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Mersen Surge Protector Type 1+2 SPD 4 Pole 120/208 Volt 20KA TNS Remote Indication

Mersen Surge Protector Type 1+2 SPD 4 Pole 120/208 Volt 20KA TNS Remote Indication

Mersen STPT12-12K150V-4PM Type 1+2 surge protection device with 12.5 kA lightning impulse current rating for 120/208 V AC three-phase plus neutral systems.

SKU: 83120143Alt SKU: STPT12-12K150V-4PMMPN: 83120143
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List Price £395.53 ex VAT
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Why Choose the Mersen 83120143 STPT12-12K150V-4PM Surge Protection Device?

The Mersen 83120143 STPT12-12K150V-4PM is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations from lightning currents and transient overvoltages. Engineered for industrial, commercial and infrastructure applications, it provides reliable protection for sensitive equipment and electrical distribution systems.

Part of the trusted Mersen Surge-Trap® STPT12 Series, this pluggable surge protection device combines lightning current discharge capability with transient overvoltage protection in a compact DIN rail mounted design. Its remote indication feature enables easy status monitoring and simplifies maintenance within electrical control panels.

Designed for 120/208 V AC three-phase + neutral (3Ph+N) systems with a 4+0 TNS configuration, the 83120143 offers a 12.5 kA Iimp (10/350 μs) lightning impulse current rating per pole, making it ideal for incoming distribution boards where reliable first-stage surge protection is essential.

Key Advantages

  • Combined Type 1+2 surge protection for lightning and transient overvoltage protection.
  • 12.5 kA Iimp (10/350 μs) lightning impulse current capability.
  • Designed for 120/208 V AC 3Ph+N TNS systems.
  • Compact 4-pole pluggable modular design.
  • Remote indication contact for monitoring system status.
  • DIN rail mounting for straightforward installation.
  • Suitable as the first stage of surge protection in incoming distribution panels.

Key Features

  • Mersen Surge-Trap® STPT12 Series.
  • Type 1+2 / Class I+II surge protection device.
  • 12.5 kA Iimp (10/350 μs) lightning impulse current.
  • 50 kA Imax (8/20 μs) maximum discharge current.
  • 120/208 V AC nominal operating voltage.
  • 150 V UC maximum continuous operating voltage.
  • 4-pole pluggable module with remote indication.
  • DIN rail mounted enclosure.

Reliable Protection Against Lightning and Voltage Surges

Surge protection devices help safeguard electrical installations from damage caused by lightning strikes and switching transients. Installing a Type 1+2 SPD at the incoming distribution board significantly reduces the risk of equipment failure, downtime and costly repairs.

The Mersen STPT12 series is engineered for demanding industrial environments, offering dependable protection for control systems, automation equipment, switchboards and other critical electrical assets.

Typical Applications

  • Main electrical distribution boards.
  • Industrial control panels.
  • Commercial buildings.
  • Manufacturing facilities.
  • Infrastructure and utility installations.
  • Critical automation and control systems.

Technical Specifications

Voltage 208 V
Phase Three Phase
Manufacturer Mersen
Series Surge-Trap® STPT12
Model STPT12-12K150V-4PM
Part number 83120143
Product type Type 1+2 Surge Protection Device
IEC classification Class I+II
Nominal operating voltage (Un) 120/208 V AC
Maximum continuous operating voltage (Uc) 150 V AC
System configuration TN-S
Lightning impulse current (Iimp) 12.5 kA (10/350 μs)
Maximum discharge current (Imax) 50 kA (8/20 μs)
Number of poles 4
Mounting type DIN rail
Format Pluggable
Remote indication Yes
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) 20 kA
Remote Signal Yes

Frequently Asked Questions

What is the Mersen 83120143 used for?

It is a Type 1+2 surge protection device designed to protect electrical installations against lightning currents and transient overvoltages.

Where should this surge protection device be installed?

It is typically installed at the incoming electrical distribution board as the primary stage of surge protection.

What electrical system is this device designed for?

The device is intended for 120/208 V AC three-phase plus neutral (3Ph+N) TNS electrical systems.

Does the device provide status indication?

Yes. It includes visual status indication together with a remote indication contact for monitoring and maintenance purposes.

Is the module replaceable?

Yes. The pluggable design allows the protection module to be replaced quickly without removing the complete base from the DIN rail.

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 and transient overvoltages while helping maximise equipment uptime.

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