Why Choose the Mersen Q301222 Protistor® High-Speed Fuse?
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.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 400 A current rating for demanding industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Designed to protect IGBTs, thyristors, diodes and other semiconductor devices.
- Low I²t performance helps reduce equipment damage during faults.
- Integrated striker indicator for simplified maintenance and remote indication.
Key Features
- Mersen Protistor® Size 71 series.
- Catalogue number: PC71UD13C400PA.
- 400 A rated current.
- 1250 V AC (IEC) / 1300 V AC (UL).
- Ultra-fast aR operating characteristic.
- Square body fuse with plain blade terminals.
- Integrated striker indicator.
- Silver-plated contact surfaces with ceramic body construction.
Reliable Protection for Power Electronics
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.
Typical Applications
- Variable speed drives (VSDs).
- Industrial motor control systems.
- Power converters and inverters.
- UPS and backup power systems.
- Renewable energy equipment.
- Protection of IGBTs, thyristors, diodes and other semiconductor devices.
