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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 83230129 STPT23-20K320V-4PGM Type 2+3 surge protection device with 20 kA discharge capacity, 320 V AC continuous operating voltage, 3+1 TT configuration and remote indication.

SKU: 83230129Alt SKU: STPT23-20K320V-4PGMMPN: 83230129
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List Price £134.93 ex VAT
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Why Choose the Mersen 83230129 Surge Protection Device?

The Mersen 83230129 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 dependable protection for three-phase plus neutral systems in commercial, industrial and automation environments.

Engineered for DIN rail installation, this pluggable SPD helps safeguard sensitive electrical equipment from voltage spikes caused by lightning activity, switching operations and network disturbances. Its compact modular format allows quick replacement, while the integrated remote indication contact enables simple monitoring of device status.

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 83230129 is ideal for protecting switchboards, machinery panels, PLC systems, drives and industrial control equipment operating on 230/400 V AC or 277/480 V AC electrical systems.

Key Advantages

  • High performance Type 2+3 surge protection device.
  • 20 kA maximum discharge current for reliable transient overvoltage protection.
  • 320 V AC continuous operating voltage for higher voltage low voltage systems.
  • 3+1 TT four-pole configuration for three-phase plus neutral installations.
  • Remote indication contact for easy status monitoring.
  • Pluggable modular design for fast maintenance and replacement.

Key Features

  • Mersen Surge-Trap® Pluggable STPT23 Series.
  • Model: STPT23-20K320V-4PGM.
  • 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).
  • Four-pole, 3+1 TT configuration.
  • Remote indication with pluggable cartridge format.

Reliable Protection Against Electrical Surges

Surge protection devices help divert damaging transient voltages away from connected equipment before they can cause insulation breakdown, electronic failure or costly downtime. Installing an SPD improves system resilience and helps protect valuable automation and electrical infrastructure.

The Mersen Surge-Trap® STPT23 range is designed for low voltage installations requiring compact and reliable final stage surge protection, making it suitable for use in distribution boards, switchboards, control panels and machinery systems.

Typical Applications

  • Industrial control panels.
  • Electrical distribution boards.
  • Automation and machinery systems.
  • Commercial building services.
  • PLC, drive and instrumentation protection.
  • Three-phase plus neutral TT electrical installations.

Technical Specifications

Voltage 480 V
Phase Three Phase
Manufacturer Mersen
Series Surge-Trap® Pluggable STPT23 Series
Model STPT23-20K320V-4PGM
SKU 83230129
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 voltage pulse (Uoc) 10 kV
Continuous operating voltage (Uc) 320 V AC
Nominal operating voltage (Un) 230/400 V AC, 277/480 V AC
System configuration TN-S, TT
Number of poles 4
Number of modules 4
Mounting type DIN rail
Format Pluggable modular device
Remote indication Yes
Protection rating IP20
Standard EN/IEC 61643-11
RoHS compliant Yes
EAN/UPC 8435297849315
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 Yes

Frequently Asked Questions

What is the Mersen 83230129 used for?

It is used to protect low voltage electrical installations and connected equipment from transient overvoltages caused by lightning activity, switching events and electrical disturbances.

What type of surge protection device is the Mersen 83230129?

The Mersen 83230129 is a Type 2+3 / Class II+III surge protection device.

What is the maximum discharge current of this SPD?

This device has a maximum discharge current of 20 kA (8/20 μs) and a nominal discharge current of 10 kA.

What electrical system is this device 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.

Does the Mersen 83230129 include remote indication?

Yes. The device includes remote indication, allowing the operational status of the SPD to be monitored from an electrical panel, control system or building management system.

Trusted by Electrical Professionals Worldwide

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

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