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

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

Mersen STPT2-40K320V-1P Type 2 surge protection device with 40 kA maximum discharge current, 320 V AC Uc, 277 V L-N configuration and pluggable DIN rail mounting.

SKU: 83020108Alt SKU: STPT2-40K320V-1PMPN: 83020108
This product has been discontinued A direct replacement is available below.
K2-1P320 Mersen Surge Protector Type 2 SPD 1 Pole 277 Volt 20KA L-N Replacement product K2-1P320 Mersen Surge Protector Type 2 SPD 1 Pole 277 Volt 20KA L-N SKU: 44020106 £28.91 ex VAT View

Why Choose the Mersen 83020108 Surge Protection Device?

The Mersen 83020108 is a high performance Type 2 surge protection device (SPD) designed to protect low voltage electrical installations from transient overvoltages caused by switching operations and indirect lightning strikes. Part of the trusted Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for commercial, industrial and automation applications.

Designed for 277 V AC single phase L-N systems, the STPT2-40K320V-1P delivers a 40 kA maximum discharge current (Imax) and 20 kA nominal discharge current (In), helping protect sensitive equipment from damaging electrical surges. Its pluggable construction allows the protection module to be replaced quickly, reducing maintenance time and system disruption.

With a 320 V AC maximum continuous operating voltage (Uc), compact 1 pole, 1 module format and DIN rail mounting, the Mersen 83020108 is ideal for protecting distribution boards, control panels, automation equipment and low voltage electrical systems.

Key Advantages

  • Compact Type 2 surge protection device for low voltage installations.
  • 40 kA maximum discharge current (Imax).
  • 20 kA nominal discharge current (In).
  • 320 V AC maximum continuous operating voltage (Uc).
  • Pluggable module for quick replacement and maintenance.
  • DIN rail mounting for straightforward panel installation.

Key Features

  • Mersen Surge-Trap® Pluggable STPT2 Series.
  • Type 2 / Class II surge protection.
  • 40 kA Imax (8/20 μs).
  • 20 kA In (8/20 μs).
  • 277 V AC nominal operating voltage.
  • 320 V AC Uc.
  • Single phase L-N configuration.
  • 1 pole, 1 module pluggable design.

Reliable Protection Against Electrical Surges

Type 2 surge protection devices help divert transient overvoltages away from connected equipment, reducing the risk of electrical failures, component damage and costly downtime. They are commonly installed in distribution systems where reliable protection for downstream equipment is required.

The Mersen Surge-Trap® STPT2 Series combines strong surge handling capability with a compact DIN rail format and replaceable pluggable cartridge, making it a practical solution for industrial, commercial and automation environments.

Typical Applications

  • Industrial control panels.
  • Commercial electrical distribution boards.
  • PLC and automation systems.
  • Building electrical services.
  • OEM machinery.
  • Low voltage power distribution equipment.

Technical Specifications

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Voltage 277 V
Phase Single Phase
Poles 1-pole
Device Type Surge protection device
SPD Type Type 2
Earthing System TN-C, TN-S, TT
Nominal Discharge Current (In) 20 kA
Remote Signal No
Manufacturer Mersen
Series Surge-Trap® Pluggable STPT2 Series - 40 kA
Model STPT2-40K320V-1P
SKU 83020108
Product type Type 2 Surge Protection Device
SPD class Type 2 / Class II
Nominal operating voltage 277 V AC
Maximum continuous operating voltage (Uc) 320 V AC
Maximum discharge current (Imax) 40 kA
Nominal Discharge Current (In) 20 kA
Configuration TN-S, TN-C, TT
Number of poles 1 Pole
Module width 1 Module
Assembly format Pluggable
Mounting type DIN rail
Protection rating IP20
Voltage protection level (Up) ≤ 1.5 kV
Standards EN/IEC 61643-11, UL 1449
Replacement cartridge SP2-40K320V
HS Code 85363090
Country of Manufacture Spain

Frequently Asked Questions

What is the Mersen 83020108 used for?

It is used to protect low voltage electrical systems from transient overvoltages caused by switching operations and indirect lightning strikes.

What type of surge protection device is it?

The Mersen 83020108 is a Type 2 / Class II surge protection device with a pluggable module.

What voltage is this SPD designed for?

It is designed for 277 V AC single phase L-N systems with a 320 V AC maximum continuous operating voltage.

What is the maximum surge current rating?

The device provides a 40 kA maximum discharge current (Imax) and a 20 kA nominal discharge current (In).

Can the protection cartridge be replaced?

Yes. The pluggable cartridge design allows quick replacement when required without replacing the complete surge protection assembly.

Trusted by Electrical Professionals Worldwide

Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals to protect critical electrical infrastructure against damaging transient overvoltages.