Why Choose the Mersen 44120404 K1-4P275 Surge Protection Device?
The Mersen 44120404 K1-4P275 is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect three-phase low-voltage electrical installations against lightning currents and transient overvoltages. As part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable surge protector delivers reliable first-level protection for industrial, commercial and infrastructure applications requiring dependable power quality and system availability.
Designed for installation within the main distribution board, the K1-4P275 combines a compact DIN rail mounted design with a high surge current capacity. Its pluggable construction enables rapid replacement of protection modules during maintenance, reducing downtime whilst maintaining continuous protection of valuable electrical equipment.
With 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 is specifically designed for TNS 230/400 V AC three-phase electrical systems, providing dependable protection against lightning strikes and switching transients.
Key Advantages
- Reliable Type 1+2 surge protection for three-phase electrical installations.
- 4+0 internal configuration designed for TNS systems.
- Pluggable cartridge design enables rapid servicing and replacement.
- Suitable for 230/400 V AC three-phase networks.
- Compact DIN rail mounted construction saves enclosure space.
- Protects switchgear, PLCs, drives and sensitive electronic equipment against 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.
- Green (OK) / Not Green (Replace) visual status indication.
- Compact pluggable DIN rail mounted construction.
Reliable Protection Against Electrical Surges
The Mersen K1-4P275 safely diverts damaging lightning currents and transient overvoltages away from connected electrical equipment before they can affect switchgear, automation systems, motor drives, PLCs and other sensitive electronics. This helps minimise downtime, reduce maintenance costs and improve installation reliability.
Its high surge current capability, compact footprint and pluggable modular design make it an excellent choice for industrial facilities, commercial buildings, manufacturing plants and critical infrastructure where dependable surge 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.
