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K2-1P320 Mersen Surge Protector Type 2 SPD 1 Pole 277 Volt 20KA L-N

K2-1P320 Mersen Surge Protector Type 2 SPD 1 Pole 277 Volt 20KA L-N

Mersen K2-1P320 Type 2 surge protection device with 320 V AC operating voltage, 50 kA maximum discharge current and pluggable DIN rail mounting for 277 V AC single-phase electrical systems.

SKU: 44020106Alt SKU: K2-1P320MPN: 44020106
Price
List Price £38.54 ex VAT
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Manufacturer Lead Time

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Why Choose the Mersen 44020106 K2-1P320 Surge Protection Device?

The Mersen 44020106 K2-1P320 is a high-performance Type 2 Surge Protection Device (SPD) designed to protect single-phase low-voltage electrical installations against transient overvoltages caused by switching operations and indirect lightning strikes. Part of the proven Mersen Surge-Trap® K - K2 Series, this pluggable SPD delivers dependable second-stage surge protection for commercial, industrial and infrastructure applications.

Designed for installation within distribution boards, the K2-1P320 features a compact DIN rail mounted housing with replaceable pluggable protection cartridges. This modular construction enables quick maintenance while reducing downtime and maintaining continuous protection for connected electrical equipment.

With a 320 V AC maximum continuous operating voltage (Uc), a 50 kA maximum discharge current (Imax) and a 20 kA nominal discharge current (In), the K2-1P320 is specifically designed for 277 V AC single-phase TNS, TNC and TT (L-N only) electrical systems.

Key Advantages

  • Reliable Type 2 surge protection for single-phase electrical installations.
  • Designed for 277 V AC electrical networks.
  • High 50 kA maximum discharge current (Imax).
  • Pluggable cartridge design enables quick servicing and replacement.
  • Compact DIN rail mounted construction saves valuable enclosure space.
  • Protects sensitive electrical equipment against transient overvoltages and switching surges.

Key Features

  • Mersen Surge-Trap® K - K2 Series.
  • IEC Class II / Type 2 surge protection device.
  • 320 V AC maximum continuous operating voltage (Uc).
  • 20 kA nominal discharge current (In).
  • 50 kA maximum discharge current (Imax).
  • Single-pole (1+0) protection configuration.
  • Green (OK) / Not Green (Replace) visual status indication.
  • Pluggable modular cartridge.
  • DIN rail mounted.

Reliable Protection Against Transient Overvoltages

The Mersen K2-1P320 safely diverts damaging transient surge currents away from connected equipment before they can affect switchgear, PLCs, drives, building management systems and other sensitive electronic devices. This helps reduce maintenance costs, minimise downtime and improve overall installation reliability.

Its combination of high discharge capacity, compact dimensions and pluggable construction makes it an ideal solution for industrial control panels, commercial distribution boards and electrical installations requiring dependable secondary surge protection.

Typical Applications

  • Single-phase distribution boards.
  • Industrial control panels.
  • Commercial electrical installations.
  • Building management systems.
  • Automation equipment.
  • Sensitive electronic equipment.
  • Switchgear assemblies.
  • 277 V AC TNS, TNC and TT (L-N only) electrical systems.

Technical Specifications

SPD Type Type 2
Voltage 277 V
Phase Single Phase
Manufacturer Mersen
Series Surge-Trap® K - K2 Series
Model K2-1P320
Part Number 44020106
EAN 8435297889656
Product type Type 2 Surge Protection Device (SPD)
IEC SPD Type Class II
UL SPD Type Type 1 Component Assembly
Maximum continuous operating voltage (Uc) 320 V AC
Nominal operating voltage (Un) 277 V AC
Maximum discharge current (Imax) 50 kA (8/20 μs)
Nominal Discharge Current (In) 20 kA (8/20 μs)
Protection level (Up) ≤1.5 kV
Configuration TN-S, TN-C, TT
Network compatibility TNS, TNC, TT (L-N only)
Maximum back-up fuse 315 A gG
Rated short-circuit withstand (ISCCR) 25 kA
Residual current (Ipe) <1 mA
Response time ≤25 ns
Dynamic thermal disconnection Yes
Mounting type DIN rail
Format Pluggable
Protection rating IP20
Operating temperature -40°C to +80°C
Housing material PA6 CT1 & PA66 CT1
Dimensions (H × W × D) Approx. 90 × 18 × 74.4 mm
Weight Approx. 0.125 kg
RoHS compliant Yes
HS Code 85363090
Country of Manufacture Spain
Device Type Surge protection device
Earthing System TN-C, TN-S, TT
Nominal Discharge Current (In) 20 kA
Remote Signal No

Frequently Asked Questions

What is the Mersen 44020106 K2-1P320 used for?

It provides Type 2 surge protection for single-phase electrical installations against transient overvoltages caused by switching events and indirect lightning activity.

Which electrical systems is this SPD suitable for?

The K2-1P320 is designed for 277 V AC TNS, TNC and TT (L-N only) electrical systems.

What discharge current ratings does the device provide?

The device provides a 20 kA nominal discharge current (In) and a 50 kA maximum discharge current (Imax).

Does this model include remote signalling?

No. The K2-1P320 features a visual status indicator only. For remote signalling functionality, choose the K2-1P320-M model.

How is the K2-1P320 installed?

The surge protection device mounts directly onto a standard DIN rail and features a replaceable pluggable cartridge for fast servicing and maintenance.

Trusted Protection for Modern Electrical Installations

Mersen Surge-Trap® K Series surge protection devices are trusted by electricians, panel builders and electrical engineers worldwide to protect low-voltage electrical systems from damaging transient overvoltages.

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