Call Us Today
01706 242050
Trade Portal
MERSEN FUSE 6,9 URY 17 P 100 BS17UY69V100P

MERSEN FUSE 6,9 URY 17 P 100 BS17UY69V100P

British Standard fuse-link Protistor® 17×49 aR 690VAC IEC 100A With Striker, providing rapid semiconductor protection with integrated striker indication.

SKU: E221264Alt SKU: BS17UY69V100PMPN: E221264
Price
List Price £96.55 ex VAT
Your Price (ex VAT)
£96.55
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) £96.55
Trade pricing is personalised to your account

Manufacturer Lead Time

Sold in packs of 10

£96.55

Why Choose the Mersen E221264 Protistor® BS88-4 Semiconductor Fuse?

The Mersen E221264 (catalogue number BS17UY69V100P) is a high-speed Protistor® BS88-4 semiconductor fuse-link designed to provide exceptional protection for power semiconductors including diodes, thyristors, GTOs and IGBT devices. Manufactured to IEC 60269-1, IEC 60269-4 and BS88-4 standards, it delivers reliable current-limiting protection for demanding industrial power electronics applications.

Featuring a 690VAC rating, 100A current rating and an integrated striker indicator, the E221264 is ideal for protecting variable speed drives, UPS systems, inverters and other semiconductor-based equipment. Its pure silver fuse elements and high breaking capacity provide rapid fault clearance while minimising energy let-through to sensitive electronic components.

Key Advantages

  • Genuine Mersen Protistor® semiconductor protection fuse.
  • 690VAC IEC rated with 100A current rating.
  • High-speed aR operating characteristic for semiconductor protection.
  • Integrated striker provides remote fuse operation indication.
  • Very high breaking capacity for demanding industrial applications.
  • Low I²t limits damage to expensive power semiconductors.
  • Manufactured to IEC 60269-1, IEC 60269-4 and BS88-4 standards.

Key Features

  • Manufacturer: Mersen
  • Series: Protistor® BS88-4
  • Catalogue number: BS17UY69V100P
  • Manufacturer part number: E221264
  • Fuse size: 17 × 49 mm
  • Rated voltage: 690VAC
  • Rated current: 100A
  • Operating class: aR semiconductor protection
  • Integrated striker indication.
  • Current limiting, ultra-fast operation.

Typical Applications

  • Variable speed drives (VSDs).
  • Industrial inverter systems.
  • UPS equipment.
  • Semiconductor converters.
  • Motor drive systems.
  • Power electronics.
  • Industrial automation equipment.
  • Protection of diodes, thyristors, GTOs and IGBTs.

Designed for Semiconductor Protection

Unlike conventional circuit protection devices, the Mersen Protistor® range is specifically engineered for semiconductor applications where extremely fast fault clearance is essential. The low let-through energy and current-limiting design help protect costly power electronic devices from catastrophic short-circuit faults whilst maintaining maximum equipment reliability.

Technical Specifications

Item number E221264
Catalogue No BS17UY69V100P
Description British Standard fuse-link Protistor® 17x49 aR 690VAC IEC 100A With Striker
EAN/UPC Code 3605340251661
Rated voltage AC IEC 690 V
Ampere Rating 100 A
RoHS Compliant Yes
AC or DC AC
Speed/Characteristic aR
Fuse Size 17x49
Mounting Bolted
Clearing I2t At Rated Voltage 3900 A²s
Melting I2t 625 A²s
AC Max I.R./Breaking Capacity I1: 200 kA
Indication System Yes
Indication System Type Striker
Connection/Terminal Material Copper
Connection/Terminal Type L Brackets
Product Diameter 18.5 mm
Product Width 27 mm
Product Length 77.2 mm
Product Height 24 mm
Sell Pack Quantity 10 EA
Sell Pack Weight 0.5 kg
Sell Pack Width 110 mm
Sell Pack Length 250 mm
Sell Pack Height 30 mm
Product group Semiconductor Protection Fuses
Body/Insulating Material Ceramic
Product Weight 0.05 kg
Power Dissipation at Rated Current Value 33 W
HS Code 85361090
Fuse Type Semiconductor
Fuse Size 17x49 mm
Fuse Class aR
Voltage 690 V

Frequently Asked Questions

What is the Mersen E221264?

The E221264 is a Protistor® BS88-4 high-speed semiconductor fuse-link rated at 690VAC and 100A with an integrated striker indicator for protecting power semiconductor devices.

What does the aR fuse classification mean?

aR fuses provide partial-range, ultra-fast protection specifically for semiconductor devices against short-circuit faults and are intended for use alongside suitable overload protection.

Which equipment is this fuse suitable for?

It is commonly used in variable speed drives, UPS systems, industrial inverters, power converters and other semiconductor-based industrial equipment.

What is the purpose of the striker?

The integrated striker provides mechanical indication of fuse operation and can be used to actuate compatible microswitches for remote monitoring.

What semiconductor devices does it protect?

The fuse is designed to protect diodes, thyristors, GTOs, IGBTs and other sensitive power semiconductor components.

Trusted Semiconductor Protection from Mersen

Mersen Protistor® high-speed fuses are trusted worldwide to protect critical power electronic equipment by delivering ultra-fast fault interruption, high breaking capacity and reliable semiconductor protection.

● 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...