K1-2P275-M Mersen Surge Protector Type 1+2 SPD 2 Pole 230 Volt 20KA TNS Remote Indication

Why Choose the Mersen 44120205 K1-2P275-M Surge Protection Device?

The Mersen 44120205 K1-2P275-M is a premium Type 1+2 Surge Protection Device (SPD) designed to provide reliable protection against lightning strikes and transient overvoltages in low-voltage electrical installations. As part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable surge protector combines high surge capacity with integrated remote signalling for continuous system monitoring.

Designed for installation at the main distribution board, the K1-2P275-M helps safeguard sensitive electrical equipment from costly damage caused by transient overvoltages. Its compact DIN rail mounted construction and replaceable pluggable module simplify installation and maintenance, making it ideal for demanding industrial and commercial environments.

With a 275 V AC maximum continuous operating voltage (Uc), 2+0 protection configuration, 12.5 kA lightning impulse current (Iimp) and an integrated remote signalling microswitch, the K1-2P275-M provides dependable first-level surge protection for TNS electrical systems.

Key Advantages

• High-performance Type 1+2 surge protection for low-voltage installations.
• Integrated remote signalling microswitch for easy status monitoring.
• Pluggable cartridge design enables fast maintenance and replacement.
• Designed for TNS electrical distribution systems.
• Compact DIN rail mounting saves valuable panel space.
• Protects 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).
• 2-pole, 2+0 protection configuration.
• Integrated remote signalling microswitch.
• Green/Not Green visual status indicator.
• Compact pluggable DIN rail mounted housing.

Technical Specifications

• Manufacturer: Mersen
• Series: Surge-Trap® K - K1 Series
• Model: K1-2P275-M
• Part Number: 44120205
• Product type: Type 1+2 Surge Protection Device (SPD)
• IEC SPD Type: Class I+II
• UL SPD Type: Type 1 Component Assembly
• Maximum continuous operating voltage (Uc): 275 V AC
• Nominal operating voltage (Un): 230 V AC
• Lightning impulse current (Iimp): 12.5 kA
• Nominal discharge current (In): 20 kA
• Maximum discharge current (Imax): 50 kA
• Configuration: 2+0
• Network compatibility: TNS
• Protection level (Up): ≤1.5 kV
• Mounting type: DIN rail
• Format: Pluggable
• Indication: Green (OK) / Not Green (Replace) with microswitch
• Protection rating: IP20
• Dimensions (H × W × D): Approx. 90 × 36 × 90 mm
• Weight: Approx. 0.27 kg

Reliable Protection Against Electrical Surges

The Mersen K1-2P275-M is engineered to divert high-energy surge currents safely to earth before they can damage electrical equipment. This reduces the risk of costly failures, minimises downtime and helps improve the long-term reliability of electrical installations.

Its combination of high surge handling capability, remote monitoring functionality and compact pluggable construction makes it an excellent choice for industrial automation, commercial buildings and critical infrastructure applications.

Typical Applications

• Main low-voltage distribution boards.
• Industrial automation systems.
• Commercial buildings.
• Manufacturing facilities.
• Electrical switchboards.
• Infrastructure projects.
• Building services.
• General power distribution systems.

Trusted Protection for Critical Electrical Systems

Mersen Surge-Trap® K Series surge protection devices are widely specified by electrical engineers and contractors for dependable protection of commercial, industrial and infrastructure electrical installations.