Mersen 44020110 K2-1P440 Surge-Trap K2 Type 2 single-pole surge protection device with a 440 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 50 kA maximum discharge current.
£38.54
The Mersen 44020110, also known as the K2-1P440, is a compact and reliable Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages. As part of the advanced Mersen Surge-Trap K2 series, it is suitable for commercial, industrial and infrastructure applications requiring dependable protection for sensitive electrical and electronic equipment.
This single-pole surge protector features a practical pluggable design that simplifies inspection, maintenance and cartridge replacement. Its integrated visual status indicator clearly shows whether the device is operating correctly or requires replacement, helping maintenance teams identify protection status quickly.
With a nominal operating voltage of 400 V AC, a maximum continuous operating voltage of 440 V AC, a nominal discharge current of 20 kA and a maximum discharge current of 50 kA, the Mersen 44020110 provides effective protection against induced voltage surges. Its narrow DIN-rail format allows straightforward installation inside distribution boards, switchgear and electrical control panels.
Transient overvoltages can be generated by indirect lightning activity, utility switching operations and the operation of inductive electrical loads. Although these voltage spikes are extremely brief, they can damage drives, power supplies, controllers, communication equipment and other sensitive electronic components.
The Mersen Surge-Trap K2 series diverts damaging surge currents away from connected equipment. Its high discharge capacity, visual condition indicator and replaceable protection cartridge help improve electrical system reliability while reducing the risk of equipment damage, unexpected downtime and expensive repairs.
| Voltage | 400 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap K2 |
| Model | K2-1P440 |
| SKU / part number | 44020110 |
| Product type | Surge protection device |
| SPD classification | Type 2 / Class II |
| Number of poles | 1 |
| Nominal operating voltage | 400 V AC |
| Maximum continuous operating voltage | 440 V AC |
| Nominal discharge current | 20 kA |
| Maximum discharge current | 50 kA |
| Surge waveform | 8/20 µs |
| Short-circuit withstand rating | 25 kA |
| System compatibility | TN-S, TN-C and TT systems for L-N protection |
| Status indication | Green visual indicator |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal tightening torque | 3 N m |
| Operating temperature | -40 to +85 °C |
| Dimensions (H × W × D) | approx. 74.4 × 18 × 90 mm |
| Weight | approx. 0.096 kg |
| EAN | 8435297889748 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
The Mersen 44020110 protects low-voltage electrical installations and connected equipment against transient overvoltages caused by switching events and indirect lightning activity.
It is a Type 2 / Class II surge protection device designed for use as secondary protection in distribution boards or as primary protection in installations that are not directly exposed to lightning strikes.
The K2-1P440 has a maximum continuous operating voltage of 440 V AC and a nominal operating voltage of 400 V AC.
The device has a nominal discharge current of 20 kA and a maximum discharge current of 50 kA using an 8/20 microsecond surge waveform.
Yes. The Mersen 44020110 has a pluggable cartridge design that allows the protection module to be replaced without removing the complete DIN-rail base assembly.
Mersen Surge-Trap K2 devices are widely used by electrical engineers, panel builders and industrial operators to protect critical electrical equipment against damaging transient overvoltages.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...