Why Choose the Mersen T078332 Protistor® High-Speed Fuse?
The Mersen T078332 is a Protistor® high-speed cylindrical semiconductor fuse manufactured as FR27UQ69V200T. It is designed to provide extremely fast short-circuit protection for sensitive semiconductor devices including IGBTs, SCRs, thyristors and power diodes used in industrial power electronic equipment. The fuse forms part of Mersen's proven URQ 27 × 60 mm range for demanding industrial applications.
Featuring an aR operating characteristic, the T078332 delivers partial-range semiconductor protection with exceptional current-limiting performance. Its integrated striker indicator provides rapid visual indication following fuse operation, helping reduce maintenance time and equipment downtime.
With a 200 A current rating, 690 V AC operating voltage, 27 × 60 mm cylindrical construction and an exceptionally high 200 kA breaking capacity, the T078332 is ideally suited to protecting modern variable speed drives, converters, UPS systems and industrial power supplies.
Key Advantages
- Genuine Mersen Protistor® semiconductor fuse.
- 200 A rated current.
- 690 V AC operating voltage.
- aR ultra-fast characteristic for semiconductor protection.
- Integrated striker indicator.
- 200 kA interrupt rating for high fault protection.
Key Features
- Manufacturer: Mersen.
- Model: T078332.
- Catalogue number: FR27UQ69V200T.
- Protistor® URQ semiconductor fuse.
- 27 × 60 mm cylindrical body.
- 200 A current rating.
- 690 V AC rated voltage.
- aR operating class.
- Built-in striker indicator.
- Designed for fuse holder installation.
Fast Protection for Power Semiconductor Equipment
Industrial semiconductor devices require extremely fast protection against high fault currents. The Mersen T078332 rapidly interrupts short-circuit faults before excessive thermal energy can damage expensive semiconductor components, helping improve equipment reliability while reducing maintenance costs.
The fuse is suitable for protecting power electronic equipment including variable frequency drives, UPS systems, rectifiers, converters and industrial power supplies operating within its rated electrical characteristics.
Typical Applications
- Variable speed drives (VSDs).
- Industrial inverters.
- UPS systems.
- Power converters.
- Rectifiers.
- Industrial automation equipment.
