High-speed Protistor® fuse delivering reliable protection for sensitive power electronics operating at up to 1250VAC and 1100A, with striker flush ends, metric threads, and Omega connection.
£439.28
The Mersen B300726 is a premium square body high-speed semiconductor fuse engineered to provide maximum protection for modern power conversion equipment. Part of the trusted Mersen Protistor® Size 2x72 series, this fuse is specifically designed to protect sensitive semiconductor devices including IGBTs, thyristors and power diodes operating in demanding industrial applications.
Designed with an ultra-fast aR operating characteristic, the B300726 rapidly interrupts short-circuit currents before excessive energy can damage valuable semiconductor components. Its solidified sand construction, silver-plated contact surfaces, non-magnetic hardware and integrated striker indicator deliver reliable protection and long operational life.
With a 1100 A rated current and a 1250 V AC IEC voltage rating, the Mersen B300726 is ideally suited for protecting high-power drives, converters, UPS systems, renewable energy equipment and industrial power conversion systems requiring dependable semiconductor protection.
High-speed semiconductor fuses are designed to interrupt fault currents before they can damage expensive semiconductor devices. Their low let-through energy improves equipment reliability, reduces maintenance costs and extends the service life of industrial power conversion equipment.
The Mersen Protistor® Size 2x72 range provides dependable protection for inverters, motor drives, UPS systems and similar industrial equipment. Its advanced construction delivers superior cycling capability together with reliable short-circuit protection for today's high-power semiconductor applications.
| Item number | B300726 |
|---|---|
| Catalogue No | PC272UD13C11CTF |
| Description | Square Body High-Speed Fuse Protistor® Size 2x72 aR 1250VAC IEC 1100A With Striker Flush ends metric threads With Omega connection |
| EAN/UPC Code | 3605340332711 |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 1100 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 2x72 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 2185 kA²s |
| Melting I2t | 272 kA²s |
| AC Max I.R./Breaking Capacity | I1: 100 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Brass |
| Connection/Terminal Type | Flush ends |
| Product Width | 138.5 mm |
| Product Length | 91 mm |
| Product Height | 65.5 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 1.698 kg |
| Sell Pack Width | 90 mm |
| Sell Pack Length | 205 mm |
| Sell Pack Height | 95 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.698 kg |
| Power Dissipation at Rated Current Value | 231 W |
| HS Code | 85351000 |
| Country of Manufacture | France |
The B300726 protects semiconductor devices including IGBTs, thyristors and power diodes from damaging short-circuit currents in industrial power conversion equipment.
This fuse has a 1100 A rated current.
It is rated for 1250 V AC (IEC).
The fuse features flush end metric threaded terminals with an Omega connection together with an integrated striker indicator.
It is commonly installed in industrial drives, converters, UPS systems, renewable energy installations and other semiconductor-based power conversion equipment.
Mersen Protistor® semiconductor fuses are trusted worldwide to provide dependable ultra-fast protection for valuable power electronic equipment operating in demanding industrial 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.
● frequently asked questions
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.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
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.
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.
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.
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
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.
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...
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...