Why Choose the Mersen 44120304 K1-3P320 Surge Protection Device?
The Mersen 44120304 K1-3P320 is a premium Type 1+2 Surge Protection Device (SPD) engineered to protect three-phase low-voltage electrical installations against lightning strikes and transient overvoltages. As part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable surge protector delivers dependable first-line protection for industrial, commercial and infrastructure applications requiring continuous electrical system reliability.
Designed for installation within the main distribution board, the K1-3P320 combines a compact DIN rail mounted design with high surge handling capability. Its pluggable construction enables quick replacement during maintenance, helping minimise downtime whilst ensuring valuable equipment remains protected from damaging surge events.
With a 320 V AC maximum continuous operating voltage (Uc), 3+0 protection configuration and a 12.5 kA lightning impulse current (Iimp), the K1-3P320 is specifically designed for TNC 277/480 V AC three-phase electrical systems, providing reliable protection against both direct lightning strikes and switching transients.
Key Advantages
- Reliable Type 1+2 surge protection for three-phase electrical installations.
- 320 V AC operating voltage for 277/480 V power distribution systems.
- Pluggable cartridge design enables fast servicing and replacement.
- Designed specifically for TNC network configurations.
- Compact DIN rail mounted housing saves valuable enclosure space.
- Protects critical electrical equipment against lightning and transient overvoltages.
Key Features
- Mersen Surge-Trap® K - K1 Series.
- IEC Class I+II / Type 1+2 surge protection device.
- 320 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).
- 3-pole, 3+0 protection configuration.
- Visual end-of-life status indicator.
- Compact pluggable DIN rail mounted construction.
Reliable Protection Against Electrical Surges
The Mersen K1-3P320 safely diverts high-energy surge currents away from connected electrical equipment before they can damage motors, drives, switchgear and sensitive electronic control systems. This helps minimise downtime, reduce maintenance costs and improve the long-term reliability of electrical installations.
Its high surge current capacity, compact footprint and pluggable construction make it an excellent choice for industrial automation, manufacturing facilities, commercial buildings and critical infrastructure where dependable surge protection is essential.
Typical Applications
- Main three-phase distribution boards.
- Industrial control panels.
- Commercial buildings.
- Manufacturing plants.
- Infrastructure projects.
- Electrical switchboards.
- Data centres.
- 277/480 V three-phase power distribution systems.
