Why Choose the Mersen R076306 Protistor High-Speed Fuse?
The Mersen R076306, catalogue number FD27GB66V50T, is a high-speed cylindrical semiconductor fuse designed to protect sensitive DC power electronic equipment against overloads and short-circuit faults. Part of the Mersen Protistor® 27 × 60 mm gR (gRB) series, it delivers dependable protection for railway power systems, industrial converters and auxiliary DC circuits.
Developed specifically for modern DC applications, this fuse offers low let-through energy, reduced power losses and excellent performance at elevated operating temperatures. These characteristics help minimise damage to semiconductor devices while improving system reliability and extending equipment life.
With a rated current of 50 A, a 660 V DC IEC rating and a 50 kA breaking capacity, the R076306 is ideal for protecting converters, rectifiers, inverters and railway auxiliary power equipment. Its integrated striker provides convenient fuse status indication for compatible monitoring systems.
Key Advantages
- High-speed gR semiconductor fuse for full-range DC protection.
- 50 A rated current for industrial power electronic applications.
- 660 V DC IEC voltage rating.
- Low I²t performance helps minimise semiconductor damage.
- 50 kA DC breaking capacity.
- Integrated striker indicator for fuse monitoring.
- Low power dissipation improves operating efficiency.
- Designed for demanding railway and industrial DC environments.
Key Features
- Mersen Protistor® high-speed fuse series.
- Manufacturer item number R076306.
- Catalogue number FD27GB66V50T.
- 50 A rated current.
- 660 V DC IEC rated voltage.
- gR utilisation characteristic.
- gRB design for semiconductor protection.
- Integrated striker indication.
- 27 × 60 mm cylindrical fuse.
- Silver-plated copper ferrule terminals.
- Clip mounting installation.
- RoHS compliant.
Reliable Protection for High-Performance DC Systems
Semiconductor fuses are designed to interrupt fault currents extremely quickly, limiting the amount of energy that reaches sensitive electronic components. The Mersen R076306 helps protect IGBTs, diodes, thyristors and other semiconductor devices from catastrophic damage caused by overloads and short circuits.
Its compact cylindrical design, integrated striker and proven Protistor® technology make it an excellent choice for railway applications, industrial converters and DC power distribution systems requiring dependable high-speed protection.
Typical Applications
- Railway traction and auxiliary circuits.
- Industrial DC converters.
- Power semiconductor protection.
- Rectifiers and inverters.
- Battery energy storage systems.
- Industrial automation equipment.
- Renewable energy power conversion.
- DC control and distribution systems.
