Call Us Today
01706 242050
Trade Portal
MERSEN FUSE 6,900 CP AR 14.51 0012 FR14AR69V12

MERSEN FUSE 6,900 CP AR 14.51 0012 FR14AR69V12

The Protistor® 14×51 aR 12A fuse delivers rapid fault interruption and reliable safeguarding of sensitive semiconductor devices in demanding industrial environments. Rated for 690VAC with a breaking capacity of 160 kA.

SKU: FR14AR69V12Alt SKU: FR14AR69V12MPN: L1027328
Price
List Price £13.00 ex VAT
Your Price (ex VAT)
£13.00
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) £13.00
Trade pricing is personalised to your account

Manufacturer Lead Time

Sold in packs of 10

£13.00

Why Choose the Mersen FR14AR69V12 Protistor® Semiconductor Fuse?

The Mersen FR14AR69V12 is a high speed aR semiconductor fuse engineered to provide short circuit protection for sensitive power semiconductor devices. As part of the proven Mersen Protistor® 14×51 aR series, this fuse delivers rapid fault interruption to protect components such as IGBTs, thyristors, diodes and rectifiers used in industrial power conversion and automation systems.

Designed for demanding industrial applications, the FR14AR69V12 offers exceptional current limiting performance and a high breaking capacity to minimise damage during electrical faults. Its compact cylindrical construction allows straightforward installation in compatible fuse holders while providing dependable protection for valuable semiconductor equipment.

With a rated current of 12 A, a 690 V AC IEC / 700 V AC UL voltage rating and a 14 × 51 mm cylindrical body, the Mersen FR14AR69V12 is ideally suited for industrial drives, inverters, UPS systems and power conversion equipment requiring fast semiconductor protection.

Key Advantages

  • High speed aR semiconductor protection fuse.
  • 12 A current rating for industrial power electronics.
  • 690 V AC IEC / 700 V AC UL voltage rating.
  • 160 kA breaking capacity for reliable fault interruption.
  • Excellent current limiting characteristics reduce semiconductor stress.
  • Compact 14 × 51 mm cylindrical format for easy installation.

Key Features

  • Mersen Protistor® high speed fuse series.
  • 12 A rated current.
  • 690 V AC IEC / 700 V AC UL rated voltage.
  • aR operating class for semiconductor short circuit protection.
  • 14 × 51 mm ceramic cylindrical body.
  • 160 kA AC breaking capacity.
  • Silver-plated copper ferrule terminals.
  • IEC 60269-4 and UL recognised.

Reliable Protection for Semiconductor Equipment

The Mersen FR14AR69V12 is specifically designed to provide short circuit protection for semiconductor devices where rapid fault interruption is essential. Its low energy let-through characteristics help reduce thermal and mechanical stress on expensive power electronic components, improving overall system reliability.

Protistor® aR semiconductor fuses are widely specified by equipment manufacturers for industrial automation, renewable energy systems, motor drives and power conversion equipment requiring dependable protection against high fault currents.

Typical Applications

  • Variable frequency drives.
  • Industrial inverters.
  • UPS systems.
  • Power converters.
  • Motor control equipment.
  • Industrial automation systems.

Technical Specifications

Item number L1027328
Catalogue No FR14AR69V12
Description High-Speed Cylindrical Fuse Protistor® Size 14x51 aR 690VAC IEC 12A
EAN/UPC Code 3605340531428
Rated voltage AC IEC 690 V
Ampere Rating 12 A
RoHS Compliant Yes
AC or DC AC
Speed/Characteristic aR
Fuse Size 14x51
Mounting Clip
Clearing I2t At Rated Voltage 55 A²s
Melting I2t 5.4 A²s
AC Max I.R./Breaking Capacity I1: 160 kA
Connection/Terminal Material Silver-Plated Copper
Connection/Terminal Type Ferrule
Product Diameter 14.3 mm
Product Length 51 mm
Sell Pack Quantity 10 EA
Sell Pack Weight 0.2 kg
Sell Pack Width 75 mm
Sell Pack Length 107 mm
Sell Pack Height 16 mm
Product group Semiconductor Protection Fuses
Body/Insulating Material Ceramic
Product Weight 0.02 kg
Power Dissipation at Rated Current Value 4 W
HS Code 85361050
Country of Manufacture Tunisia
Fuse Type Semiconductor
Fuse Size 14x51 mm
Fuse Class aR
Voltage 690 V

Frequently Asked Questions

What is the Mersen FR14AR69V12 used for?

The FR14AR69V12 protects power semiconductor devices such as IGBTs, thyristors, diodes and rectifiers against short circuit faults.

What is the current rating of this fuse?

The fuse has a rated current of 12 A.

What voltage is the FR14AR69V12 rated for?

The fuse is rated for 690 V AC (IEC) and 700 V AC (UL) applications.

What does the aR operating class mean?

The aR classification indicates that the fuse provides high speed short circuit protection for semiconductor devices and should be used alongside appropriate overload protection where required.

Does the FR14AR69V12 include a striker indicator?

No. This version does not include a striker indicator. The corresponding model with a striker is the FR14AR69V12T.

Trusted by Industrial Engineers Worldwide

Mersen Protistor® semiconductor fuses are trusted worldwide for delivering rapid fault interruption, outstanding current limitation and dependable protection for critical power 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…

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...