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Mersen Surge Protector Type 2+3 SPD 4 Pole 230/400: 277/480 Volt 10KA TT

Mersen Surge Protector Type 2+3 SPD 4 Pole 230/400: 277/480 Volt 10KA TT

Mersen STPT23-20K320V-4PG Type 2+3 surge protection device with 20 kA discharge capacity, 320 V AC continuous operating voltage and 3+1 TT four-pole configuration.

SKU: 83230128Alt SKU: STPT23-20K320V-4PGMPN: 83230128
Price
List Price £117.34 ex VAT
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Why Choose the Mersen 83230128 Surge Protection Device?

The Mersen 83230128 is a high performance Type 2+3 Surge Protection Device (SPD) designed to protect low voltage electrical installations against transient overvoltages. Part of the Mersen Surge-Trap® Pluggable STPT23 Series, this device provides reliable protection for three-phase plus neutral electrical systems used in commercial, industrial and automation applications.

Engineered as a final stage of surge protection, the device diverts damaging voltage spikes caused by lightning strikes and switching operations away from sensitive electrical equipment. Its pluggable modular construction enables rapid replacement, helping minimise maintenance time while maintaining system protection.

With a maximum discharge current of 20 kA (8/20 μs), a 320 V AC continuous operating voltage (Uc) and a 3+1 TT configuration, the Mersen 83230128 is ideal for protecting switchboards, control panels, PLCs, drives and industrial automation equipment operating on 230/400 V AC and 277/480 V AC systems.

Key Advantages

  • High performance Type 2+3 surge protection device.
  • 20 kA maximum discharge current for dependable transient overvoltage protection.
  • 320 V AC continuous operating voltage for higher voltage low voltage systems.
  • 3+1 TT configuration suitable for three-phase plus neutral installations.
  • Pluggable modular design for quick maintenance and replacement.
  • Protects sensitive electrical, automation and control equipment.

Key Features

  • Mersen Surge-Trap® Pluggable STPT23 Series.
  • Model: STPT23-20K320V-4PG.
  • Type 2+3 / Class II+III surge protection device.
  • 20 kA Imax (8/20 μs).
  • 10 kA nominal discharge current (In).
  • 320 V AC continuous operating voltage (Uc L-N).
  • Four-pole 3+1 TT configuration.
  • Pluggable four-module DIN rail format.

Reliable Protection Against Electrical Surges

Surge protection devices safely divert transient overvoltages away from connected equipment before they can cause insulation failure, electronic damage or costly downtime. Installing an SPD helps improve equipment reliability and extends the service life of sensitive industrial electronics.

The Mersen Surge-Trap® STPT23 Series is designed as the final stage of surge protection in panels where upstream Type 2 protection is already installed, making it ideal for industrial automation, commercial buildings, telecommunications, water treatment facilities and renewable energy applications.

Typical Applications

  • Industrial control panels.
  • Electrical distribution boards.
  • Automation and machinery systems.
  • Commercial buildings.
  • PLC, drive and instrumentation protection.
  • Telecommunications, renewable energy and water treatment installations.

Technical Specifications

Voltage 480 V
Phase Three Phase
Manufacturer Mersen
Series Surge-Trap® Pluggable STPT23 Series
Model STPT23-20K320V-4PG
SKU 83230128
Product type Surge Protection Device (SPD)
SPD classification Type 2+3 / Class II+III
Maximum discharge current (Imax) 20 kA (8/20 μs)
Nominal Discharge Current (In) 10 kA
Combined discharge voltage (Uoc) 10 kV
Continuous operating voltage (Uc L-N) 320 V AC
Continuous operating voltage (Uc N-PE) 255 V AC
Nominal operating voltage (Un) 230/400 V AC, 277/480 V AC
System configuration TN-S, TT
Protection modes L-N / N-PE
Number of poles 4
Number of modules 4
Mounting type DIN rail
Protection rating IP20
Short circuit withstand (ISCCR) 25 kA
Maximum back-up fuse 63 A gG
Response time 25 ns
Dimensions (H × W × D) 90 × 72 × 70 mm
Weight Approx. 0.34 kg
HS Code 85363090
Country of Manufacture Spain
Poles 4-pole
Device Type Surge protection device
SPD Type Type 2+3
Earthing System TN-S, TT
Nominal Discharge Current (In) 10 kA
Remote Signal No

Frequently Asked Questions

What is the Mersen 83230128 used for?

It protects low voltage electrical installations and connected equipment against transient overvoltages caused by lightning strikes and switching events.

What type of surge protection device is it?

The Mersen 83230128 is a Type 2+3 / Class II+III surge protection device.

What electrical system is this SPD designed for?

It is designed for 230/400 V AC and 277/480 V AC three-phase plus neutral TT systems using a 3+1 configuration.

How is the device installed?

The device features a pluggable four-module DIN rail design, allowing fast installation and simple cartridge replacement during maintenance.

What is the maximum discharge current?

The Mersen 83230128 provides a maximum discharge current of 20 kA (8/20 μs) with a nominal discharge current of 10 kA.

Trusted by Electrical Professionals Worldwide

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

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