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Mersen Surge Protector Type 1+2 SPD 4 Pole 230/400 Volt 25KA TNS Remote Indication

Mersen Surge Protector Type 1+2 SPD 4 Pole 230/400 Volt 25KA TNS Remote Indication

Mersen STPT12-25K275V-4PM Type 1+2 surge protection device with 25 kA lightning impulse current, remote indication and pluggable modules for 230/400 V AC three-phase plus neutral 4+0 TNS electrical systems.

SKU: 83120161Alt SKU: STPT12-25K275V-4PMMPN: 83120161
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List Price £597.87 ex VAT
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Why Choose the Mersen 83120161 STPT12-25K275V-4PM Surge Protection Device?

The Mersen 83120161 STPT12-25K275V-4PM is a premium Type 1+2 Surge Protection Device (SPD) designed to safeguard low-voltage electrical installations against lightning currents and transient overvoltages. Developed for demanding industrial, commercial and infrastructure applications, it provides dependable protection for switchboards, electrical distribution systems and sensitive electronic equipment.

As part of the trusted Mersen Surge-Trap® Pluggable STPT12 Series - 25kA, this DIN rail mounted SPD offers robust first-stage surge protection in a compact pluggable format. The integrated remote indication allows continuous monitoring of device status, while the pluggable cartridges simplify maintenance and minimise downtime.

Designed for 230/400 V AC three-phase plus neutral (3Ph+N) electrical systems using a 4+0 TNS configuration, the STPT12-25K275V-4PM delivers a 25 kA Iimp (10/350 μs) lightning impulse current rating and a 100 kA Imax (8/20 μs) discharge capability, making it ideal for protecting incoming power distribution boards in critical installations.

Key Advantages

  • Combined Type 1+2 surge protection against lightning currents and transient overvoltages.
  • 25 kA Iimp (10/350 μs) lightning impulse current per pole.
  • Designed for 230/400 V AC three-phase plus neutral TNS systems.
  • 4+0 TNS configuration for comprehensive system protection.
  • Integrated remote indication for external status monitoring.
  • 4-pole, 8-module pluggable construction for simplified maintenance.
  • DIN rail mounting for fast installation.

Key Features

  • Mersen Surge-Trap® Pluggable STPT12 Series - 25kA.
  • Type 1+2 / Class I+II surge protection device.
  • 25 kA Iimp (10/350 μs) lightning impulse current.
  • 100 kA Imax (8/20 μs) maximum discharge current.
  • 25 kA In (8/20 μs) nominal discharge current.
  • 230/400 V AC nominal operating voltage.
  • 275 V UC maximum continuous operating voltage.
  • Remote indication with pluggable cartridge construction.

Reliable Protection Against Lightning and Voltage Surges

Type 1+2 surge protection devices provide the primary defence against direct lightning currents and switching overvoltages entering an electrical installation. Installing an SPD at the incoming distribution board helps protect downstream electrical equipment, reduce downtime and improve installation reliability.

The Mersen STPT12 Series has been developed for demanding industrial and commercial environments where dependable surge protection is essential for maintaining operational continuity and protecting valuable electrical assets.

Typical Applications

  • Main electrical distribution boards.
  • Industrial manufacturing facilities.
  • Commercial buildings.
  • Control panels and switchboards.
  • Water treatment plants.
  • Data centres and telecommunications installations.
  • Renewable energy and infrastructure projects.

Technical Specifications

Voltage 400 V
Phase Three Phase
Manufacturer Mersen
Series Surge-Trap® Pluggable STPT12 Series - 25kA
Model STPT12-25K275V-4PM
Part number 83120161
EAN 8435297859147
Product type Type 1+2 Surge Protection Device
IEC classification Class I+II
Nominal operating voltage (Un) 230/400 V AC
Maximum continuous operating voltage (Uc) 275 V AC
System configuration TN-S
Protection modes L-PE / N-PE
Lightning impulse current (Iimp) 25 kA (10/350 μs)
Maximum discharge current (Imax) 100 kA (8/20 μs)
Nominal Discharge Current (In) 25 kA (8/20 μs)
Short circuit withstand (ISCCR) 25 kA
Number of poles 4
Number of modules 8
Mounting type DIN rail
Format Pluggable
Remote indication Yes
Protection rating IP20
Operating temperature -40°C to +85°C
Standards EN IEC 61643-11
RoHS compliant Yes
Poles 4-pole
Device Type Surge protection device
SPD Type Type 1+2
Earthing System TN-S
Nominal Discharge Current (In) 25 kA
Remote Signal Yes

Frequently Asked Questions

What is the Mersen 83120161 used for?

It protects low-voltage electrical installations from lightning currents and transient overvoltages.

What electrical system is this surge protection device designed for?

It is designed for 230/400 V AC three-phase plus neutral electrical systems using a 4+0 TNS configuration.

Does this version include remote indication?

Yes. The STPT12-25K275V-4PM includes remote indication for external monitoring of the device status.

Can the protection modules be replaced?

Yes. The pluggable cartridge design enables quick replacement while leaving the base installed.

Where should this SPD be installed?

It is intended for installation in the main incoming distribution board as the first stage of surge protection.

Trusted for Industrial Electrical Protection

Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and industrial facilities worldwide to provide dependable protection against lightning currents and transient overvoltages.

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