MERSEN FUSE 125V FA 14 A 5.20 MI5FA12,5V14

MERSEN FUSE 125V FA 14 A 5.20 MI5FA12,5V14

Mersen F085933 MI5FA12.5V14 high-speed 5 x 20 mm semiconductor fuse rated at 14 A and 125 V AC for semiconductor and industrial electronic protection.

SKU: F085933Alt SKU: MI5FA12,5V14MPN: F085933
Price
List Price £3.91 ex VAT
Your Price (ex VAT)
£3.91
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.

SUBTOTAL (EX VAT) £3.91
Trade pricing is personalised to your account

Manufacturer Lead Time

Sold in packs of 50

£3.91

Why Choose the Mersen F085933 High-Speed Miniature Fuse?

The Mersen F085933, catalogue reference MI5FA12.5V14, is a high-speed miniature semiconductor fuse designed to provide rapid protection for sensitive semiconductor devices, electronic circuits and industrial control equipment against damaging overcurrents and short circuits. It forms part of Mersen's 5 × 20 mm FA 125 V fuse series, delivering reliable protection for demanding electronic applications.

With a rated current of 14 A and a rated voltage of 125 V AC, the F085933 is ideal for protecting power supplies, industrial electronics, instrumentation and semiconductor equipment. Its very fast-acting FA characteristic rapidly interrupts fault currents, helping minimise thermal stress and damage to valuable electronic components.

Manufactured in a compact 5 × 20 mm ceramic cartridge format with ferrule end caps, the fuse is designed for installation into compatible clip-mounted fuse holders. Its robust construction makes it suitable for industrial environments where dependable overcurrent protection is essential.

Key Advantages

  • High-speed semiconductor protection fuse.
  • 14 A rated current for industrial electronic applications.
  • 125 V AC rated voltage.
  • Very fast-acting FA characteristic for rapid fault interruption.
  • Compact 5 × 20 mm miniature fuse.
  • Ceramic construction with ferrule end caps.
  • Designed to protect sensitive semiconductor devices.
  • Suitable for industrial automation and electronic equipment.

Key Features

  • Mersen 5 × 20 mm FA 125 V fuse series.
  • 14 A rated current.
  • 125 V AC rated voltage.
  • Very fast-acting FA operating characteristic.
  • Ceramic cartridge body.
  • Ferrule end cap construction.
  • Clip mounting.
  • Designed for semiconductor protection.
  • RoHS compliant.

Rapid Protection for Sensitive Electronic Equipment

High-speed semiconductor fuses are engineered to interrupt fault currents extremely quickly, helping protect semiconductors, power electronic devices and sensitive control circuits from excessive thermal and electrical stress. Their rapid operation improves equipment reliability and reduces the likelihood of expensive component failures.

The Mersen F085933 combines a compact ceramic construction with a high-performance FA operating characteristic, making it suitable for demanding industrial electronics and semiconductor applications where dependable circuit protection is essential.

Typical Applications

  • Semiconductor device protection.
  • Industrial automation equipment.
  • Electronic power supplies.
  • Power electronic assemblies.
  • Instrumentation systems.
  • Industrial control panels.
  • Electronic manufacturing equipment.
  • Sensitive electronic circuits.

Technical Specifications

Current 14 A
Voltage 125 V
Manufacturer Mersen
Item number F085933
Catalogue number MI5FA12.5V14
Product type Miniature semiconductor protection fuse
Series 5 × 20 FA 125 V
Rated current 14 A
Rated voltage 125 V AC
AC or DC rating AC
Operating characteristic High speed / Very fast acting (FA)
Fuse size 5 × 20 mm
Connection type Ferrule ends
Mounting type Clip mounting
Body material Ceramic
Packed quantity 50
EAN / UPC 3605340072990
Device Type Fuse link
Fuse Type Miniature, Semiconductor
Fuse Size 5x20 mm
Fuse Class Fast acting

Frequently Asked Questions

What is the Mersen F085933 used for?

The Mersen F085933 protects semiconductor devices, electronic circuits and industrial control equipment against damaging overcurrents and short circuits.

What is the current rating of the Mersen F085933?

The fuse has a rated current of 14 A.

What voltage is the F085933 rated for?

The Mersen F085933 is rated for 125 V AC.

Is the Mersen F085933 a fast-acting fuse?

Yes. It features a very fast-acting FA characteristic specifically designed for semiconductor protection.

How is the Mersen F085933 installed?

The fuse has ferrule end caps and is designed for installation into a compatible 5 × 20 mm clip-mounted fuse holder.

Trusted Electrical Protection from Mersen

Mersen miniature semiconductor fuses are trusted worldwide by automation engineers, panel builders and equipment manufacturers for dependable protection of sensitive electronic and semiconductor 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…

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

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

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...