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K1-4PG275-M Mersen Surge Protector Type 1+2 SPD 4 Pole 230/400 Volt 20KA TT Remote Indication

K1-4PG275-M Mersen Surge Protector Type 1+2 SPD 4 Pole 230/400 Volt 20KA TT Remote Indication

Mersen K1-4PG275-M Type 1+2 surge protection device with integrated remote signalling, 275 V AC operating voltage, 3+1 configuration and pluggable DIN rail mounting for TT and TNS three-phase systems.

SKU: 44120401Alt SKU: K1-4PG275-MMPN: 44120401
Price
List Price £383.07 ex VAT
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Manufacturer Lead Time

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Why Choose the Mersen 44120401 K1-4PG275-M Surge Protection Device?

The Mersen 44120401 K1-4PG275-M is a premium Type 1+2 Surge Protection Device (SPD) designed to protect three-phase low-voltage electrical installations against lightning currents and transient overvoltages. As part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable SPD combines high surge protection performance with an integrated remote signalling contact, making it ideal for industrial, commercial and critical infrastructure applications.

Designed for installation within the main distribution board, the K1-4PG275-M features a modular pluggable design that allows rapid cartridge replacement during maintenance, helping to minimise downtime. The integrated microswitch provides remote status monitoring, enabling maintenance teams to receive fault notifications without opening the enclosure.

With a 275 V AC maximum continuous operating voltage (Uc), a 3+1 protection configuration and a 12.5 kA lightning impulse current (Iimp), the K1-4PG275-M is designed for TT and TNS 230/400 V AC three-phase electrical systems, providing dependable protection against direct lightning strikes and switching surges.

Key Advantages

  • High-performance Type 1+2 surge protection for three-phase installations.
  • Integrated remote signalling microswitch for continuous status monitoring.
  • 3+1 protection configuration optimised for TT and TNS systems.
  • Pluggable cartridges enable fast maintenance and replacement.
  • Compact DIN rail mounted housing reduces panel space requirements.
  • Protects sensitive electrical equipment from lightning and transient overvoltages.

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).
  • Four-pole 3+1 protection configuration.
  • Integrated remote indication microswitch.
  • Green (OK) / Not Green (Replace) visual status indication.
  • Compact pluggable DIN rail mounted construction.

Reliable Protection Against Electrical Surges

The Mersen K1-4PG275-M safely diverts damaging surge currents away from connected equipment before they can affect switchgear, PLCs, variable speed drives, building management systems and other sensitive electrical devices. This helps reduce downtime, minimise maintenance costs and improve installation reliability.

Its combination of high lightning current capability, remote monitoring functionality and pluggable construction makes it an excellent choice for industrial plants, commercial buildings, utilities and other critical power distribution installations.

Typical Applications

  • Main three-phase distribution boards.
  • Industrial automation systems.
  • Commercial buildings.
  • Manufacturing facilities.
  • Infrastructure projects.
  • Water treatment plants.
  • Renewable energy installations.
  • TT and TNS three-phase electrical distribution systems.

Technical Specifications

SPD Type Type 1+2
Voltage 400 V
Phase Three Phase
Manufacturer Mersen
Series Surge-Trap® K - K1 Series
Model K1-4PG275-M
Part Number 44120401
EAN 8435297884064
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 (L-N), 255 V AC (N-PE)
Nominal operating voltage (Un) 230/400 V AC
Lightning impulse current (Iimp) 12.5 kA (L-N), 50 kA (N-PE)
Nominal Discharge Current (In) 20 kA (L-N), 50 kA (N-PE)
Maximum discharge current (Imax) 50 kA (L-N), 100 kA (N-PE)
Configuration TN-S, TT
Number of poles 4
System compatibility TN-S, TT
Protection level (Up) ≤1.5 kV
Remote indication Integrated microswitch
Mounting type DIN rail
Format Pluggable
Protection rating IP20
Operating temperature -40°C to +80°C
Maximum back-up fuse 315 A gG
Dimensions (H × W × D) Approx. 90 × 72 × 90 mm
Weight Approx. 0.614 kg
RoHS compliant Yes
Poles 4-pole
Device Type Surge protection device
Earthing System TN-S, TT
Nominal Discharge Current (In) 20 kA
Remote Signal Yes

Frequently Asked Questions

What is the Mersen 44120401 K1-4PG275-M used for?

It provides Type 1+2 surge protection for three-phase electrical installations against lightning currents, switching surges and transient overvoltages.

Does this model include remote monitoring?

Yes. The K1-4PG275-M features an integrated microswitch that allows the surge protection device status to be monitored remotely.

Which electrical systems is this SPD suitable for?

The device is designed for TT and TNS 230/400 V AC three-phase electrical distribution systems.

What surge current ratings does the device provide?

It provides a 12.5 kA lightning impulse current, 20 kA nominal discharge current and 50 kA maximum discharge current on the line modules.

How is the K1-4PG275-M installed?

The surge protection device installs onto a standard DIN rail and features pluggable protection cartridges for quick replacement during servicing.

Trusted Protection for Critical Electrical Systems

Mersen Surge-Trap® K Series surge protection devices are trusted by electrical engineers and panel builders worldwide to protect critical power distribution systems against lightning strikes and transient overvoltages.

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