Why Choose the Mersen 44020218 K2-2P440 Surge Protection Device?
The Mersen 44020218, also identified as the K2-2P440, is a robust Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages. Part of the proven Mersen Surge-Trap K2 series, it is suitable as a second level of protection in distribution boards and other installations where damaging surges may be generated by lightning activity, utility switching or inductive electrical loads.
The K2-2P440 features a compact, pluggable two-pole construction that enables the protection cartridges to be inspected and replaced without removing the complete DIN-rail base. Its visual status indication displays green when the protection modules are operational and changes when replacement is required, helping maintenance teams identify the device condition quickly.
With a 400 V AC nominal operating voltage, a 440 V AC maximum continuous operating voltage to earth, a 20 kA nominal discharge current and a 50 kA maximum discharge current, the Mersen 44020218 delivers dependable surge protection for commercial and industrial TN-S electrical systems. Its compact two-module format makes it suitable for installation in distribution boards, switchgear assemblies and automation panels.
Key Advantages
- Reliable Type 2 surge protection for 400 V AC electrical systems.
- 50 kA maximum discharge current for robust transient overvoltage protection.
- Pluggable protection cartridges simplify maintenance and replacement.
- Visual status indication enables quick inspection of the device condition.
- Compact two-pole DIN-rail design saves valuable enclosure space.
- Suitable for commercial and industrial TN-S electrical installations.
Key Features
- Mersen Surge-Trap K2 series.
- Type 2 / Class II surge protection device.
- Two-pole configuration.
- 400 V AC nominal operating voltage.
- 440 V AC maximum continuous operating voltage to earth.
- 20 kA nominal discharge current (In).
- 50 kA maximum discharge current (Imax).
- Protection modes: L-PE and N-PE.
- Green operational and replacement-required visual indication.
- Fast metal oxide varistor response.
- Replaceable plug-in protection modules.
- Compact DIN-rail mounting format.
Dependable Surge Protection for 400 V Electrical Systems
Transient overvoltages can enter an electrical installation through the power supply network or be generated internally when motors, contactors, transformers and other inductive loads are switched. These short-duration voltage spikes can damage PLCs, drives, power supplies, communication equipment and other sensitive electronic devices.
The Mersen K2-2P440 diverts excessive surge energy towards earth before it reaches connected equipment. Its high discharge capacity, replaceable protection cartridges and clear visual indication help improve system reliability while simplifying routine maintenance in commercial and industrial installations.
Typical Applications
- 400 V AC distribution boards.
- Industrial switchgear and control panels.
- Commercial electrical installations.
- Motor control centres and automation cabinets.
- PLC, drive and power-supply protection.
- TN-S low-voltage electrical systems.
