Why Choose the Mersen 44120300 K1-3P275 Surge Protection Device?
The Mersen 44120300 K1-3P275 is a robust Type 1+2 Surge Protection Device (SPD) engineered to protect three-phase low-voltage electrical installations from lightning strikes and transient overvoltages. Part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable surge protector provides dependable first-level protection for industrial, commercial and infrastructure applications.
Designed for installation within the main distribution board, the K1-3P275 combines high surge current capability with a compact DIN rail mounted design. Its pluggable construction enables quick replacement during servicing, helping minimise maintenance time while ensuring continuous protection of critical electrical equipment.
With a 275 V AC maximum continuous operating voltage (Uc), 3+0 protection configuration and a 12.5 kA lightning impulse current (Iimp), the K1-3P275 is ideally suited to TNC three-phase 400 V electrical systems requiring reliable surge protection.
Key Advantages
- Reliable Type 1+2 surge protection for three-phase low-voltage installations.
- 275 V AC operating voltage for 400 V TNC electrical systems.
- Pluggable design allows quick servicing and replacement.
- Compact DIN rail mounted construction.
- Designed for TNC three-phase distribution networks.
- Protects valuable electrical equipment against lightning 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.
- Visual end-of-life status indicator.
- Compact pluggable DIN rail mounted housing.
Reliable Protection Against Electrical Surges
The Mersen K1-3P275 safely diverts high-energy surge currents away from connected equipment before they can damage switchgear, drives, motors and sensitive electronic systems. This helps improve installation reliability, reduce maintenance costs and minimise operational downtime.
Its high surge capacity and compact pluggable design make it an excellent choice for industrial control panels, commercial buildings, manufacturing facilities and critical infrastructure where dependable surge protection is essential.
Typical Applications
- Main three-phase distribution boards.
- Industrial control panels.
- Manufacturing plants.
- Commercial buildings.
- Infrastructure projects.
- Electrical switchboards.
- Water treatment facilities.
- Three-phase power distribution systems.
