Call Us Today
01706 242050
Trade Portal
MERSEN FUSE H 2409P BCKUP TS VDE442-88/125 45DB240V125PTS

MERSEN FUSE H 2409P BCKUP TS VDE442-88/125 45DB240V125PTS

Mersen B1018326 Limitor-PTS high voltage DIN back-up fuse with low power dissipation and thermal striker, rated 24 kV AC and 125 A for transformer protection.

SKU: B1018326Alt SKU: 45DB240V125PTSMPN: B1018326
Price
List Price £278.74 ex VAT
Your Price (ex VAT) Save 34%
£185.33 34% OFF
You save £93.41 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) £185.33
Trade pricing is personalised to your account

Manufacturer Lead Time

£185.33

Why Choose the Mersen B1018326 High Voltage DIN Back-up Fuse?

The Mersen B1018326 is a premium Limitor®-PTS high voltage DIN back-up fuse-link with low power dissipation and an integrated thermal striker, specifically designed to provide dependable transformer protection in medium voltage electrical distribution systems. Manufactured in accordance with IEC 60282-1 and VDE 0670 T402, it delivers outstanding fault interruption performance whilst reducing thermal loading inside modern switchgear.

The innovative Limitor®-PTS series incorporates a redesigned pure silver fuse element together with Mersen's patented thermal striker technology, helping prevent overheating within fuse compartments. Constructed using pure silver fuse elements, silver-plated copper end caps and a durable ceramic body, the B1018326 provides exceptional electrical reliability and a long operational service life.

With a 24 kV AC voltage rating, 125 A current rating and 88 mm diameter × 442 mm length construction, the Mersen B1018326 is ideally suited for protecting transformers installed within air insulated and gas insulated switchgear used across industrial plants, substations and utility distribution networks.

Key Advantages

  • Designed specifically for medium voltage transformer protection.
  • Patented thermal striker helps prevent switchgear overheating.
  • Low power dissipation improves operational efficiency.
  • 24 kV AC rated voltage.
  • 125 A rated current.
  • Manufactured to IEC 60282-1 and VDE 0670 T402.
  • Integrated 80 N thermal striker.
  • Recommended for compatible Siemens and Ormazabal switchgear.

Key Features

  • Manufacturer: Mersen.
  • Series: Limitor®-PTS.
  • Part number: B1018326.
  • Catalogue number: 45DB240V125PTS.
  • Rated voltage: 24 kV AC.
  • Rated current: 125 A.
  • Fuse dimensions: 88 mm diameter × 442 mm length.
  • Low power dissipation fuse technology.
  • Integrated 80 N thermal striker.
  • High strength ceramic body with silver-plated copper terminals.

Reliable Protection for Modern Medium Voltage Networks

The Limitor®-PTS range has been developed to protect transformers whilst reducing heat generation inside modern switchgear. Its innovative fuse element design and patented thermal striker technology improve operational reliability and help extend equipment life without compromising fault interruption capability.

The B1018326 is particularly suitable for gas insulated and air insulated switchgear used throughout industrial facilities, substations and utility distribution systems where dependable transformer protection is essential.

Typical Applications

  • Medium voltage transformers.
  • Gas insulated switchgear (GIS).
  • Air insulated switchgear.
  • Industrial electrical distribution.
  • Utility substations.
  • OEM medium voltage equipment.

Technical Specifications

Voltage 240 V
Manufacturer Mersen
Series Limitor®-PTS
Model B1018326
Catalogue number 45DB240V125PTS
Product type High voltage DIN back-up fuse
Application Transformer protection
Rated voltage 24 kV AC
Rated current 125 A
Breaking capacity 65 kA
Minimum breaking current 440 A
Clearing I²t 290 kA²s
Fuse size 88 mm × 442 mm
Body material Ceramic
Fuse element Pure silver
Terminal material Silver-plated copper
Power dissipation 254 W
Thermal striker 80 N
Weight Approx. 6.1 kg
HS Code 85351000
Country of Manufacture Hungary
Device Type Fuse link
Fuse Type High voltage
Current 125 A

Frequently Asked Questions

What is the Mersen B1018326 used for?

The B1018326 is a high voltage DIN back-up fuse designed to protect transformers against high short-circuit currents in medium voltage electrical systems.

What are the electrical ratings?

This fuse is rated for 24 kV AC operation with a 125 A current rating.

What is the benefit of the Limitor®-PTS series?

The Limitor®-PTS range features low power dissipation and a patented thermal striker to help reduce overheating inside switchgear whilst maintaining excellent fault protection.

Does this fuse include a thermal striker?

Yes. The fuse incorporates an integrated 80 N thermal striker compatible with modern transformer switchgear.

Which standards does this fuse comply with?

The B1018326 complies with IEC 60282-1 and VDE 0670 T402 for high voltage DIN back-up fuse-links.

Trusted for Medium Voltage Protection

Mersen Limitor®-PTS fuse-links are trusted worldwide by utilities, switchgear manufacturers and industrial engineers for dependable transformer protection, reduced thermal losses and reliable medium voltage network performance.

● 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...