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Mersen Surge Protector Type 1+2 SPD 2 Pole 230 Volt 25KA TT

Mersen Surge Protector Type 1+2 SPD 2 Pole 230 Volt 25KA TT

Mersen STPT12-25K275V-2PG Type 1+2 surge protection device with 25 kA lightning impulse current rating and 275 V UC for 230 V AC single-phase plus neutral 1+1 TT electrical systems.

SKU: 83120154MPN: 83120154
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List Price £255.26 ex VAT
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Why Choose the Mersen 83120154 STPT12-25K275V-2PG Surge Protection Device?

The Mersen 83120154 STPT12-25K275V-2PG is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations from lightning currents and transient overvoltages. Built for industrial, commercial and infrastructure applications, it provides dependable protection for electrical distribution systems, control panels and sensitive connected equipment.

Part of the trusted Mersen Surge-Trap® Pluggable STPT12 Series - 25kA, this DIN rail mounted surge protection device provides robust first-stage protection in a compact pluggable format. Its 1+1 TT configuration makes it suitable for single-phase plus neutral installations where both line-neutral and neutral-earth protection are required.

Designed for 230 V AC single-phase plus neutral (1Ph+N) TT electrical systems, the STPT12-25K275V-2PG provides a powerful 25 kA Iimp (10/350 μs) lightning impulse current rating. With a 275 V UC line-neutral maximum continuous operating voltage, it is ideal for incoming distribution boards requiring dependable 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 capability.
  • Designed for 230 V AC single-phase plus neutral TT systems.
  • 1+1 TT configuration for L-N and N-PE protection.
  • 2-pole, 4-module pluggable design for straightforward maintenance.
  • DIN rail mounting for quick installation in electrical distribution panels.
  • Suitable as first-stage protection in main incoming power supply panels.

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 V AC nominal operating voltage.
  • 275 V UC line-neutral maximum continuous operating voltage.
  • 2-pole, 4-module pluggable format for TT installations.

Reliable Protection Against Lightning and Voltage Surges

Surge protection devices help reduce the risk of equipment damage caused by lightning strikes, switching operations and transient overvoltage events. Installing a Type 1+2 SPD at the incoming distribution board provides a robust first line of defence for downstream electrical equipment and control systems.

The Mersen STPT12 Series - 25kA range is engineered for demanding electrical environments, offering dependable surge protection for switchboards, automation systems, industrial machinery, commercial facilities and infrastructure installations where operational continuity is essential.

Typical Applications

  • Main electrical distribution boards.
  • Single-phase plus neutral TT electrical systems.
  • Commercial building electrical installations.
  • Industrial control panels.
  • Automation and machinery control systems.
  • Telecom, IT and data centre power systems.
  • Infrastructure and utility installations.

Technical Specifications

Voltage 230 V
Manufacturer Mersen
Series Surge-Trap® Pluggable STPT12 Series - 25kA
Model STPT12-25K275V-2PG
Part number 83120154
Product type Type 1+2 Surge Protection Device
IEC classification Class I+II
Nominal operating voltage (Un) 230 V AC
Maximum continuous operating voltage (Uc L-N) 275 V AC
System configuration TN-S, TT
Protection modes L-N / 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 2
Number of modules 4
Mounting type DIN rail
Format Pluggable
Protection rating IP20
Standards EN 61643-11 / IEC 61643-11
RoHS compliant Yes
Poles 2-pole
Device Type Surge protection device
SPD Type Type 1+2
Earthing System TN-S, TT
Nominal Discharge Current (In) 25 kA
Remote Signal No

Frequently Asked Questions

What is the Mersen 83120154 used for?

It is used to protect low-voltage electrical installations against lightning currents and transient overvoltages.

What type of surge protection device is this?

The 83120154 is a Type 1+2 / Class I+II surge protection device designed for lightning current discharge and transient overvoltage protection.

What electrical system is this device designed for?

It is designed for 230 V AC single-phase plus neutral electrical systems using a 1+1 TT configuration.

What is the lightning impulse current rating?

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

Where should this SPD be installed?

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

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, switching surges and transient overvoltages.

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