Mersen 44020210 K2-2P320 Type 2 surge protection device with 2+0 configuration, 320 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 50 kA maximum discharge current.
£74.78
The Mersen 44020210, also identified as the K2-2P320, is a robust Type 2 surge protection device (SPD) designed to safeguard single-phase low-voltage electrical installations from transient overvoltages. As part of the trusted Mersen Surge-Trap K2 series, it provides reliable surge protection for 277 V TN-S systems, helping protect sensitive electrical equipment against lightning-induced surges and switching transients.
Its compact pluggable design enables rapid inspection and replacement of the protection module without removing the DIN-rail base. An integrated visual status indicator allows maintenance personnel to confirm the operating condition quickly, reducing downtime while maintaining continuous protection.
With a 277 V AC nominal operating voltage, 320 V AC maximum continuous operating voltage, a 20 kA nominal discharge current and a 50 kA maximum discharge current, the Mersen 44020210 delivers dependable protection for commercial buildings, industrial facilities and infrastructure installations requiring high-performance surge suppression.
Electrical transients caused by indirect lightning strikes, switching operations and inductive loads can damage PLCs, drives, power supplies and other critical equipment. Installing a dedicated Type 2 surge protection device significantly reduces the risk of equipment failure and costly downtime.
The Mersen Surge-Trap K2 range combines high discharge capability, fast response and replaceable protection cartridges, making maintenance simple while providing long-term protection for valuable electrical infrastructure.
| Voltage | 277 V |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap K2 |
| Model | K2-2P320 |
| SKU / Part number | 44020210 |
| 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 |
| System compatibility | 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 |
| Protection rating | IP20 |
| Housing material | PA6 CT1 & PA66 CT1 |
| Mounting type | DIN rail |
| DIN rail modules | 2 |
| Weight | approx. 0.205 kg |
| EAN | 8435297889809 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
The Mersen 44020210 protects 277 V TN-S electrical installations against transient overvoltages caused by lightning activity and electrical switching events.
It is a Type 2 / Class II surge protection device designed for secondary surge protection in low-voltage TN-S electrical systems.
The K2-2P320 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 the protection module to be replaced without removing the complete DIN-rail base.
It is commonly installed in commercial distribution boards, industrial control panels, switchgear and automation systems to protect sensitive electrical equipment.
Mersen Surge-Trap K2 surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals worldwide to safeguard critical electrical systems 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...