MERSEN FUSE 250V F 4 A 5.25 250VF4A5.25

MERSEN FUSE 250V F 4 A 5.25 250VF4A5.25

Mersen X079002 fast-acting miniature ceramic cartridge fuse with a 4 A current rating, 250 V AC voltage rating, 5 x 25 mm format and integrated striker.

SKU: X079002Alt SKU: 250VF4A5.25MPN: X079002
Price
List Price £17.03 ex VAT
Your Price (ex VAT)
£17.03
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) £17.03
Trade pricing is personalised to your account

Manufacturer Lead Time

Sold in packs of 20

£17.03

Why Choose the Mersen X079002 Fast-Acting Miniature Fuse?

The Mersen X079002 is a compact fast-acting miniature cartridge fuse designed to protect electrical and electronic equipment against damaging overcurrents and short circuits. Its rapid F operating characteristic enables the fuse to interrupt abnormal current quickly, helping to reduce electrical and thermal stress on protected components.

With a rated current of 4 A and a rated operating voltage of 250 V AC, the X079002 is suitable for industrial controls, instrumentation, electronic assemblies and specialised electrical equipment. Its ceramic cartridge construction provides reliable insulation and thermal performance in demanding operating environments.

The fuse uses a compact 5 × 25 mm cylindrical format for installation in a compatible clip-mounted fuse holder. It also incorporates a trip indicator or striker, allowing compatible equipment to provide mechanical or remote indication when the fuse has operated and helping maintenance personnel identify the affected circuit quickly.

Key Advantages

  • Fast-acting fuse for rapid overcurrent and short-circuit protection.
  • 4 A rated current for electrical and electronic circuits.
  • 250 V AC rated operating voltage.
  • Compact 5 × 25 mm cylindrical cartridge format.
  • Integrated striker supports clear fuse-operation indication.
  • Ceramic construction provides reliable thermal and electrical performance.
  • Clip mounting enables straightforward installation and replacement.
  • Suitable for industrial control, instrumentation and electronic equipment.

Key Features

  • Mersen miniature cartridge fuse.
  • Manufacturer reference: X079002.
  • 4 A nominal current rating.
  • 250 V AC rated voltage.
  • Fast-acting F characteristic.
  • 5 × 25 mm nominal fuse size.
  • Ceramic cylindrical cartridge body.
  • Metal ferrule end terminals.
  • Integrated trip indicator or striker.
  • Designed for clip mounting in a compatible fuse holder.

Fast and Dependable Circuit Protection

Fast-acting fuses respond rapidly when current rises beyond an acceptable level. This helps limit the duration of a fault and reduces the energy passed into wiring, electronic components and control equipment.

The Mersen X079002 combines fast operation with a durable ceramic cartridge and an integrated striker. When installed in compatible indication equipment, the striker can activate a visual, mechanical or remote signalling device after the fuse operates, simplifying fault diagnosis and maintenance.

Typical Applications

  • Industrial control circuits.
  • Electronic equipment and assemblies.
  • Instrumentation and measuring systems.
  • Power supply control circuits.
  • Automation equipment.
  • Special-purpose electrical machinery.
  • Laboratory and test equipment.
  • Circuits requiring fuse-operation indication.

Technical Specifications

Current 4 A
Voltage 250 V
Manufacturer Mersen
Item number X079002
Product type Fast-acting miniature cartridge fuse
Rated current 4 A
Rated voltage 250 V AC
Current type AC
Operating characteristic Fast acting (F)
Nominal fuse size 5 × 25 mm
Nominal diameter approximately 5.25 mm
Mounting type Clip mounting
Terminal type Ferrule end caps
Body material Ceramic
Indicator Integrated trip indicator / striker
Replacement requirement Match current, voltage, speed, size and striker configuration
Device Type Fuse link
Fuse Type Miniature
Fuse Size 5x25 mm
Fuse Class Fast acting

Frequently Asked Questions

What is the Mersen X079002 used for?

The Mersen X079002 is used to protect electrical and electronic circuits against excessive current and short-circuit faults.

What is the current rating of the X079002?

The fuse has a nominal current rating of 4 A.

What voltage is the Mersen X079002 rated for?

The X079002 is rated for operation at up to 250 V AC.

Is the X079002 a fast-acting fuse?

Yes. It has a fast-acting F characteristic designed to interrupt abnormal currents rapidly.

Does the Mersen X079002 include a fuse indicator?

Yes. The fuse incorporates a striker that can provide mechanical or remote fuse-operation indication when used with compatible equipment.

Trusted Fuse Protection from Mersen

Mersen miniature fuses are used by electrical engineers, equipment manufacturers and maintenance professionals to provide dependable overcurrent protection in industrial, electronic and specialised electrical applications.

● 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...