Why Choose the Mersen F089475 Protistor® High-Speed Fuse?
The Mersen F089475 is a high-performance Protistor® cylindrical semiconductor fuse developed to protect sensitive power electronic equipment operating in high-voltage DC systems. With a rated current of 25 A and a voltage rating of 1500 V DC, it provides rapid fault interruption to help minimise damage to semiconductor components during short-circuit conditions.
Part of the Mersen Protistor® 20 × 190 mm gR (gRC) series, the F089475 is engineered with low let-through energy, reduced power losses and dependable performance at elevated operating temperatures. These characteristics make it particularly suitable for modern DC equipment where conventional circuit protection may not operate quickly enough to safeguard sensitive devices.
The F089475 is designed for demanding semiconductor protection duties, including railway power and auxiliary circuits, industrial converters and other high-power DC installations. Its cylindrical format supports straightforward integration into compatible fuse holders within electrical cabinets and power conversion equipment.
Key Advantages
- High-speed gR (gRC) semiconductor protection fuse.
- 25 A rated current for power electronic circuits.
- 1500 V DC voltage rating for high-voltage DC systems.
- Low I²t performance helps limit damage to protected components.
- Reduced power losses support efficient equipment operation.
- Designed for reliable performance in demanding DC applications.
Key Features
- Mersen Protistor® semiconductor fuse series.
- 25 A rated current.
- 1500 V DC rated voltage.
- gR (gRC) high-speed operating class.
- 20 × 190 mm cylindrical fuse format.
- Low let-through energy during short-circuit conditions.
- Suitable for elevated operating temperatures.
- Developed for high-performance DC semiconductor protection.
High-Speed Protection for Modern DC Equipment
Semiconductor components can be damaged by fault currents before conventional protective devices have time to operate. High-speed fuses such as the Mersen F089475 are designed to interrupt these currents rapidly, reducing the thermal and electrical energy transferred to components such as diodes, thyristors and power transistor modules.
The Protistor® range is developed for modern power conversion equipment that may operate at high voltages and elevated temperatures. Its low I²t characteristics and reduced watt losses help provide effective circuit protection while supporting system efficiency and long-term equipment reliability.
Typical Applications
- Railway power and auxiliary circuits.
- Industrial DC power converters.
- Traction and transportation equipment.
- Battery energy storage systems.
- High-voltage DC distribution equipment.
- Industrial inverters and rectifiers.
- Protection of diodes, thyristors and power semiconductor modules.
