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Mersen Surge Protector Type 2 SPD 4 Pole 277/480 Volt 20KA TT Remote Indication

Mersen Surge Protector Type 2 SPD 4 Pole 277/480 Volt 20KA TT Remote Indication

Mersen 83020149 STPT2-40K320V-4PGM Type 2 surge protection device with 40 kA maximum discharge current, 20 kA nominal discharge current, 320 V AC Uc, 277/480 V AC operation, 3+1 TT configuration, four-pole pluggable DIN rail construction and remote indication.

SKU: 83020149Alt SKU: STPT2-40K320V-4PGMMPN: 83020149
This product has been discontinued A direct replacement is available below.
K2-4PG320-M Mersen Surge Protector Type 2 SPD 4 Pole 277/480 Volt 20KA TT Remote Indication Replacement product K2-4PG320-M Mersen Surge Protector Type 2 SPD 4 Pole 277/480 Volt 20KA TT Remote Indication SKU: 44020409 £129.82 ex VAT View

Why Choose the Mersen 83020149 Surge Protection Device?

The Mersen 83020149 STPT2-40K320V-4PGM is a high-quality Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations from transient overvoltages caused by switching events and indirect lightning activity. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for commercial, industrial and infrastructure power distribution systems.

This pluggable surge arrester is designed for easy installation, fast cartridge replacement and reliable long-term operation. The integrated remote indication feature allows the device status to be monitored from control systems or building management equipment, making it suitable for installations where maintenance visibility and system uptime are important.

With a 40 kA maximum discharge current, 320 V AC maximum continuous operating voltage and 3+1 TT configuration, the Mersen 83020149 is suitable for three-phase plus neutral 277/480 V AC systems. Its four-pole, four-module DIN rail format makes it ideal for electrical distribution boards and industrial control panels.

Key Advantages

  • Reliable Type 2 surge protection device for low-voltage installations.
  • 40 kA maximum discharge current for robust transient overvoltage protection.
  • Designed for 277/480 V AC three-phase plus neutral systems.
  • 3+1 TT configuration suitable for TT earthing arrangements.
  • Pluggable cartridge design allows quick replacement during maintenance.
  • Remote indication supports easier monitoring of SPD status.

Key Features

  • Mersen Surge-Trap® Pluggable STPT2 Series.
  • Type 2 / Class II surge protection.
  • 40 kA Imax (8/20 μs) maximum discharge current.
  • 20 kA In (8/20 μs) nominal discharge current.
  • 277/480 V AC nominal operating voltage.
  • 320 V AC Uc maximum continuous operating voltage.
  • 3Ph+N electrical system configuration.
  • 3+1 TT protection arrangement.
  • Four-pole, four-module pluggable construction.
  • Remote indication for end-of-life monitoring.

Reliable Surge Protection for Electrical Distribution

Type 2 surge protection devices are installed within electrical distribution boards and control panels to limit transient overvoltages before they reach sensitive connected equipment. They help protect industrial automation equipment, power supplies, control circuits, drives, communication systems and electrical infrastructure from damaging voltage spikes.

The Mersen STPT2-40K320V-4PGM combines strong surge discharge capability with a practical pluggable construction and remote indication, making it a dependable choice for panel builders, electrical contractors and maintenance engineers working on monitored commercial and industrial installations.

Typical Applications

  • Three-phase electrical distribution boards.
  • Commercial and industrial power systems.
  • Manufacturing and automation control panels.
  • Building services and infrastructure installations.
  • Data, telecoms and utility equipment protection.
  • Panel building and electrical protection upgrades.

Technical Specifications

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Voltage 480 V
Phase Three Phase
Poles 4-pole
Device Type Surge protection device
SPD Type Type 2
Earthing System TN-S, TT
Nominal Discharge Current (In) 20 kA
Remote Signal Yes
Manufacturer Mersen
Series Surge-Trap® Pluggable STPT2 Series - 40kA
Model STPT2-40K320V-4PGM
Part number 83020149
Product type Type 2 surge protection device
SPD Type Type 2 / Class II
Maximum discharge current (Imax) 40 kA
Nominal Discharge Current (In) 20 kA
Waveform 8/20 μs
Nominal operating voltage 277 / 480 V AC
Maximum continuous operating voltage (Uc) 320 V AC
Electrical system 3-phase + neutral
Configuration TN-S, TT
Number of poles 4
Module width 4 modules
Format Pluggable
Mounting type DIN rail
Remote indication Yes
Protection rating IP20
Replacement plug L-N SP2-40K320V
Replacement plug N-PE SP2-40K-N
Standards IEC 61643-11, EN 61643-11, UL 1449
HS Code 85363090
Country of Manufacture Spain

Frequently Asked Questions

What is the Mersen 83020149 used for?

The Mersen 83020149 is used to protect low-voltage electrical installations from transient overvoltages caused by switching operations and indirect lightning activity.

What type of surge protection device is it?

It is a Type 2 / Class II surge protection device designed for installation in distribution boards and electrical control panels.

What is the maximum discharge current?

The device has a maximum discharge current of 40 kA with an 8/20 μs surge waveform.

What electrical system is this SPD suitable for?

The Mersen 83020149 is suitable for 277/480 V AC three-phase plus neutral TT systems using a 3+1 configuration.

Does the Mersen 83020149 include remote indication?

Yes. The STPT2-40K320V-4PGM includes remote indication, allowing the SPD status to be monitored from external systems or control equipment.

Trusted for Electrical Protection Worldwide

Mersen Surge-Trap® surge protection devices are trusted by electrical contractors, panel builders and industrial engineers to help protect critical power distribution systems from damaging transient overvoltages.