Why Choose the Mersen G087245 Protistor® High-Speed Fuse?
The Mersen G087245 is a high-performance Protistor® cylindrical semiconductor fuse designed to provide rapid protection for sensitive power electronic components in high-voltage DC systems. Rated at 10 A and 1500 V DC, it interrupts damaging fault currents quickly to help minimise thermal and electrical stress on semiconductor devices.
Part of the Mersen Protistor® 20 × 190 mm gR (gRC) series, the G087245 is developed for demanding DC equipment operating at elevated temperatures. Its low I²t characteristics, reduced watt losses and high interrupting capacity help protect valuable components while supporting efficient, dependable system operation.
The fuse incorporates an integrated striker indicator, providing mechanical indication when the fuse has operated and supporting compatible remote signalling arrangements. Its robust cylindrical ceramic construction makes it suitable for railway power circuits, auxiliary systems, industrial converters and other critical DC power applications.
Key Advantages
- High-speed gR semiconductor protection characteristic.
- 10 A rated current for sensitive power electronic circuits.
- 1500 V DC rating for high-voltage DC applications.
- 60 kA interrupting capacity for dependable fault clearance.
- Low I²t performance helps minimise semiconductor damage.
- Integrated striker supports clear fuse-operation indication.
Key Features
- Mersen Protistor® semiconductor fuse series.
- 10 A rated current.
- 1500 V DC rated voltage.
- gR operating class with gRC design characteristics.
- 20 × 190 mm cylindrical fuse format.
- Integrated striker indication mechanism.
- Ferrule terminals for compatible clip-mounted fuse holders.
- Low let-through energy during short-circuit conditions.
- Reduced power losses and extended operational life.
- Designed for elevated-temperature DC equipment.
High-Speed Protection for Critical DC Equipment
Power semiconductor devices can be permanently damaged by fault energy before conventional protective equipment has time to respond. The Mersen G087245 is engineered to interrupt short-circuit currents rapidly, reducing the energy transferred to sensitive components such as diodes, thyristors, IGBTs and power transistor modules.
Its high DC voltage rating, low let-through energy and dependable striker indication make it particularly suitable for railway and industrial power systems. By reducing fault stress and providing clear operating indication, the fuse helps improve equipment reliability, simplify maintenance and extend the service life of valuable power electronic components.
Typical Applications
- Railway power and auxiliary circuits.
- Industrial DC power converters.
- Traction and transportation equipment.
- High-voltage rectifiers and inverters.
- Battery energy storage systems.
- DC distribution equipment.
- Protection of diodes, thyristors, IGBTs and semiconductor modules.
