MERSEN FUSE 250V FA 0,25A 5.20 AL L205906

MERSEN FUSE 250V FA 0,25A 5.20 AL L205906

Mersen L205906 MI5FAP25V0.25 high speed semiconductor miniature fuse rated at 0.25 A and 250 V AC, with a compact 5 x 20 mm body and axial leads for PCB mounting.

SKU: L205906MPN: L205906
Price
List Price £3.48 ex VAT
Your Price (ex VAT)
£3.48
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) £3.48
Trade pricing is personalised to your account

Manufacturer Lead Time

Sold in packs of 200

£3.48

Why Choose the Mersen L205906 High Speed Semiconductor Fuse?

The Mersen L205906 is a compact high speed semiconductor miniature fuse designed to protect sensitive electronic components and semiconductor devices against overcurrent and short-circuit faults. Part of the Mersen MI5FA 250 V axial-lead fuse series, it provides very fast fault interruption to help minimise damaging electrical and thermal energy.

Its FA high speed operating characteristic makes the fuse suitable for electronic circuits where conventional general-purpose fuses may not respond quickly enough to protect delicate semiconductor components. The axial wire leads enable direct integration into printed circuit boards and compact electronic assemblies.

With a rated current of 0.25 A, a rated voltage of 250 V AC and a standard 5 × 20 mm body, the Mersen L205906 provides precise protection for low-current applications. Its compact dimensions and direct-solder mounting help simplify installation within industrial electronics, control equipment and power supplies.

Key Advantages

  • Very fast-acting semiconductor protection fuse.
  • 0.25 A rated current for sensitive low-current circuits.
  • 250 V AC voltage rating.
  • Compact 5 × 20 mm miniature fuse format.
  • Axial wire leads support direct PCB installation.
  • Very high breaking capacity helps protect valuable components.

Key Features

  • Mersen MI5FA semiconductor miniature fuse series.
  • 0.25 A rated current.
  • 250 V AC rated voltage.
  • High Speed FA operating characteristic.
  • 5 × 20 mm cylindrical fuse body.
  • Axial wire leads for direct solder mounting.
  • Suitable for printed circuit boards and electronic assemblies.
  • Designed for sensitive semiconductor component protection.
  • RoHS-compliant construction.

Fast Protection for Sensitive Electronic Components

Semiconductor devices can be damaged by excessive current within a very short period. The Mersen L205906 uses a very fast FA characteristic to interrupt electrical faults rapidly, helping reduce the let-through energy transferred to protected components.

Its axial lead construction allows the fuse to be soldered directly onto a printed circuit board, providing a compact and secure installation. This makes it particularly suitable for original equipment manufacturers, electronics engineers and industrial control system designers.

Typical Applications

  • Semiconductor device protection.
  • Printed circuit boards.
  • Industrial electronic equipment.
  • Power supplies and control circuits.
  • Automation and process control equipment.
  • Electronic measuring and instrumentation systems.

Technical Specifications

Current 25 A
Voltage 250 V
Manufacturer Mersen
Series MI5FA/FB 250 V Axial-Lead Semiconductor Miniature Fuses
Item number L205906
Catalogue number MI5FAP25V0.25
Product type High speed semiconductor miniature fuse
Rated current 0.25 A
Rated voltage 250 V AC
Current type AC
Speed / characteristic High Speed FA
Fuse size 5 × 20 mm
Mounting type Axial lead mounting
Connection method Direct soldering to PCB or electronic components
Breaking capacity Very high breaking capacity
Primary application Semiconductor and electronic component protection
Compliance RoHS compliant
EAN / UPC 3605340190106
Device Type Fuse link
Fuse Type Miniature, Semiconductor
Fuse Size 5x20 mm

Frequently Asked Questions

What is the Mersen L205906 used for?

The Mersen L205906 provides very fast overcurrent and short-circuit protection for sensitive semiconductor devices, electronic components and printed circuit board assemblies.

What is the current rating of the Mersen L205906?

The fuse has a rated current of 0.25 A, which is equivalent to 250 mA.

What voltage is the Mersen L205906 rated for?

The Mersen L205906 is rated for operation at up to 250 V AC.

What size is the Mersen L205906 fuse?

It has a compact cylindrical fuse body measuring 5 × 20 mm.

How is the Mersen L205906 installed?

The fuse has axial wire leads that allow it to be soldered directly onto a printed circuit board or connected to compatible electronic components.

Trusted by Electrical and Electronic Engineers Worldwide

Mersen high speed miniature fuses are widely used to protect sensitive semiconductor components, providing rapid fault interruption and compact integration within industrial and electronic equipment.

● 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...