Call Us Today
01706 242050
Trade Portal
MERSEN FUSE A050 URB 008 T13 I A050URB008T13I

MERSEN FUSE A050 URB 008 T13 I A050URB008T13I

This high-speed Protistor® fuse offers reliable protection for semiconductor devices, delivering rapid response and optimal performance under fault conditions. Its compact 10x38mm design is ideal for integration in constrained industrial environments, supporting up to 500VAC and rated at 8A for precise safeguarding of sensitive equipment.

SKU: W076931Alt SKU: A050URB8T13IMPN: W076931
Price
List Price £29.12 ex VAT
Your Price (ex VAT)
£29.12
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) £29.12
Trade pricing is personalised to your account

Manufacturer Lead Time

Sold in packs of 10

£29.12

Why Choose the Mersen W076931 Semiconductor Fuse?

The Mersen W076931, catalogue number A050URB008T13I, is an ultra-fast Protistor® semiconductor fuse developed to protect sensitive power electronic equipment against damaging short-circuit currents. It features a rated current of 8 A, a rated voltage of 500 V AC and an integrated trip indicator, making it ideal for protecting semiconductor devices in industrial power conversion systems.

Designed in a compact 10 × 38 mm cylindrical format, the W076931 provides extremely rapid fault interruption with a 50 kA breaking capacity. It is suitable for protecting diodes, thyristors, IGBTs, rectifiers and similar semiconductor devices used in drives, UPS systems and industrial automation equipment.

Manufactured to Mersen's renowned Protistor® standards, this fuse offers dependable protection where fast current limitation is essential for preventing expensive damage to sensitive electronic components.

Key Advantages

  • Genuine Mersen Protistor® semiconductor fuse.
  • 8 A rated current.
  • 500 V AC voltage rating.
  • Ultra-fast protection for semiconductor devices.
  • Integrated trip indicator for rapid fuse identification.
  • 50 kA breaking capacity.
  • Compact 10 × 38 mm cylindrical design.
  • Suitable for industrial power electronic equipment.

Key Features

  • Mersen W076931 / A050URB008T13I.
  • Protistor® semiconductor fuse.
  • 8 A rated current.
  • 500 V AC rated voltage.
  • Ultra-fast operating characteristics.
  • Integrated trip indicator.
  • 10 × 38 mm cylindrical ceramic body.
  • Clip mounting.
  • Designed for semiconductor circuit protection.

Fast Protection for Sensitive Power Electronics

The Mersen W076931 has been engineered to minimise the electrical energy delivered to sensitive semiconductor components during fault conditions. Its ultra-fast operating characteristics help reduce equipment damage and improve the reliability of industrial power electronic systems.

The integrated trip indicator provides clear visual indication following fuse operation and can be used with compatible signalling accessories to simplify maintenance and reduce equipment downtime.

Typical Applications

  • Variable speed drives.
  • Industrial inverters.
  • Power converters.
  • UPS systems.
  • Rectifier equipment.
  • Industrial automation and control panels.

Technical Specifications

Item number W076931
Catalogue No A050URB8T13I
Description High-Speed Cylindrical Fuse Protistor® Size 10x38 aR 500VAC IEC 8A With Striker
EAN/UPC Code 3605340020625
Rated voltage AC IEC 500 V
Ampere Rating 8 A
RoHS Compliant Yes
AC or DC AC
Speed/Characteristic aR
Fuse Size 10x38
Mounting Clip
Clearing I2t At Rated Voltage 80 A²s
Melting I2t 2.3 A²s
AC Max I.R./Breaking Capacity I1: 50 kA
Design Details URB
Indication System Yes
Indication System Type Striker
Connection/Terminal Material Silver-Plated Copper
Connection/Terminal Type Ferrule
Product Diameter 10.3 mm
Product Length 39.2 mm
Sell Pack Quantity 10 EA
Sell Pack Weight 0.092 kg
Sell Pack Width 54 mm
Sell Pack Length 80 mm
Sell Pack Height 12 mm
Product group Semiconductor Protection Fuses
Body/Insulating Material Ceramic
Product Weight 0.0092 kg
Power Dissipation at Rated Current Value 1.585 W
HS Code 85361010
Fuse Type Semiconductor
Fuse Size 10x38 mm
Fuse Class aR
Voltage 500 V

Frequently Asked Questions

What is the Mersen W076931 used for?

The W076931 is an ultra-fast semiconductor fuse designed to protect sensitive power electronic equipment against damaging fault currents.

What is the current rating of the W076931?

The fuse has a rated current of 8 A.

What voltage is the W076931 rated for?

The fuse is rated for applications operating at up to 500 V AC.

Does the W076931 include a trip indicator?

Yes. The fuse incorporates an integrated mechanical trip indicator to simplify maintenance and fault identification.

What fuse holder is required?

The W076931 is designed for use in a compatible 10 × 38 mm clip-type fuse holder.

Trusted Semiconductor Protection from Mersen

Mersen Protistor® semiconductor fuses are trusted worldwide by electrical engineers, panel builders and OEMs for protecting industrial power electronic equipment operating in demanding environments.

● 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...