50 kA (8/20 μs), and a low voltage protection level (Up ≤1.5 kV), the Mersen K1-1P275 provides reliable protection for sensitive electrical equipment while ensuring compliance with modern installation standards.
Surge protection devices safeguard electrical installations by diverting damaging transient overvoltages safely to earth before they reach connected equipment. Type 1+2 SPDs are specifically designed to protect against both direct lightning currents and switching surges, making them suitable for installation at the origin of a building's electrical installation.
The Mersen Surge-Trap® K1 Series provides dependable protection for commercial, industrial and residential installations. Its pluggable construction simplifies maintenance, while the high surge capacity helps minimise equipment damage and system downtime following transient overvoltage events.
| Voltage | 230 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Model | K1-1P275 |
| Product code | 44120102 |
| EAN | 8435297888017 |
| Product type | Type 1+2 Surge Protection Device |
| IEC SPD Type | Class I + II |
| UL SPD Type | Type 1 Component Assembly |
| System configuration | 1+0 (L-N) |
| Nominal system 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 |
| Mounting | DIN rail |
| Format | Pluggable |
| Protection indication | Visual indicator |
| Flammability rating | UL94 V-0 |
| Product width | 18 mm |
| Product height | 90 mm |
| Product depth | 90.4 mm |
| Weight | Approx. 0.184 kg |
| RoHS compliant | Yes |
| Applicable standard | IEC 61643-11 |
It protects low-voltage electrical installations from lightning-induced surges and transient overvoltages by combining Type 1 and Type 2 surge protection within a single device.
Type 1+2 devices protect against both direct lightning currents entering the installation and switching-induced transient overvoltages, making them suitable for installation at the main distribution board.
The K1-1P275 is designed for systems with a continuous operating voltage of 275 V AC.
Yes. The K1-1P275 features a pluggable cartridge, allowing quick replacement without removing the complete base from the DIN rail.
It is typically installed within the main low-voltage distribution board of commercial, industrial and residential electrical installations.
Mersen Surge-Trap® surge protection devices are trusted worldwide by electrical engineers, panel builders and contractors for providing reliable protection against lightning and transient overvoltages in critical electrical installations.
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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...