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

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

Mersen STPT12-25K275V-4P Type 1+2 surge protection device with 25 kA lightning impulse current rating for 230/400 V AC three-phase plus neutral 4+0 TNS electrical systems.

SKU: 83120160Alt SKU: STPT12-25K275V-4PMPN: 83120160
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List Price £548.50 ex VAT
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Manufacturer Lead Time

£548.50

Why Choose the Mersen 83120160 STPT12-25K275V-4P Surge Protection Device?

The Mersen 83120160 STPT12-25K275V-4P is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations against lightning currents and transient overvoltages. Developed for industrial, commercial and infrastructure applications, it provides reliable protection for electrical distribution systems, switchboards and critical equipment exposed to surge events.

Part of the proven Mersen Surge-Trap® Pluggable STPT12 Series - 25kA, this DIN rail mounted SPD is engineered as the first level of protection within main distribution boards. Its pluggable design allows rapid module replacement while maintaining high system availability and simplified maintenance.

Designed for 230/400 V AC three-phase plus neutral (3Ph+N) electrical systems using a 4+0 TNS configuration, the STPT12-25K275V-4P delivers a powerful 25 kA Iimp (10/350 μs) lightning impulse current rating per pole together with a 100 kA maximum discharge current, making it ideal for installations requiring robust primary surge protection.

Key Advantages

  • Combined Type 1+2 surge protection for lightning currents and transient overvoltages.
  • 25 kA Iimp (10/350 μs) lightning impulse current rating per pole.
  • Designed for 230/400 V AC three-phase plus neutral TNS systems.
  • 4+0 TNS configuration for comprehensive system protection.
  • 4-pole, 8-module pluggable construction for simple servicing.
  • DIN rail mounting for straightforward installation.
  • Visual end-of-life indication for simplified maintenance.

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.
  • Pluggable cartridge design with DIN rail mounting.

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 costly downtime and improve installation reliability.

The Mersen STPT12 Series is designed for demanding industrial and commercial environments where dependable surge protection is essential for maintaining business continuity and protecting valuable assets.

Typical Applications

  • Main electrical distribution boards.
  • Industrial manufacturing facilities.
  • Commercial buildings.
  • Control panels and switchboards.
  • Water treatment facilities.
  • Data centres and telecommunications equipment.
  • 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-4P
Part number 83120160
EAN 8435297859130
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
Indication Visual status indicator
Protection rating IP20
Standards EN IEC 61643-11
RoHS compliant Yes
HS Code 85363090
Country of Manufacture Spain
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 No

Frequently Asked Questions

What is the Mersen 83120160 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.

What is the lightning impulse current rating?

The device provides a 25 kA Iimp (10/350 μs) lightning impulse current rating per pole.

Can the protection modules be replaced?

Yes. The pluggable cartridge design allows quick replacement of protection modules 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 level of surge protection.

Trusted for Industrial Electrical Protection

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

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