Why Choose the Mersen FR27GB80V50T Protistor® High-Speed Fuse?
The Mersen A221444 (FR27GB80V50T) is a high-performance Protistor® high-speed cylindrical semiconductor fuse with striker, designed to provide complete protection for sensitive power semiconductor devices in demanding industrial applications. Featuring a gR operating characteristic, this fuse delivers both overload and short-circuit protection, making it ideal for safeguarding IGBTs, thyristors, diodes and other semiconductor components used in modern power conversion equipment.
As part of Mersen's trusted Protistor® 27 × 60 mm gR (gRB) 800 VAC range, the FR27GB80V50T combines a compact cylindrical design with a high interrupting capacity and low let-through energy. The integrated mechanical striker provides reliable fuse operation indication, allowing compatible fuse holders and monitoring systems to quickly identify blown fuses and reduce maintenance time.
With a 50 A current rating, 800 V AC IEC voltage rating and full-range gR semiconductor protection, the A221444 is well suited to variable frequency drives, UPS systems, industrial converters, motor drives and renewable energy equipment.
Key Advantages
- High-speed gR fuse for full-range semiconductor protection.
- 50 A rated current for industrial power electronics.
- 800 V AC IEC voltage rating.
- Integrated mechanical striker for fuse status indication.
- Low I²t reduces stress on sensitive semiconductor devices.
- Compact 27 × 60 mm cylindrical design for standard fuse holders.
Key Features
- Mersen Protistor® semiconductor protection fuse.
- Catalogue number: FR27GB80V50T.
- Item number: A221444.
- 50 A rated current.
- 800 V AC IEC rated voltage.
- gR (gRB) utilisation category for full-range semiconductor protection.
- Integrated mechanical striker indicator.
- 27 × 60 mm cylindrical fuse.
- High interrupting capacity of 90 kA.
- RoHS compliant.
Reliable Protection for Power Electronics
The Mersen FR27GB80V50T is engineered to rapidly interrupt overload and fault currents before damaging energy reaches sensitive semiconductor devices. Its full-range gR operating characteristic protects both overload and short-circuit conditions, helping maximise equipment reliability while reducing maintenance and replacement costs.
Protistor® semiconductor fuses are widely used in industrial automation, renewable energy systems, UPS equipment, motor drives and power conversion systems where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives.
- Industrial motor drives.
- Power converters and inverters.
- UPS systems.
- Renewable energy equipment.
- Industrial automation and control panels.
- Power semiconductor protection.
