The PC71UD13C250D1A fuse provides fast, reliable protection for power semiconductors in demanding industrial environments, supporting up to 250A at 1250VAC (IEC) and 1300VAC (UL). Features integrated striker for remote indication and superior safety.
£138.94
The Mersen F300546 (catalogue number PC71UD13C250D1A) is a premium Protistor® square body high-speed semiconductor protection fuse engineered to deliver exceptional protection for modern power electronic equipment. Designed specifically to safeguard IGBTs, thyristors, diodes and semiconductor modules, it provides ultra-fast fault interruption to minimise damage during short-circuit conditions.
As part of the trusted Mersen Protistor® Size 71 aR series, this fuse features low let-through energy (I²t), silver-plated contact surfaces and a robust ceramic square body construction. The integrated striker indicator enables remote status indication or operation of an optional microswitch, simplifying maintenance and improving system monitoring.
Rated at 250 A with an operating voltage of 1250 V AC (IEC) and 1300 V AC (UL), the F300546 is ideally suited for protecting high-power variable speed drives, converters, UPS systems, renewable energy equipment and industrial automation installations requiring dependable semiconductor protection.
The Mersen F300546 is designed to interrupt high fault currents before they can damage expensive semiconductor devices. Its extremely fast operating characteristics and low energy let-through help maximise equipment reliability while reducing maintenance costs and unplanned downtime.
This Protistor® fuse is widely used in industrial automation, renewable energy systems and power conversion equipment where dependable protection of semiconductor devices is essential for safe and reliable operation.
| Current | 11 A |
|---|---|
| Item number | F300546 |
| Catalogue No | PC71UD13C250D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 250A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340330045 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 250 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 71 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 72 kA²s |
| Melting I2t | 8.9 kA²s |
| AC Max I.R./Breaking Capacity | I1: 126 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | DIN 110 Blades |
| Product Width | 51 mm |
| Product Length | 133.4 mm |
| Product Height | 56.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.56 kg |
| Sell Pack Width | 142 mm |
| Sell Pack Length | 166 mm |
| Sell Pack Height | 62 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.52 kg |
| Power Dissipation at Rated Current Value | 61 W |
| HS Code | 85351000 |
The F300546 is a high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power electronic devices against damaging short-circuit currents.
This fuse has a 250 A current rating.
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL).
The aR characteristic identifies an ultra-fast semiconductor protection fuse designed specifically to protect power electronic devices from short-circuit faults.
The F300546 is commonly installed in industrial drives, power converters, renewable energy systems, UPS equipment and other high-power semiconductor applications.
Mersen Protistor® semiconductor fuses are trusted worldwide by electrical engineers, OEMs and industrial manufacturers for protecting high-value semiconductor equipment in demanding industrial applications.
● 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...