Call Us Today
01706 242050
Trade Portal
K1-2PG275-M Mersen Surge Protector Type 1+2 SPD 2 Pole 230 Volt 20KA TT Remote Indication

K1-2PG275-M Mersen Surge Protector Type 1+2 SPD 2 Pole 230 Volt 20KA TT Remote Indication

Mersen K1-2PG275-M Type 1+2 surge protection device with remote signalling for TT single-phase electrical systems.

SKU: 44120201Alt SKU: K1-2PG275-MMPN: 44120201
Price
List Price £174.04 ex VAT
Your Price (ex VAT)
£174.04
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) £174.04
Trade pricing is personalised to your account

Manufacturer Lead Time

£174.04

Why Choose the Mersen K1-2PG275-M Type 1+2 Surge Protection Device?

The Mersen K1-2PG275-M, product code 44120201, is a premium Type 1+2 Surge Protection Device (SPD) designed to protect single-phase TT (1Ph+N) electrical installations against lightning strikes and transient overvoltages. As part of the Mersen Surge-Trap® K1 Series, it combines coordinated line-to-neutral (L-N) and neutral-to-earth (N-PE) protection in a compact, pluggable two-pole assembly with an integrated remote signalling microswitch for continuous status monitoring.

Designed for installation at the main distribution board, the K1-2PG275-M features a 1+1 protection configuration, a maximum continuous operating voltage (Uc) of 275 V AC, and replaceable protection cartridges for fast maintenance. The built-in remote contact enables connection to building management systems (BMS), PLCs or alarm systems, allowing maintenance teams to receive immediate notification when replacement is required.

Offering a 12.5 kA lightning impulse current (Iimp), 50 kA maximum discharge current (Imax), 20 kA nominal discharge current (In) and a voltage protection level (Up ≤1.5 kV), the K1-2PG275-M provides reliable protection for commercial, industrial and infrastructure installations while complying with IEC 61643-11.

Key Advantages

  • Combined Type 1 + Type 2 surge protection.
  • Integrated remote signalling microswitch for status monitoring.
  • Designed specifically for TT (1Ph+N) electrical systems.
  • 1+1 coordinated protection for L-N and N-PE.
  • Pluggable cartridges simplify maintenance.
  • 50 kA maximum discharge current (Imax) per protection path.

Key Features

  • Manufacturer: Mersen
  • Series: Surge-Trap® K1
  • Model: K1-2PG275-M
  • Product code: 44120201
  • SPD Type: IEC Class I + II (Type 1+2)
  • Configuration: 1+1
  • Integrated remote indication microswitch.
  • Visual status indication.

Coordinated TT Surge Protection with Remote Monitoring

The Mersen K1-2PG275-M provides coordinated protection for both line-to-neutral and neutral-to-earth conductors within TT electrical systems. Its Type 1+2 design safely diverts lightning currents and switching surges before they can damage sensitive electrical equipment, making it ideal for installation at the origin of the electrical installation.

The integrated remote signalling contact enables maintenance personnel to monitor the operational status of the SPD from a building management system or PLC, ensuring rapid identification of end-of-life modules and reducing maintenance downtime.

Typical Applications

  • Main electrical distribution boards.
  • Commercial buildings.
  • Industrial facilities.
  • Residential electrical installations.
  • Solar PV systems.
  • Battery energy storage systems.
  • EV charging infrastructure.
  • Building management systems.
  • Telecommunications equipment.

Technical Specifications

SPD Type Type 1+2
Voltage 230 V
Manufacturer Mersen
Series Surge-Trap® K1
Model K1-2PG275-M
Product code 44120201
EAN 8435297886631
Product type Type 1+2 Surge Protection Device
IEC SPD classification Class I + II
UL SPD classification Type 1 Component Assembly
Configuration TN-S, TT
System type TT (1Ph+N)
Nominal operating voltage (Un) 230 V AC
Maximum continuous operating voltage (Uc L-N) 275 V AC
Maximum continuous operating voltage (Uc N-PE) 255 V AC
Lightning impulse current (Iimp 10/350 μs) 12.5 kA
Nominal discharge current (In 8/20 μs) 20 kA
Maximum discharge current (Imax 8/20 μs) 50 kA
Voltage protection level (Up) ≤1.5 kV
Protection modes L-N / N-PE
Following current (Ifi) 100 A
Short-circuit withstand (ISCCR) 25 kA
Remote indication Integrated microswitch
Status indication Green (OK) / Not green (replace)
Mounting 35 mm DIN rail
Format Pluggable
Number of poles 2
Maximum back-up fuse 315 A gG
Torque 3 Nm
Housing material PA6 CT1 & PA66 CT1
Flammability rating UL94 V-0
Width 36 mm
Height 90 mm
Depth 90.4 mm
Weight Approx. 0.27 kg
RoHS compliant Yes
Applicable standard IEC 61643-11
Poles 2-pole
Device Type Surge protection device
Earthing System TN-S, TT
Nominal Discharge Current (In) 20 kA
Remote Signal Yes

Frequently Asked Questions

What is the Mersen K1-2PG275-M used for?

It protects TT single-phase electrical installations against lightning currents and transient overvoltages while providing remote monitoring of the surge protection device.

What is the difference between the K1-2PG275 and K1-2PG275-M?

The K1-2PG275-M includes an integrated remote signalling microswitch, allowing the operational status of the SPD to be monitored remotely.

Which earthing system is it designed for?

The device is specifically designed for TT (1Ph+N) electrical systems.

Are the protection cartridges replaceable?

Yes. Both surge protection cartridges are pluggable and can be replaced without removing the DIN rail base.

Where is this SPD normally installed?

It is installed within the main electrical distribution board to provide primary surge protection for the entire installation.

Trusted By Electrical Professionals

Mersen Surge-Trap® K1 Series surge protection devices are trusted worldwide by electrical engineers, panel builders and contractors for reliable lightning protection, transient overvoltage suppression and intelligent remote monitoring in critical electrical installations.

● 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...