Mersen 44020219 K2-2P440-M Type 2 surge protection device with integrated remote signalling, 440 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 50 kA maximum discharge current.
£86.75
The Mersen 44020219, also identified as the K2-2P440-M, is a premium Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations from transient overvoltages. As part of the proven Mersen Surge-Trap K2 series, it provides dependable protection for 400 V TN-S electrical systems while incorporating an integrated remote signalling contact for continuous status monitoring.
The K2-2P440-M features a reinforced pluggable construction that enables the protection cartridge to be replaced without removing the complete DIN-rail base. A clear visual status indicator displays the operational condition locally, while the integrated microswitch provides remote signalling to PLCs, SCADA systems and building management systems, making it ideal for critical commercial and industrial installations.
With a 400 V AC nominal operating voltage, a 440 V AC maximum continuous operating voltage, a 20 kA nominal discharge current and a 50 kA maximum discharge current, the Mersen 44020219 provides reliable protection against lightning-induced surges and switching transients. Its compact two-module DIN-rail design allows straightforward installation within distribution boards, switchgear and industrial control panels.
Transient overvoltages caused by indirect lightning strikes, utility switching and inductive electrical loads can damage PLCs, drives, communication equipment, power supplies and other sensitive electronics. Installing a dedicated Type 2 surge protection device helps reduce costly failures, minimise downtime and improve long-term electrical reliability.
The Mersen K2-2P440-M combines high surge current capability with integrated remote signalling, enabling maintenance personnel to monitor the protection status from a central control system while benefiting from quick replacement of the plug-in protection cartridge whenever servicing is required.
| Voltage | 400 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap K2 |
| Model | K2-2P440-M |
| SKU / Part number | 44020219 |
| Product type | Surge protection device |
| IEC SPD classification | Type 2 / Class II |
| UL SPD classification | Type 1 Component Assembly |
| Configuration | 2+0 |
| Number of poles | 2 |
| Network configuration | TN-S |
| Protection modes | L-PE / N-PE |
| Nominal operating voltage | 400 V AC |
| Maximum continuous operating voltage | 440 V AC |
| Nominal discharge current | 20 kA |
| Maximum discharge current | 50 kA |
| Voltage protection level (L-G) | 1.5 kV |
| Voltage protection level (N-G) | 1.5 kV |
| Voltage protection level (L-N) | 2.5 kV |
| Response time | ≤25 ns |
| Short-circuit withstand rating | 25 kA |
| Maximum back-up fuse | 315 A gG |
| Status indication | Green (OK) / Not green (replace) |
| Remote signalling | Integrated microswitch |
| Protection rating | IP20 |
| Housing material | PA6 CT1 & PA66 CT1 |
| Terminal tightening torque | 3 Nm |
| Mounting type | DIN rail |
| Replacement cartridge | Mersen 44020005 |
| Dimensions (H × W × D) | 90 × 36 × 74.4 mm |
| Weight | approx. 0.223 kg |
| EAN | 8435297889854 |
| RoHS compliant | Yes |
The Mersen 44020219 protects 400 V TN-S electrical installations against transient overvoltages caused by lightning activity, switching events and inductive loads while providing remote status monitoring.
It is a Type 2 / Class II surge protection device designed for secondary surge protection in commercial and industrial low-voltage electrical systems.
Yes. The integrated microswitch enables 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 design allows the protection cartridge to be replaced without removing the complete DIN-rail base. The replacement cartridge is Mersen part number 44020005.
Mersen Surge-Trap K2 surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals to protect critical low-voltage electrical systems while providing reliable long-term surge protection and simplified 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...
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...