Mersen 44020201 K2-2PG275-M Type 2 two-pole surge protection device with L-N and N-PE protection, a 275 V AC maximum continuous operating voltage, remote signalling microswitch and 50 kA maximum discharge current.
£89.10
The Mersen 44020201, also identified as the K2-2PG275-M, is a reliable Type 2 surge protection device (SPD) designed to protect single-phase low-voltage electrical installations against transient overvoltages. As part of the proven Mersen Surge-Trap K2 series, it provides combined line-to-neutral and neutral-to-earth protection for commercial, industrial and infrastructure electrical systems.
This two-pole surge protector features a pluggable construction that allows the protection cartridges to be inspected and replaced without removing the complete DIN-rail base. A visual status indicator provides clear local condition monitoring, while the integrated microswitch enables remote signalling to control panels, building management systems and industrial monitoring equipment.
With a nominal operating voltage of 230 V AC, a maximum continuous operating voltage of 275 V AC between line and neutral, a nominal discharge current of 20 kA and a maximum discharge current of 50 kA, the Mersen 44020201 offers dependable protection against switching transients and lightning-induced surges. Its compact two-module design enables straightforward installation in distribution boards and control cabinets.
Transient overvoltages caused by indirect lightning activity, utility switching and inductive electrical loads can damage PLCs, drives, power supplies, communication equipment and other sensitive electronics. A suitable surge protection device diverts excessive surge energy away from connected equipment, helping reduce breakdowns and unplanned downtime.
The Mersen K2-2PG275-M combines local visual indication with a remote signalling microswitch, making it particularly suitable for installations where protection status must be monitored from a central control system. Its replaceable cartridges also allow maintenance teams to restore protection without replacing the complete device.
| Voltage | 230 V |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap K2 |
| Model | K2-2PG275-M |
| SKU / part number | 44020201 |
| Product type | Surge protection device |
| IEC SPD classification | Class II / Type 2 |
| UL SPD classification | Type 1 component assembly |
| Number of poles | 2 |
| Protection modes | L-N / N-PE |
| System compatibility | TT and TN-S |
| Nominal operating voltage | 230 V AC |
| Maximum continuous operating voltage (L-N) | 275 V AC |
| Maximum continuous operating voltage (N-PE) | 255 V AC |
| Nominal discharge current | 20 kA |
| Maximum discharge current | 50 kA |
| Surge waveform | 8/20 µs |
| Voltage protection level at In (L-N) | ≤1.5 kV |
| Voltage protection level at In (N-PE) | ≤1.5 kV |
| Voltage protection level at In (L-PE) | ≤1.8 kV |
| Following current | 100 A |
| Short-circuit withstand rating | 25 kA |
| Maximum back-up fuse | 315 A gG |
| Status indication | Green OK / not green replace |
| Remote signalling | Integrated microswitch |
| Terminal tightening torque | 3 N m |
| Housing material | PA6 CT1 and PA66 CT1 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | approx. 90 × 36 × 74.4 mm |
| Weight | approx. 0.242 kg |
| EAN / UPC | 8435297889670 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
The Mersen 44020201 protects single-phase low-voltage 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 to provide secondary surge protection in TT and TN-S electrical systems.
Yes. The device includes an integrated microswitch that allows its operating status to be monitored remotely through a control panel or management system.
The K2-2PG275-M has a 20 kA nominal discharge current and a 50 kA maximum discharge current using an 8/20 microsecond surge waveform.
Yes. The pluggable design allows the L-N and N-PE protection cartridges to be replaced without removing the complete DIN-rail base.
Mersen Surge-Trap K2 devices are widely used by electrical engineers, panel builders and maintenance teams to protect critical low-voltage equipment while providing clear local and remote condition monitoring.
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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...