Mersen 44020209 K2-2PG320-M Type 2 surge protection device with 1+1 configuration, integrated remote signalling, 320 V AC maximum continuous operating voltage and 50 kA maximum discharge current.
£92.20
The Mersen 44020209, also identified as the K2-2PG320-M, is a high-performance Type 2 surge protection device (SPD) designed to protect single-phase low-voltage electrical installations against transient overvoltages. Part of the trusted Mersen Surge-Trap K2 series, it combines line-to-neutral and neutral-to-earth protection with integrated remote indication, making it ideal for commercial, industrial and infrastructure applications.
The K2-2PG320-M features a pluggable protection module that allows rapid inspection and replacement without removing the DIN-rail base. A visual status indicator clearly displays the operational condition, while the integrated microswitch provides remote signalling to building management systems, PLCs and industrial monitoring equipment.
With a 277 V AC nominal operating voltage, 320 V AC maximum continuous operating voltage (L-N), 20 kA nominal discharge current and 50 kA maximum discharge current, the Mersen 44020209 delivers dependable protection against switching transients and lightning-induced surges. Its compact two-module DIN-rail design allows straightforward installation within distribution boards and electrical control panels.
Transient overvoltages generated by indirect lightning strikes, utility switching and inductive loads can damage PLCs, drives, power supplies, communication equipment and other sensitive electronic devices. Installing a suitable surge protection device helps reduce costly equipment failures while improving system reliability.
The Mersen Surge-Trap K2 range combines high surge capacity, rapid response and replaceable cartridges with integrated remote monitoring, allowing maintenance teams to monitor protection status remotely while minimising downtime during servicing.
| Voltage | 277 V |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap K2 |
| Model | K2-2PG320-M |
| SKU / Part number | 44020209 |
| Product type | Surge protection device |
| IEC SPD classification | Type 2 / Class II |
| UL SPD classification | Type 1 Component Assembly |
| Internal configuration | 1+1 |
| Number of poles | 2 |
| Protection modes | L-N / N-PE |
| System compatibility | TT and TN-S |
| Nominal operating voltage | 277 V AC |
| Maximum continuous operating voltage (L-N) | 320 V AC |
| Maximum continuous operating voltage (N-PE) | 255 V AC |
| Nominal discharge current | 20 kA |
| Maximum discharge current | 50 kA |
| Voltage protection level (L-N) | ≤1.5 kV |
| Voltage protection level (L-PE) | ≤1.8 kV |
| Voltage protection level (N-PE) | ≤1.5 kV |
| Following current | 100 A |
| Short-circuit withstand | 25 kA |
| Maximum back-up fuse | 315 A gG |
| 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. 0.232 kg |
| EAN | 8435297889687 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
The Mersen 44020209 protects single-phase 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 TT and TN-S low-voltage electrical systems.
Yes. The K2-2PG320-M includes an integrated microswitch that provides remote signalling for building management and industrial monitoring systems.
The device is rated for a 20 kA nominal discharge current and a 50 kA maximum discharge current using the standard 8/20 µs waveform.
Yes. The pluggable cartridge design allows both protection modules to be replaced 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 safeguard critical electrical installations against 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...
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...