Why Choose the Mersen K1-2PG275 Type 1+2 Surge Protection Device?
The Mersen K1-2PG275, product code 44120200, is a premium Type 1+2 Surge Protection Device (SPD) designed to protect single-phase TT electrical systems (1Ph+N) against lightning-induced surges and transient overvoltages. As part of the Mersen Surge-Trap® K1 Series, it combines line-to-neutral and neutral-to-earth protection within a compact two-pole, pluggable assembly, making it ideal for installation at the main distribution board.
The K1-2PG275 features a 1+1 protection configuration, a maximum continuous operating voltage (Uc) of 275 V AC, and replaceable protection cartridges for simplified servicing. Engineered for TT earthing systems, it provides dependable protection for sensitive electrical equipment in commercial, industrial and residential installations.
Each protection path offers a 12.5 kA lightning impulse current (Iimp), 50 kA maximum discharge current (Imax), 20 kA nominal discharge current (In), and a voltage protection level (Up ≤1.5 kV), ensuring compliance with IEC 61643-11 and reliable protection against both lightning and switching surges.
Key Advantages
- Combined Type 1 + Type 2 surge protection.
- Designed specifically for TT single-phase (1Ph+N) systems.
- 1+1 protection configuration with coordinated L-N and N-PE protection.
- Pluggable cartridges simplify maintenance.
- 50 kA maximum discharge current (Imax) per protection path.
- Compact DIN rail installation.
Key Features
- Manufacturer: Mersen
- Series: Surge-Trap® K1
- Model: K1-2PG275
- Product code: 44120200
- SPD Type: IEC Class I + II (Type 1+2)
- Configuration: 1+1
- System type: TT (1Ph+N)
- Replaceable protection cartridges.
Complete TT System Surge Protection
The Mersen K1-2PG275 combines both line-to-neutral and neutral-to-earth protection into a coordinated Type 1+2 SPD specifically designed for TT earthing systems. This arrangement safely diverts lightning currents and switching surges before they can damage sensitive electrical equipment or interrupt critical operations.
Its pluggable cartridges enable quick replacement following end-of-life indication, reducing maintenance time while maintaining continuous protection for commercial, industrial and infrastructure electrical installations.
Typical Applications
- Main distribution boards.
- Commercial buildings.
- Industrial facilities.
- Residential electrical installations.
- Solar PV systems.
- EV charging infrastructure.
- Building management systems.
- Telecommunications equipment.
- Critical infrastructure.
