Call Us Today
01706 242050
Trade Portal
Mersen Surge Protector Type 2 SPD 4 Pole 120/208 Volt 20KA TT Remote Indication

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

Mersen STPT2-40K150V-4PGM Type 2 surge protection device with 40 kA Imax, 120 / 208 V AC nominal operating voltage, 150 V AC maximum continuous operating voltage, 3+1 TT configuration, pluggable DIN rail design and remote indication.

SKU: 83020145Alt SKU: STPT2-40K150V-4PGMMPN: 83020145
Price
List Price £173.09 ex VAT
Your Price (ex VAT)
£173.09
Manufacturer Lead Time Please contact us for a delivery time before you order
Get the best trade prices Trade exclusive

Create a trade account to unlock exclusive pricing, special offers and more.

Sign up for a trade account Quick & easy setup
SUBTOTAL (EX VAT) £173.09
Trade pricing is personalised to your account

Manufacturer Lead Time

£173.09

Why Choose the Mersen STPT2-40K150V-4PGM Surge Protection Device?

The Mersen STPT2-40K150V-4PGM (Part Number 83020145) is a high-performance Type 2 surge protection device (SPD) designed to protect three-phase plus neutral low-voltage electrical installations against transient overvoltages caused by lightning activity and electrical switching events. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for industrial, commercial and infrastructure electrical systems.

Featuring a 40 kA maximum discharge current (Imax), 150 V AC maximum continuous operating voltage (Uc), pluggable modular construction and remote indication, this SPD supports straightforward installation, rapid cartridge replacement and external monitoring of protection status.

Designed for 120 / 208 V AC three-phase plus neutral systems with a 3+1 TT configuration, the STPT2-40K150V-4PGM is well suited to protecting automation equipment, machine control panels, commercial switchboards, building services and critical low-voltage electrical installations.

Key Advantages

  • Reliable Type 2 surge protection device for three-phase plus neutral low-voltage systems.
  • 40 kA maximum discharge current for effective transient overvoltage protection.
  • 150 V AC maximum continuous operating voltage for 120 / 208 V AC installations.
  • Remote indication for external SPD status monitoring.
  • 3+1 TT configuration for applications requiring N-PE protection.
  • Compact 4-pole DIN rail mounting format for distribution boards and control panels.

Key Features

  • Mersen Surge-Trap® Pluggable STPT2 Series.
  • Type 2 / Class II surge protection device.
  • 40 kA Imax maximum discharge current using 8/20 μs waveform.
  • 20 kA nominal discharge current (In).
  • 120 / 208 V AC nominal operating voltage.
  • 150 V AC maximum continuous operating voltage (Uc).
  • Three-phase plus neutral, 3+1 TT configuration.
  • 4-pole, 4-module pluggable construction.
  • Remote indication contact for external monitoring.
  • DIN rail mounting for electrical panels.

Reliable Surge Protection for Three-Phase Plus Neutral Installations

Type 2 surge protection devices are installed within electrical distribution systems to help limit transient overvoltages before they reach sensitive connected equipment. This helps reduce equipment damage, minimise downtime and improve the reliability of critical electrical systems.

The Mersen STPT2 pluggable range combines high discharge capability with replaceable cartridges, visual indication and remote monitoring, making it suitable for preventative maintenance in control panels, low-voltage switchgear and commercial distribution boards.

Typical Applications

  • Three-phase plus neutral electrical distribution boards.
  • Industrial automation systems.
  • Machine control panels.
  • Commercial switchboards.
  • Building management systems.
  • Telecommunications and data infrastructure.
  • Water treatment facilities.
  • Low-voltage installations requiring 120 / 208 V AC surge protection with remote monitoring.

Technical Specifications

Voltage 208 V
Phase Three Phase
Manufacturer Mersen
Series Surge-Trap® Pluggable STPT2 Series - 40kA
Model STPT2-40K150V-4PGM
Item number 83020145
Product type Surge protection device
SPD Type Type 2 / Class II
UL SPD type Type 2 Component Assembly
Maximum discharge current 40 kA Imax (8/20 μs)
Nominal discharge current 20 kA In (8/20 μs)
Nominal operating voltage 120 / 208 V AC
Maximum continuous operating voltage 150 V AC
System configuration TN-S, TT
Number of poles 4 poles
Module width 4 modules
Format Pluggable
Remote indication Yes
Mounting type DIN rail
RoHS compliant Yes
EAN / UPC 8435297850816
HS Code 85363090
Country of Manufacture Spain
Poles 4-pole
Device Type Surge protection device
SPD Type Type 2
Earthing System TN-S, TT
Nominal Discharge Current (In) 20 kA
Remote Signal Yes

Frequently Asked Questions

What is the Mersen STPT2-40K150V-4PGM used for?

It is used to protect three-phase plus neutral low-voltage electrical installations and connected equipment against transient overvoltages caused by lightning activity and switching events.

What type of surge protection device is this?

The STPT2-40K150V-4PGM is a Type 2 / Class II surge protection device for electrical distribution and control systems.

What is the maximum discharge current rating?

This SPD has a 40 kA Imax maximum discharge current rating using an 8/20 μs waveform.

Does this model include remote indication?

Yes. The STPT2-40K150V-4PGM includes remote indication, allowing the device status to be monitored through external signalling or control systems.

What voltage is this model designed for?

It is designed for 120 / 208 V AC three-phase plus neutral systems with a 150 V AC maximum continuous operating voltage.

Trusted by Electrical Engineers Worldwide

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

● Service Agreements

Credit Accounts

Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.

 Priority sourcing and supply support

 Flexible payment terms for qualifying organisations

 Support for engineering, maintenance, and operations

500 +

Stock lines ready to ship

1,000 +

Same day dispatches

3500 +

Customers supported

28 

Trusted Manfacturers

● frequently asked questions

Common questions about our products and support

 

At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.

What product ranges do you supply

We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products. 

Can you help specify the correct part?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

Do you have stock for urgent orders?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

What are your delivery times and costs?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

What about warranties, returns and faulty items?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

● latest blog

Discover  our latest insights and
expert advice

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

by | Aug 11, 2026 |

LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.

LED Controls: Danfoss Drives Authorised Partner

LED Controls: Danfoss Drives Authorised Partner

by | Jan 17, 2026 |

2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...

LED Controls: Your Complete Control Panel Solution

LED Controls: Your Complete Control Panel Solution

by | Jan 17, 2026 |

2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...