High-speed Protistor® fuse delivering rapid and reliable circuit protection up to 450A at 1250VAC (IEC) and 1300VAC (UL) with a robust square body design and striker indication system.
£203.61
The Mersen M300506, catalogue number PC73UD13C450TF, is a premium Protistor® square body high speed semiconductor fuse designed to provide ultra-fast protection for sensitive power electronic equipment. Engineered specifically for semiconductor applications, it protects IGBTs, thyristors, diodes and other power semiconductor devices against damaging short circuits in demanding industrial environments.
Featuring a 450 A current rating, 1250 V AC IEC / 1300 V AC UL voltage rating and an aR operating class, the M300506 delivers exceptional fault interruption performance while limiting let-through energy to safeguard expensive electronic components. Its robust square body construction and high breaking capacity make it ideal for industrial power conversion systems.
The fuse incorporates a Size 73 square body design with flush end metric threaded terminals and an integrated striker indicator, enabling straightforward installation into compatible fuse holders and remote monitoring systems used throughout industrial electrical installations.
High speed semiconductor fuses are engineered to interrupt fault currents before they can damage expensive power electronic components. Their ultra-fast operating characteristics reduce thermal stress, improve equipment reliability and help minimise costly downtime in industrial systems.
The Mersen M300506 is widely specified for industrial power conversion equipment where dependable semiconductor protection is essential for maintaining safe and efficient operation.
| Item number | M300506 |
|---|---|
| Catalogue No | PC73UD13C450TF |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 450A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340329483 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 450 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 73 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 290 kA²s |
| Melting I2t | 35.5 kA²s |
| AC Max I.R./Breaking Capacity | I1: 126 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Brass |
| Connection/Terminal Type | Flush ends |
| Product Width | 73 mm |
| Product Length | 74 mm |
| Product Height | 78.5 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 1.22 kg |
| Sell Pack Width | 110 mm |
| Sell Pack Length | 125 mm |
| Sell Pack Height | 75 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.22 kg |
| Power Dissipation at Rated Current Value | 99 W |
| HS Code | 85351000 |
The M300506 is an ultra-fast semiconductor fuse designed to protect IGBTs, thyristors, diodes and other semiconductor devices from damaging short circuit faults.
The fuse has a 450 A rated current.
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL) applications.
The aR classification provides ultra-fast short circuit protection specifically for semiconductor devices while overload protection is provided elsewhere within the electrical installation.
The M300506 is commonly installed in industrial drives, power converters, UPS systems, renewable energy equipment and other high power electronic systems.
Mersen Protistor® semiconductor fuses are trusted worldwide by electrical engineers, OEM manufacturers and panel builders to provide reliable protection for critical industrial 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.
● 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...