Why Choose the Mersen 44120301 K1-3P275-M Surge Protection Device?
The Mersen 44120301 K1-3P275-M is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect three-phase low-voltage electrical installations from lightning strikes and transient overvoltages. As part of the proven Mersen Surge-Trap® K - K1 Series, this pluggable SPD combines excellent surge protection with integrated remote signalling, making it ideal for industrial, commercial and critical infrastructure applications.
Designed for installation within the main distribution board, the K1-3P275-M provides reliable first-stage protection against high-energy surge events while helping minimise downtime and equipment damage. Its compact DIN rail mounted design and pluggable construction simplify installation and maintenance, whilst the integrated microswitch enables convenient remote monitoring of device status.
With a 275 V AC maximum continuous operating voltage (Uc), 3+0 protection configuration, 12.5 kA lightning impulse current (Iimp) and an integrated remote indication contact, the K1-3P275-M is ideally suited for TNC 230/400 V AC electrical systems requiring dependable surge protection.
Key Advantages
- Reliable Type 1+2 surge protection for three-phase low-voltage installations.
- Integrated remote signalling microswitch for continuous device monitoring.
- Pluggable cartridge design enables rapid maintenance and replacement.
- Designed specifically for TNC three-phase electrical systems.
- Compact DIN rail mounted housing saves valuable panel space.
- Protects electrical equipment against lightning strikes and switching surges.
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).
- 3-pole, 3+0 protection configuration.
- Integrated remote signalling microswitch.
- Green (OK) / Not Green (Replace) status indication.
- Compact pluggable DIN rail mounted housing.
Reliable Protection Against Electrical Surges
The Mersen K1-3P275-M safely diverts high-energy surge currents away from connected equipment before they can damage drives, switchgear, motors and sensitive electronic systems. This helps reduce maintenance costs, minimise downtime and improve the reliability of electrical installations.
Its high surge handling capability, integrated remote monitoring and compact pluggable construction make it an excellent solution for industrial control panels, manufacturing plants, commercial buildings and infrastructure projects where continuous protection is essential.
Typical Applications
- Main three-phase distribution boards.
- Industrial control panels.
- Manufacturing facilities.
- Commercial buildings.
- Infrastructure projects.
- Electrical switchboards.
- Water treatment plants.
- Three-phase power distribution systems.
