Why Choose the Mersen G089476 Protistor® High-Speed Fuse?
The Mersen G089476 is a high-performance Protistor® cylindrical semiconductor fuse designed to protect sensitive power electronic components in demanding high-voltage DC systems. Rated at 32 A and 1500 V DC, it provides rapid fault interruption to help minimise thermal and electrical damage to semiconductor devices during short-circuit conditions.
Part of the Mersen Protistor® 20 × 190 mm gR (gRC) series, the G089476 delivers low I²t performance, reduced power losses and dependable operation at elevated temperatures. These characteristics make it especially suitable for modern DC equipment where conventional circuit protection may not respond quickly enough to safeguard valuable semiconductor components.
Developed for high-performance protection in railway power and auxiliary circuits, this IEC high-speed fuse is also suitable for industrial converters, rectifiers and other critical DC power systems. Its cylindrical format supports straightforward installation in compatible fuse holders within electrical cabinets and power conversion equipment.
Key Advantages
- High-speed gR semiconductor protection characteristic.
- 32 A rated current for power electronic circuits.
- 1500 V DC voltage rating for high-voltage applications.
- Low I²t performance helps minimise semiconductor damage.
- Reduced watt losses support efficient equipment operation.
- Designed for reliable performance at elevated temperatures.
Key Features
- Mersen Protistor® semiconductor fuse series.
- 32 A rated current.
- 1500 V DC rated operating voltage.
- gR operating class with gRC design characteristics.
- 20 × 190 mm cylindrical fuse format.
- Low let-through energy during short-circuit conditions.
- Lower power losses for improved system efficiency.
- Long operational life in demanding DC equipment.
- Developed for railway power and auxiliary circuits.
- Manufactured to IEC semiconductor fuse requirements.
High-Speed Protection for Critical DC Equipment
Power semiconductor components can be permanently damaged by short-circuit energy before conventional protective devices have time to respond. The Mersen G089476 is engineered to interrupt fault currents rapidly, reducing the thermal and electrical stress imposed on diodes, thyristors, IGBTs and other sensitive power semiconductor modules.
Its high DC voltage rating, low let-through energy and reduced power dissipation make it well suited to modern railway and industrial power systems. By limiting fault energy, the fuse helps improve equipment reliability, extend component service life and reduce the risk of costly damage to power electronic assemblies.
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.
