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K1-1P320 Mersen Surge Protector Type 1+2 SPD 1 Pole 277 Volt 20KA L-N

K1-1P320 Mersen Surge Protector Type 1+2 SPD 1 Pole 277 Volt 20KA L-N

Mersen K1-1P320 Type 1+2 pluggable surge protection device for 277 V AC systems with 320 V continuous operating voltage, 12.5 kA lightning impulse current and 50 kA maximum discharge current.

SKU: 44120106Alt SKU: K1-1P320MPN: 44120106
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List Price £91.97 ex VAT
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Why Choose the Mersen K1-1P320 Type 1+2 Surge Protection Device?

The Mersen K1-1P320, product code 44120106, is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations against lightning-induced surges and transient overvoltages. Part of the Mersen Surge-Trap® K1 Series, it combines Type 1 and Type 2 surge protection in a compact, pluggable module suitable for installation at the main distribution board.

Designed for single-phase AC systems, the K1-1P320 features a 1+0 protection configuration, a maximum continuous operating voltage (Uc) of 320 V AC, and a replaceable cartridge that simplifies maintenance while reducing downtime. The robust design and international certifications make it suitable for industrial, commercial and residential electrical installations.

With 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) of ≤1.5 kV, the K1-1P320 delivers dependable protection for sensitive electrical equipment against lightning and switching transients.

Key Advantages

  • Combined Type 1 + Type 2 surge protection.
  • Designed for 320 V AC single-phase systems.
  • Pluggable cartridge enables fast maintenance.
  • 12.5 kA lightning impulse current (Iimp).
  • 50 kA maximum discharge current (Imax).
  • Compact DIN rail mounting for modern distribution boards.

Key Features

  • Manufacturer: Mersen
  • Series: Surge-Trap® K1
  • Model: K1-1P320
  • Product code: 44120106
  • SPD Type: IEC Class I + II (Type 1+2)
  • Configuration: 1+0 (L-N)
  • Pluggable module design.
  • Visual operating status indicator.

Reliable Protection Against Transient Overvoltages

Type 1+2 surge protection devices divert damaging transient overvoltages safely to earth before they reach connected electrical equipment. They are specifically designed to provide protection against both direct lightning currents and switching-induced surges, making them ideal for installation at the origin of an electrical installation.

The Mersen Surge-Trap® K1 Series is trusted in industrial, commercial and infrastructure projects for dependable surge protection, compact installation and simplified maintenance thanks to its pluggable construction.

Typical Applications

  • Main electrical distribution boards.
  • Commercial buildings.
  • Industrial facilities.
  • Outdoor LED lighting installations.
  • Solar photovoltaic systems.
  • Battery energy storage systems.
  • EV charging infrastructure.
  • Telecommunications equipment.
  • Water treatment plants.

Technical Specifications

Voltage 277 V
Phase Single Phase
Manufacturer Mersen
Series Surge-Trap® K1
Model K1-1P320
Product code 44120106
EAN 8435297888024
Product type Type 1+2 Surge Protection Device
IEC SPD classification Class I + II
UL classification Type 1 Component Assembly
System configuration TN-S, TN-C, TT
Nominal system voltage (Un) 277 V AC
Maximum continuous operating voltage (Uc) 320 V AC
Lightning impulse current (Iimp 10/350 μs) 12.5 kA
Nominal discharge current (In 8/20 μs) 20 kA
Maximum discharge current (Imax 8/20 μs) 50 kA
Voltage protection level (Up) ≤1.5 kV
Mounting 35 mm DIN rail
Module type Pluggable
Status indication Visual indicator
Flammability rating UL94 V-0
Width 18 mm
Height 90 mm
Depth 90.4 mm
Weight Approx. 0.178 kg
RoHS compliant Yes
Applicable standard IEC 61643-11
Device Type Surge protection device
SPD Type Type 1+2
Earthing System TN-C, TN-S, TT
Nominal Discharge Current (In) 20 kA
Remote Signal No

Frequently Asked Questions

What is the Mersen K1-1P320 used for?

It protects low-voltage electrical installations against lightning currents and transient overvoltages by combining Type 1 and Type 2 surge protection in a single device.

What does Type 1+2 surge protection mean?

Type 1+2 surge protection devices protect against both direct lightning currents entering the installation and switching-induced transient overvoltages.

What is the maximum continuous operating voltage?

The K1-1P320 is designed for systems with a maximum continuous operating voltage of 320 V AC.

Is the surge protection module replaceable?

Yes. The K1-1P320 features a pluggable cartridge that can be replaced without removing the base from the DIN rail.

Where is this SPD typically installed?

It is typically installed in the main distribution board of industrial, commercial and residential electrical installations.

Trusted for Professional Surge Protection

Mersen Surge-Trap® K1 Series surge protection devices are trusted by electrical engineers, contractors and panel builders for providing reliable protection against lightning and transient overvoltages in critical electrical installations.

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