Mersen K1-1P320 Type 1+2 pluggable surge protection device for 277 V AC systems with 320 V continuous operating voltage, 12.5 kA lightning impulse current and 50 kA maximum discharge current.
£91.97
The Mersen K1-1P320, product code 44120106, is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations against lightning-induced surges and transient overvoltages. Part of the Mersen Surge-Trap® K1 Series, it combines Type 1 and Type 2 surge protection in a compact, pluggable module suitable for installation at the main distribution board.
Designed for single-phase AC systems, the K1-1P320 features a 1+0 protection configuration, a maximum continuous operating voltage (Uc) of 320 V AC, and a replaceable cartridge that simplifies maintenance while reducing downtime. The robust design and international certifications make it suitable for industrial, commercial and residential electrical 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 K1-1P320 delivers dependable protection for sensitive electrical equipment against lightning and switching transients.
Type 1+2 surge protection devices divert damaging transient overvoltages safely to earth before they reach connected electrical equipment. They are specifically designed to provide protection against both direct lightning currents and switching-induced surges, making them ideal for installation at the origin of an electrical installation.
The Mersen Surge-Trap® K1 Series is trusted in industrial, commercial and infrastructure projects for dependable surge protection, compact installation and simplified maintenance thanks to its pluggable construction.
| Voltage | 277 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® K1 |
| Model | K1-1P320 |
| Product code | 44120106 |
| EAN | 8435297888024 |
| 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 system voltage (Un) | 277 V AC |
| Maximum continuous operating voltage (Uc) | 320 V AC |
| Lightning impulse current (Iimp 10/350 μs) | 12.5 kA |
| Nominal discharge current (In 8/20 μs) | 20 kA |
| Maximum discharge current (Imax 8/20 μs) | 50 kA |
| Voltage protection level (Up) | ≤1.5 kV |
| Mounting | 35 mm DIN rail |
| Module type | Pluggable |
| Status indication | Visual indicator |
| Flammability rating | UL94 V-0 |
| Width | 18 mm |
| Height | 90 mm |
| Depth | 90.4 mm |
| Weight | Approx. 0.178 kg |
| RoHS compliant | Yes |
| Applicable standard | IEC 61643-11 |
It protects low-voltage electrical installations against lightning currents and transient overvoltages by combining Type 1 and Type 2 surge protection in a single device.
Type 1+2 surge protection devices protect against both direct lightning currents entering the installation and switching-induced transient overvoltages.
The K1-1P320 is designed for systems with a maximum continuous operating voltage of 320 V AC.
Yes. The K1-1P320 features a pluggable cartridge that can be replaced without removing the base from the DIN rail.
It is typically installed in the main distribution board of industrial, commercial and residential electrical installations.
Mersen Surge-Trap® K1 Series surge protection devices are trusted by electrical engineers, contractors and panel builders 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...