MERSEN FUSE 250V FA 5 A 5.20 R084011

MERSEN FUSE 250V FA 5 A 5.20 R084011

Mersen R084011 MI5FA25V5 high-speed semiconductor miniature fuse rated at 5 A and 250 V AC with a 5 x 20 mm ceramic body and FA very fast-acting characteristic.

SKU: R084011MPN: R084011
Price
List Price £2.56 ex VAT
Your Price (ex VAT)
£2.56
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) £2.56
Trade pricing is personalised to your account

Manufacturer Lead Time

Sold in packs of 50

£2.56

Why Choose the Mersen R084011 High-Speed Semiconductor Fuse?

The Mersen R084011, catalogue reference MI5FA25V5, is a high-speed ceramic miniature fuse designed to provide rapid overcurrent and short-circuit protection for sensitive semiconductor devices and electronic equipment. As part of Mersen's 5 × 20 mm FA miniature fuse series, it delivers reliable protection for industrial automation, measuring equipment and power electronics where fast fault interruption is essential.

Its FA very fast-acting characteristic helps minimise the energy transmitted during fault conditions, reducing the risk of damage to semiconductors such as diodes, thyristors, IGBTs and rectifiers. The ceramic body provides excellent thermal performance together with a high breaking capacity for demanding industrial applications.

With a rated current of 5 A and a rated voltage of 250 V AC, the R084011 is suitable for protecting compact electronic circuits and power control equipment. Its standard 5 × 20 mm clip-mounted format allows quick installation into compatible miniature fuse holders.

Key Advantages

  • Very fast-acting FA semiconductor protection fuse.
  • 5 A rated current for industrial electronic circuits.
  • 250 V AC rated voltage.
  • Compact 5 × 20 mm ceramic cartridge.
  • High breaking capacity for dependable fault interruption.
  • Suitable for semiconductor devices, instrumentation and control equipment.

Key Features

  • Mersen MI5FA25V5 miniature semiconductor fuse.
  • 5 A rated current.
  • 250 V AC rated voltage.
  • FA very fast-acting characteristic.
  • 5 × 20 mm ceramic body.
  • Clip mounting.
  • High-speed protection for semiconductor devices.
  • RoHS compliant.

Reliable Protection for Sensitive Electronic Equipment

Semiconductor devices require rapid protection because they can be permanently damaged by even short-duration fault currents. The Mersen R084011 is engineered to interrupt fault conditions quickly, helping reduce thermal stress and extending the service life of protected electronic components.

Its compact ceramic construction and standard 5 × 20 mm dimensions make it suitable for industrial automation equipment, measuring instruments, power supplies and other electronic systems where dependable, high-speed circuit protection is required.

Typical Applications

  • Semiconductor protection.
  • Industrial automation equipment.
  • Electronic power supplies.
  • Power converters and rectifiers.
  • Instrumentation and measuring equipment.
  • Industrial control systems.

Technical Specifications

Current 5 A
Voltage 250 V
Manufacturer Mersen
Series Semiconductor Miniature Fuses Size 5 × 20 FA/FB 125 V to 250 V
Model R084011
Catalogue number MI5FA25V5
Product type High-speed semiconductor miniature fuse
Rated current 5 A
Rated voltage 250 V AC
Fuse size 5 × 20 mm
Operating characteristic FA (very fast acting)
Body material Ceramic
Mounting type Clip mounting
Supply type AC
Compliance RoHS
EAN 3605340059588
Device Type Fuse link
Fuse Type Miniature, Semiconductor
Fuse Size 5x20 mm
Fuse Class Fast acting

Frequently Asked Questions

What is the Mersen R084011 used for?

The Mersen R084011 provides very fast overcurrent protection for semiconductor devices, industrial electronics and sensitive control circuits.

What is the current rating of the R084011 fuse?

The fuse has a rated current of 5 A.

What voltage is the Mersen R084011 rated for?

The fuse is rated for operation on circuits up to 250 V AC.

Is the R084011 a time-delay fuse?

No. It has an FA very fast-acting characteristic, making it suitable for protecting sensitive semiconductor components.

How is the Mersen R084011 installed?

The fuse has a standard 5 × 20 mm ceramic body designed for installation in compatible clip-mounted miniature fuse holders.

Trusted Semiconductor Protection from Mersen

Mersen high-speed miniature fuses are trusted worldwide by panel builders, automation engineers and equipment manufacturers to provide dependable protection for semiconductor devices and industrial electronic 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...