Mersen 44020211 K2-2P320-M Type 2 surge protection device with integrated remote signalling, 320 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 50 kA maximum discharge current.
£86.75
The Mersen 44020211, also identified as the K2-2P320-M, is a premium Type 2 surge protection device (SPD) engineered to protect single-phase low-voltage electrical installations from transient overvoltages. Part of the trusted Mersen Surge-Trap K2 series, it provides reliable protection for 277 V TN-S electrical systems while incorporating an integrated remote signalling contact for continuous status monitoring.
Designed with a pluggable construction, the K2-2P320-M allows protection cartridges to be replaced quickly without removing the complete DIN-rail base. A highly visible mechanical status indicator clearly displays the operating condition, whilst the built-in microswitch enables remote monitoring through PLCs, SCADA systems and building management systems, making it ideal for mission-critical installations.
Featuring a 277 V AC nominal operating voltage, 320 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 50 kA maximum discharge current, the Mersen 44020211 delivers dependable protection against lightning-induced surges and switching transients. Its compact two-module DIN-rail design enables straightforward installation within commercial and industrial electrical distribution systems.
Transient overvoltages caused by indirect lightning strikes, utility switching and inductive electrical loads can damage PLCs, variable speed drives, communication equipment, power supplies and other critical electronics. Installing a dedicated Type 2 SPD significantly reduces the likelihood of equipment damage, production downtime and costly repairs.
The Mersen K2-2P320-M combines high surge handling capability with integrated remote signalling, enabling maintenance personnel to monitor protection status from central control systems whilst benefiting from fast replacement of the pluggable protection module whenever servicing is required.
| Voltage | 277 V |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap K2 |
| Model | K2-2P320-M |
| SKU / Part number | 44020211 |
| Product type | Surge protection device |
| IEC SPD classification | Type 2 / Class II |
| UL SPD classification | Type 1 Component Assembly |
| Internal configuration | 2+0 |
| Number of poles | 2 |
| Network configuration | TN-S |
| Protection modes | L-PE / N-PE |
| Nominal operating voltage | 277 V AC |
| Maximum continuous operating voltage | 320 V AC |
| Nominal discharge current | 20 kA |
| Maximum discharge current | 50 kA |
| Voltage protection level | ≤1.5 kV |
| Response time | ≤25 ns |
| Residual current | <1 mA |
| Short-circuit withstand | 25 kA |
| Maximum back-up fuse | 315 A gG |
| Dynamic thermal disconnection | Yes |
| Status indication | Green (OK) / Not green (replace) |
| Remote signalling | Integrated microswitch |
| Terminal tightening torque | 3 Nm |
| Housing material | PA6 CT1 & PA66 CT1 |
| Mounting type | DIN rail |
| DIN rail modules | 2 |
| Weight | approx. 0.232 kg |
| EAN | 8435297889823 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
The Mersen 44020211 protects 277 V TN-S electrical installations against transient overvoltages caused by lightning activity and switching events while providing remote status monitoring.
It is a Type 2 / Class II surge protection device designed for secondary surge protection in low-voltage TN-S electrical systems.
Yes. It incorporates an integrated microswitch that provides remote signalling to PLCs, SCADA systems and building management 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 surge waveform.
Yes. The pluggable cartridge design allows the protection module to be replaced quickly 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 low-voltage electrical systems against damaging transient overvoltages while simplifying ongoing maintenance.
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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...