Call Us Today
01706 242050
Trade Portal
MERSEN FUSE 250B3 BTKF42V250

MERSEN FUSE 250B3 BTKF42V250

Robust BS88 gG Type B3 fuse-link rated at 250A for AC/DC applications with central bolted tag mounting, compliant with IEC and BS88 standards.

SKU: BTKF42V250Alt SKU: BTKF42V250MPN: Z226319
Price
List Price £53.14 ex VAT
Your Price (ex VAT)
£53.14
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) £53.14
Trade pricing is personalised to your account

Manufacturer Lead Time

£53.14

Why Choose the Mersen BTKF42V250 BS88 Fuse Link?

The Mersen BTKF42V250 is a high performance BS88 gG central bolted tag fuse link designed to provide dependable general-purpose protection for low voltage electrical distribution systems. Manufactured by Mersen, this industrial fuse link delivers reliable overload and short-circuit protection while offering excellent current limiting characteristics for demanding electrical installations.

Manufactured in accordance with BS88 Part 2 and EN 60269-2, the BTKF42V250 is designed for installation in compatible fuse holders, fuse switch disconnectors or directly onto busbars using its central bolted tag configuration. Its robust ceramic construction ensures dependable performance in commercial, industrial and OEM applications.

With a 250 A current rating, 415 V AC / 240 V DC voltage rating and gG utilisation category, the BTKF42V250 provides comprehensive circuit protection for electrical distribution equipment, switchgear and industrial power systems.

Key Advantages

  • High performance BS88 gG central bolted tag fuse link.
  • 250 A current rating for industrial electrical protection.
  • 415 V AC and 240 V DC voltage rating.
  • Excellent current limiting performance for overload and short-circuit protection.
  • Manufactured to BS88 Part 2 and EN 60269-2 standards.
  • Suitable for switchgear, busbars, distribution boards and fuse switch disconnectors.

Key Features

  • Mersen BTKF Series.
  • 250 A rated current.
  • 415 V AC / 240 V DC rated voltage.
  • gG general-purpose protection.
  • Central bolted tag Type B3 construction.
  • High breaking capacity ceramic fuse body.
  • Excellent current limiting characteristics.
  • Suitable for direct busbar mounting or compatible fuse holders.

Reliable Protection for Industrial Power Distribution

The Mersen BTKF42V250 is engineered to interrupt overload and fault currents rapidly, protecting electrical equipment, cables and switchgear from damage. Its current limiting design reduces thermal and mechanical stress during fault conditions, helping improve system reliability and minimise downtime.

Widely specified by electrical engineers, panel builders and industrial maintenance professionals, the BTKF series delivers dependable protection across a broad range of commercial and industrial electrical distribution applications.

Typical Applications

  • Industrial electrical distribution systems.
  • Switchgear and fuse switch disconnectors.
  • Power distribution panels.
  • Busbar protection.
  • OEM machinery and equipment.
  • Commercial electrical installations.

Technical Specifications

Item number Z226319
Catalogue No BTKF42V250
Description British Standard fuse-link IEC BS88 gG Type B3 415VAC 240VDC 250A BTKF Central Bolted Tag
EAN/UPC Code 3605340267969
Rated voltage AC IEC 415 V
Rated voltage DC IEC 240 V
Ampere Rating 250 A
RoHS Compliant Yes
AC or DC AC/DC
Speed/Characteristic gG
Fuse Size B3
Mounting Bolted
Clearing I2t At Rated Voltage 532000 A²s
Melting I2t 190000 A²s
AC Max I.R./Breaking Capacity I1: 80 kA
Max. Rated Breaking Capacity DC 40 kA
Connection/Terminal Material Tin-Plated Copper
Connection/Terminal Type Central Bolted Tag
Product Diameter 41.9 mm
Product Length 138 mm
Sell Pack Quantity 1 EA
Sell Pack Weight 0.305 kg
Sell Pack Width 53 mm
Sell Pack Length 142 mm
Sell Pack Height 53 mm
Product group Low Voltage IEC Fuses
Body/Insulating Material Ceramic
Product Weight 0.305 kg
Power Dissipation at Rated Current Value 24 W
HS Code 85361090
Country of Manufacture India
Fuse Class gG
Voltage 415 V

Frequently Asked Questions

What is the Mersen BTKF42V250 used for?

The BTKF42V250 provides general-purpose overload and short-circuit protection for industrial and commercial low voltage electrical distribution systems.

What is the current rating of this fuse?

This fuse has a 250 A rated current.

What voltage is the BTKF42V250 designed for?

The fuse is rated for applications up to 415 V AC and 240 V DC.

Which standards does this fuse comply with?

The BTKF42V250 complies with BS88 Part 2 and EN 60269-2 standards for low voltage fuse links.

Where is this fuse typically installed?

It is commonly installed in compatible fuse holders, fuse switch disconnectors or bolted directly onto busbars in industrial power distribution equipment.

Trusted by Electrical Professionals Worldwide

Mersen BS88 fuse links are trusted by electrical engineers, panel builders and maintenance professionals for delivering dependable circuit protection, high breaking capacity and long-term reliability in industrial power distribution systems.

● 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...