Why Choose the Mersen A089470 Protistor High-Speed Fuse?
The Mersen A089470 is a high-performance DC semiconductor fuse designed to protect sensitive power electronic equipment against damaging overload and short-circuit currents. Part of Mersen's advanced Protistor 20 × 190 mm fuse range, it provides rapid fault interruption for railway, industrial and power conversion systems.
The A089470 is engineered for modern DC equipment operating at elevated voltages and temperatures. Its low pre-arcing I²t helps reduce the electrical and thermal energy passed to protected components during a fault, while its low power losses contribute to efficient operation and an extended service life.
With a rated current of 8 A, a rated voltage of 1500 V DC and a cylindrical 20 × 190 mm format, the Mersen A089470 is ideal for protecting semiconductor devices in railway power circuits, auxiliary systems, converters and other high-voltage DC applications.
Key Advantages
- High-speed protection for sensitive semiconductor devices and DC power equipment.
- 1500 V DC voltage rating for high-voltage applications.
- 8 A rated current for compatible power electronic circuits.
- Low I²t performance helps minimise damage during short circuits.
- Reduced power losses support efficient system operation.
- High breaking capacity provides dependable interruption of severe DC faults.
Key Features
- Mersen Protistor high-speed cylindrical fuse series.
- 8 A rated current.
- 1500 V DC rated voltage.
- gR utilisation category for full-range semiconductor protection.
- gRC design for demanding DC power applications.
- Compact 20 × 190 mm cylindrical format.
- Clip-mounted design for compatible fuse holders.
- Maximum DC breaking capacity of 60 kA.
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 A089470 is specifically developed for new-generation DC equipment that may operate at higher temperatures than conventional electrical systems. Its combination of low I²t, low watt losses and high breaking capacity makes it a reliable protection solution for demanding 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.
