Why Choose the Mersen 44120405 K1-4P275-M Surge Protection Device?
The Mersen 44120405 K1-4P275-M is a premium Type 1+2 Surge Protection Device (SPD) designed to protect three-phase low-voltage electrical installations against lightning currents and transient overvoltages. Part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable SPD combines high surge protection performance with integrated remote signalling, making it an ideal solution for industrial, commercial and critical infrastructure applications.
Designed for installation within the main distribution board, the K1-4P275-M features replaceable pluggable protection modules that simplify maintenance and minimise downtime. The integrated microswitch provides remote status monitoring, allowing maintenance teams to receive indication when the SPD requires replacement without opening the enclosure.
Featuring a 275 V AC maximum continuous operating voltage (Uc), a 4+0 protection configuration and a 12.5 kA lightning impulse current (Iimp), the K1-4P275-M is specifically designed for TNS 230/400 V AC three-phase electrical systems, providing dependable protection against direct lightning strikes and switching surges.
Key Advantages
- High-performance Type 1+2 surge protection for three-phase electrical installations.
- Integrated remote signalling microswitch for continuous device monitoring.
- 4+0 protection configuration designed specifically for TNS systems.
- Pluggable cartridge design enables rapid servicing and replacement.
- Compact DIN rail mounted construction saves enclosure space.
- Protects switchgear, PLCs, drives and sensitive electronic equipment from lightning and transient overvoltages.
Key Features
- Mersen Surge-Trap® K - K1 Series.
- IEC Class I+II / Type 1+2 surge protection device.
- 275 V AC maximum continuous operating voltage (Uc).
- 12.5 kA lightning impulse current (Iimp).
- 20 kA nominal discharge current (In).
- 50 kA maximum discharge current (Imax).
- Four-pole 4+0 protection configuration.
- Integrated remote indication microswitch.
- Green (OK) / Not Green (Replace) visual status indication.
- Compact pluggable DIN rail mounted construction.
Reliable Protection Against Electrical Surges
The Mersen K1-4P275-M safely diverts damaging lightning currents and transient overvoltages away from connected equipment before they can affect switchgear, PLCs, motor drives, automation systems and other sensitive electrical devices. This helps minimise downtime, reduce maintenance costs and improve the reliability of electrical installations.
Its combination of high surge current capability, integrated remote monitoring and replaceable pluggable cartridges makes it particularly suitable for industrial facilities, commercial buildings, utilities and other critical power distribution systems where continuous protection is essential.
Typical Applications
- Main three-phase distribution boards.
- Industrial automation systems.
- Commercial buildings.
- Manufacturing facilities.
- Electrical switchboards.
- Infrastructure projects.
- Water treatment plants.
- TNS 230/400 V AC three-phase electrical systems.
