Why Choose the Mersen B089471 Protistor High-Speed Fuse?
The Mersen B089471 is a high-performance DC semiconductor fuse designed to protect sensitive power electronic components and high-voltage DC equipment against damaging overload and short-circuit currents. Part of Mersen's Protistor 20 × 190 mm fuse range, it provides rapid fault interruption for demanding railway, industrial and power conversion applications.
The B089471 is engineered for modern DC systems that operate at elevated voltages and temperatures. Its low pre-arcing I²t helps limit the electrical and thermal energy transferred to protected components during a fault, while reduced power losses support efficient operation and a long service life.
With a rated current of 10 A, a rated voltage of 1500 V DC and a cylindrical 20 × 190 mm format, the Mersen B089471 is suitable for protecting semiconductor devices in railway power circuits, auxiliary systems, converters and other high-voltage DC installations.
Key Advantages
- High-speed protection for sensitive semiconductor devices and DC power equipment.
- 1500 V DC voltage rating for high-voltage applications.
- 10 A rated current for compatible power electronic circuits.
- Low I²t performance helps minimise damage during short circuits.
- Reduced power losses support efficient and reliable system operation.
- Designed for demanding railway main and auxiliary power circuits.
Key Features
- Mersen Protistor high-speed cylindrical fuse series.
- 10 A rated current.
- 1500 V DC rated voltage.
- gR utilisation category for full-range semiconductor protection.
- gRC design for demanding DC power applications.
- Standard 20 × 190 mm cylindrical format.
- Designed for operation at elevated temperatures.
- Low watt losses and controlled fault energy.
Reliable Protection for High-Voltage DC Equipment
Power semiconductor devices can be damaged by extremely short overcurrent events. High-speed fuses interrupt these faults rapidly and limit the energy passed into connected equipment, helping protect converters, rectifiers, traction systems and other valuable power electronic components.
The Mersen B089471 is developed for new-generation DC equipment that may operate at higher temperatures than conventional electrical systems. Its combination of low I²t, reduced watt losses and rapid fault interruption makes it a dependable protection solution for critical industrial and railway installations.
Typical Applications
- Railway main power circuits.
- Railway auxiliary electrical systems.
- DC power converters and rectifiers.
- Industrial traction equipment.
- Power semiconductor protection.
- High-voltage DC distribution systems.
