The PC71UD13C400PA fuse delivers superior protection for critical power electronics, engineered for rapid response to overloads in high-voltage systems up to 1250VAC IEC and 1300VAC UL. Its 400A rating and aR characteristic ensure reliable safeguarding of semiconductors against damaging overcurrents, minimising costly downtime.
£187.43
The Mersen Q301222 (PC71UD13C400PA) is a premium square body semiconductor protection fuse designed to provide ultra-fast protection for modern power electronic equipment. As part of the trusted Mersen Protistor® Size 71 series, this aR high-speed fuse delivers reliable protection for diodes, thyristors, IGBTs and other semiconductor devices used in industrial power conversion applications.
Engineered for demanding industrial environments, the Q301222 provides exceptional current limitation and low let-through energy, helping minimise damage during short-circuit faults. Its ceramic body, silver-plated contacts and integrated striker indicator ensure dependable long-term performance while simplifying maintenance and system monitoring.
With a 400 A current rating and a 1250 V AC IEC / 1300 V AC UL voltage rating, the Mersen Q301222 is ideally suited for variable speed drives, industrial inverters, UPS systems, renewable energy installations and other high-power semiconductor applications.
High-speed semiconductor fuses are engineered to interrupt fault currents before sensitive electronic components can be damaged. Their ultra-fast response and exceptionally low let-through energy provide superior protection compared with conventional industrial fuses, helping maximise equipment reliability while reducing costly downtime.
The Protistor® range from Mersen is trusted globally across industrial automation, renewable energy, UPS systems and power conversion equipment where dependable semiconductor protection is essential for safe and continuous operation.
| Item number | Q301222 |
|---|---|
| Catalogue No | PC71UD13C400PA |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 400A With Striker Plain Blades |
| EAN/UPC Code | 3605340338362 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 400 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 71 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 308 kA²s |
| Melting I2t | 38 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 | Plain Blades |
| Product Width | 51 mm |
| Product Length | 149.4 mm |
| Product Height | 56.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.68 kg |
| Sell Pack Width | 140 mm |
| Sell Pack Length | 170 mm |
| Sell Pack Height | 70 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.56 kg |
| Power Dissipation at Rated Current Value | 80 W |
| HS Code | 85351000 |
The Mersen Q301222 is designed to protect high-value semiconductor devices such as IGBTs, thyristors and diodes from damaging short-circuit currents.
The fuse has a 400 A rated current.
It is rated for 1250 V AC (IEC) and 1300 V AC (UL).
The aR classification identifies an ultra-fast semiconductor protection fuse designed specifically to interrupt short-circuit faults while allowing normal operating currents.
It is commonly installed in industrial drives, power converters, UPS systems, renewable energy installations and other high-power semiconductor equipment.
Mersen Protistor® semiconductor fuses are trusted by OEMs, panel builders and industrial engineers worldwide to provide dependable protection for critical 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...