Mersen K1-2P320-M Type 1+2 surge protection device with 320 V AC operating voltage, remote signalling microswitch, 12.5 kA lightning impulse current and pluggable DIN rail design for TNS electrical systems.
£198.04
The Mersen 44120213 K1-2P320-M is a high-performance Type 1+2 Surge Protection Device (SPD) developed to protect low-voltage electrical installations against lightning strikes and transient overvoltages. Part of the reliable Mersen Surge-Trap® K - K1 Series, this pluggable SPD offers outstanding surge protection while incorporating remote signalling for continuous monitoring of device status.
Designed for installation at the main distribution board, the K1-2P320-M combines excellent surge current capability with a compact DIN rail mounted design. Its replaceable pluggable module reduces maintenance time, while the integrated microswitch allows remote monitoring, making it ideal for critical industrial and commercial installations.
With a 320 V AC maximum continuous operating voltage (Uc), 2+0 protection configuration, 12.5 kA lightning impulse current (Iimp) and an integrated remote indication contact, the K1-2P320-M provides dependable first-stage surge protection for TNS 277 V AC electrical systems.
The Mersen K1-2P320-M safely diverts high-energy surge currents away from connected equipment before they can damage sensitive electrical components. This helps minimise costly downtime, extend equipment life and improve the reliability of industrial and commercial electrical installations.
Its combination of high surge capacity, compact pluggable construction and integrated remote monitoring makes it an excellent solution for switchboards, control panels and critical electrical infrastructure requiring dependable surge protection.
| Voltage | 277 V |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap® K - K1 Series |
| Model | K1-2P320-M |
| Part Number | 44120213 |
| Product type | Type 1+2 Surge Protection Device (SPD) |
| IEC SPD Type | Class I+II |
| UL SPD Type | Type 1 Component Assembly |
| Maximum continuous operating voltage (Uc) | 320 V AC |
| Nominal operating voltage (Un) | 277 V AC |
| Lightning impulse current (Iimp) | 12.5 kA |
| Nominal discharge current (In) | 20 kA |
| Maximum discharge current (Imax) | 50 kA |
| Configuration | 2+0 |
| Network compatibility | TNS |
| Protection level (Up) | ≤1.5 kV |
| Mounting type | DIN rail |
| Format | Pluggable |
| Indication | Green (OK) / Not Green (Replace) with microswitch |
| Protection rating | IP20 |
| Dimensions (H × W × D) | Approx. 90 × 36 × 90 mm |
| Weight | Approx. 0.345 kg |
It provides Type 1+2 surge protection for low-voltage electrical installations against lightning strikes and transient overvoltages.
Yes. The K1-2P320-M includes an integrated microswitch that provides remote signalling of the device status.
The device is designed for TNS electrical distribution systems operating at 277 V AC.
The SPD features a 12.5 kA lightning impulse current, 20 kA nominal discharge current and 50 kA maximum discharge current.
The K1-2P320-M is supplied in a pluggable housing for installation onto a standard DIN rail inside an electrical distribution board.
Mersen Surge-Trap® K Series surge protection devices are trusted worldwide by electrical engineers for delivering dependable protection against lightning and transient overvoltages in industrial, commercial and infrastructure electrical systems.
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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...