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K2-4P320-M Mersen Surge Protector Type 2 SPD 4 Pole 277/480 Volt 20KA TNS Remote Indication

K2-4P320-M Mersen Surge Protector Type 2 SPD 4 Pole 277/480 Volt 20KA TNS Remote Indication

Mersen 44020413 K2-4P320-M Type 2 surge protection device for 277/480 V AC TNS systems featuring a 4+0 configuration, 20 kA nominal discharge current, 50 kA maximum discharge current and integrated remote indication.

SKU: 44020413Alt SKU: K2-4P320-MMPN: 44020413
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List Price £171.36 ex VAT
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Manufacturer Lead Time

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Why Choose the Mersen 44020413 K2-4P320-M Surge Protection Device?

The Mersen 44020413, also known as the K2-4P320-M, is a premium Type 2 surge protection device (SPD) engineered to protect low-voltage electrical installations from transient overvoltages caused by indirect lightning strikes and electrical switching events. As part of the Mersen Surge-Trap® K2 Series, this pluggable four-pole SPD is specifically designed for 277/480 V AC TNS electrical systems and incorporates an integrated remote indication microswitch for continuous status monitoring.

Featuring a 4+0 protection configuration, the K2-4P320-M provides dedicated protection for each live conductor, making it ideal for industrial switchboards, motor control centres, automation systems and commercial electrical installations. With a 20 kA nominal discharge current and a 50 kA maximum discharge current, it delivers dependable protection for sensitive electrical and electronic equipment.

Its reinforced pluggable construction allows rapid replacement of protection cartridges while leaving the DIN rail base in place. The integrated remote microswitch enables connection to PLCs, SCADA systems, alarms or building management systems, allowing maintenance teams to monitor the operational condition of the SPD without opening the electrical panel.

Key Advantages

  • Reliable Type 2 surge protection for industrial and commercial installations.
  • 50 kA maximum discharge current for effective transient suppression.
  • 20 kA nominal discharge current for dependable long-term protection.
  • 4+0 protection configuration designed for TNS electrical systems.
  • Integrated remote indication microswitch for external monitoring.
  • Pluggable cartridges simplify maintenance and replacement.
  • Visual green operational status indicator.
  • Compact DIN rail mounting for straightforward installation.

Key Features

  • Mersen Surge-Trap® K2 Series.
  • Type 2 / IEC Class II surge protection device.
  • UL Type 1 Component Assembly.
  • Four-pole 4+0 configuration.
  • 277/480 V AC nominal operating voltage.
  • 320 V AC maximum continuous operating voltage (Uc).
  • 20 kA nominal discharge current (In).
  • 50 kA maximum discharge current (Imax).
  • Integrated remote alarm microswitch.
  • Visual status indication.
  • Dynamic thermal disconnection with open-circuit failure mode.
  • DIN rail pluggable construction.

Advanced Surge Protection with Remote Monitoring

Transient overvoltages generated by lightning activity, switching operations and power network disturbances can damage automation systems, PLCs, variable speed drives and other sensitive equipment. The Mersen K2-4P320-M safely diverts surge energy away from connected equipment, helping minimise downtime and extending equipment life.

The integrated remote indication microswitch enables maintenance teams to monitor the condition of the surge protection device through building management systems, PLCs or SCADA platforms. This supports preventative maintenance while reducing the need for manual inspections of electrical distribution boards.

Typical Applications

  • Industrial electrical distribution boards.
  • Commercial switchboards.
  • Motor control centres.
  • Automation and PLC control panels.
  • Manufacturing facilities.
  • Building management systems.
  • Critical infrastructure installations.
  • 277/480 V AC TNS electrical networks.

Technical Specifications

SPD Type Type 2
Voltage 480 V
Phase Three Phase
Manufacturer Mersen
Series Surge-Trap® K2 Series
Model K2-4P320-M
Manufacturer part number 44020413
EAN 8435297889977
Product type Type 2 surge protection device
IEC SPD classification Class II
UL SPD classification Type 1 Component Assembly
Internal configuration 4+0
Nominal operating voltage 277/480 V AC
Nominal frequency 50 / 60 Hz
Maximum continuous operating voltage (Uc) 320 V AC
Nominal Discharge Current (In) 20 kA
Maximum discharge current (Imax) 50 kA
Voltage protection level (Up) ≤1.5 kV
Protection modes L-PE / N-PE
Network configuration TN-S
Number of poles 4
Short-circuit current rating 100 kA
Maximum back-up fuse 315 A gG
Remote indication Integrated microswitch
Remote contact rating 250 V AC at 0.5 A / 30 V DC at 1 A
Protection rating IP20
Mounting type DIN rail
Connection torque 3 N·m
Solid conductor capacity 1.5 to 35 mm²
Stranded conductor capacity 1.5 to 25 mm²
Remote indication conductor capacity 0.5 to 1.5 mm²
Operating temperature -40 to +85 °C
Maximum installation altitude 4,000 m
Housing material PA6 CT1 & PA66 CT1
Flammability rating UL94 V-0
Dimensions (H × W × D) 90 × 72 × 74.4 mm
Weight approx. 0.448 kg
RoHS compliant Yes
HS Code 85363090
Country of Manufacture Spain
Poles 4-pole
Device Type Surge protection device
Earthing System TN-S
Nominal Discharge Current (In) 20 kA
Remote Signal Yes

Frequently Asked Questions

What is the Mersen 44020413 used for?

The Mersen 44020413 is a Type 2 surge protection device designed to protect 277/480 V TNS electrical installations against transient overvoltages caused by lightning activity and switching events.

What is the difference between the K2-4P320 and K2-4P320-M?

The K2-4P320-M includes an integrated remote indication microswitch, allowing the operational status of the surge protection device to be monitored remotely through external control systems.

What surge current can the K2-4P320-M withstand?

The device provides a nominal discharge current of 20 kA and a maximum discharge current of 50 kA.

Can the protection cartridges be replaced?

Yes. The pluggable surge protection cartridges can be replaced individually without removing the complete DIN rail base.

Where is the Mersen K2-4P320-M typically installed?

The device is commonly installed in industrial distribution boards, commercial switchboards, motor control centres and automation panels operating on 277/480 V AC TNS systems.

Trusted Surge Protection from Mersen

Mersen Surge-Trap® K2 Series surge protection devices are trusted worldwide to improve electrical system reliability while protecting valuable industrial, commercial and infrastructure equipment against damaging transient overvoltages.

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