Call Us Today
01706 242050
Trade Portal
Mersen Surge Protector Type 2 SPD 2 Pole 120 Volt 20KA TT

Mersen Surge Protector Type 2 SPD 2 Pole 120 Volt 20KA TT

Mersen STPT2-40K150V-2PG Type 2 surge protection device with 40 kA maximum discharge current, 150 V AC Uc, 120 V AC 1Ph+N 1+1 TT configuration and pluggable DIN rail mounting.

SKU: 83020114Alt SKU: STPT2-40K150V-2PGMPN: 83020114
Price
List Price £81.59 ex VAT
Your Price (ex VAT) Save 26%
£60.30 26% OFF
You save £21.29 per unit
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) £60.30
Trade pricing is personalised to your account

Manufacturer Lead Time

£60.30

Why Choose the Mersen 83020114 Surge Protection Device?

The Mersen 83020114 is a compact Type 2 surge protection device (SPD) designed to protect low voltage electrical installations from transient overvoltages caused by switching operations, grid disturbances and indirect lightning effects. Part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides reliable protection for single phase power distribution systems.

The STPT2-40K150V-2PG is designed for 120 V AC 1Ph+N TT systems and provides a 40 kA maximum discharge current (Imax) with a 20 kA nominal discharge current (In). Its 1+1 TT configuration helps protect both line-to-neutral and neutral-to-earth paths, making it suitable for coordinated surge protection in distribution boards and electrical panels.

With a 150 V AC maximum continuous operating voltage (Uc), compact 2 pole, 2 module pluggable design and DIN rail mounting, the Mersen 83020114 is ideal for protecting commercial, industrial and automation systems from damaging voltage surges.

Key Advantages

  • Compact Type 2 surge protection device for low voltage installations.
  • 40 kA maximum discharge current (Imax).
  • 20 kA nominal discharge current (In).
  • 150 V AC maximum continuous operating voltage (Uc).
  • 1+1 TT configuration for 1Ph+N systems.
  • Pluggable module design for quick maintenance and replacement.

Key Features

  • Mersen Surge-Trap® Pluggable STPT2 Series.
  • Type 2 / Class II surge protection.
  • 40 kA Imax (8/20 μs).
  • 20 kA In (8/20 μs).
  • 120 V AC nominal operating voltage.
  • 150 V AC Uc.
  • 1Ph+N, 1+1 TT configuration.
  • 2 pole, 2 module DIN rail mounted design.

Reliable Protection Against Electrical Surges

Type 2 surge protection devices help divert transient overvoltages away from connected electrical equipment, reducing the risk of component damage, nuisance failures and costly downtime. They are commonly used in distribution boards as part of a coordinated low voltage surge protection strategy.

The Mersen Surge-Trap® STPT2 Series combines high surge handling capability with a compact DIN rail format and replaceable pluggable cartridges, making it a practical choice for maintaining reliable electrical protection in demanding installations.

Typical Applications

  • Single phase 120 V TT electrical systems.
  • Commercial distribution boards.
  • Industrial control panels.
  • PLC and automation systems.
  • Building electrical services.
  • Low voltage power distribution equipment.

Technical Specifications

Voltage 120 V
Phase Single Phase
Manufacturer Mersen
Series Surge-Trap® Pluggable STPT2 Series - 40 kA
Model STPT2-40K150V-2PG
SKU 83020114
Product type Type 2 Surge Protection Device
SPD class Type 2 / Class II
Nominal operating voltage 120 V AC
Maximum continuous operating voltage (Uc) 150 V AC
Maximum discharge current (Imax) 40 kA
Nominal Discharge Current (In) 20 kA
Configuration TN-S, TT
Number of poles 2 Poles
Module width 2 Modules
Assembly format Pluggable
Mounting type DIN rail
Remote indication No
Voltage protection level ≤ 1 kV L-N, ≤ 1.5 kV N-PE
Standards EN/IEC 61643-11, UL 1449
Replacement cartridges SP2-40K150V, SP2-40K-N
HS Code 85363090
Country of Manufacture Spain
Poles 2-pole
Device Type Surge protection device
SPD Type Type 2
Earthing System TN-S, TT
Nominal Discharge Current (In) 20 kA
Remote Signal No

Frequently Asked Questions

What is the Mersen 83020114 used for?

It is used to protect low voltage single phase TT electrical systems from transient overvoltages caused by switching operations, grid disturbances and indirect lightning effects.

What type of surge protection device is it?

The Mersen 83020114 is a Type 2 / Class II surge protection device with a pluggable module design.

What voltage is this SPD designed for?

It is designed for 120 V AC 1Ph+N systems with a 150 V AC maximum continuous operating voltage.

What does 1+1 TT mean?

1+1 TT refers to a surge protection configuration used in single phase TT systems, providing protection between line and neutral as well as neutral and protective earth.

Can the protection cartridges be replaced?

Yes. The pluggable design allows the protection cartridges to be replaced quickly when required without replacing the complete surge protection assembly.

Trusted by Electrical Professionals Worldwide

Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals to protect critical electrical infrastructure against 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...