Why Choose the Mersen G085911 Protistor® High-Speed Fuse?
The Mersen G085911 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 G085911 combines low I²t performance with reduced power losses and dependable operation at elevated temperatures. These characteristics make it particularly suitable for modern DC power conversion equipment where conventional protection may not operate quickly enough to safeguard valuable semiconductor components.
The fuse includes an integrated striker indicator, enabling clear mechanical indication or compatible remote signalling when the fuse operates. Its robust cylindrical construction and 60 kA DC breaking capacity make it ideal for railway power circuits, auxiliary systems, industrial converters and other critical DC installations.
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.
- 60 kA DC breaking capacity for dependable fault interruption.
- Low I²t performance helps limit damage to semiconductor components.
- Integrated striker supports local or remote fuse-operation indication.
Key Features
- Mersen Protistor® semiconductor fuse series.
- 32 A rated current.
- 1500 V DC rated operating voltage.
- gR characteristic with gRC design details.
- 20 × 190 mm cylindrical fuse format.
- Built-in striker indication mechanism.
- Clip mounting for compatible fuse holders.
- Low let-through energy during short-circuit conditions.
- Designed for elevated-temperature DC equipment.
- RoHS compliant.
High-Speed Protection for Critical DC Equipment
Power semiconductor devices can be permanently damaged by fault energy before conventional circuit protection has time to operate. The Mersen G085911 is engineered to interrupt short-circuit currents rapidly, reducing the electrical and thermal stress imposed on diodes, thyristors, IGBTs and other sensitive semiconductor modules.
Its high voltage rating, low I²t performance and striker indication make it particularly well suited to railway and industrial DC systems. By limiting fault energy and providing clear operating indication, the fuse helps improve system reliability, simplify maintenance and reduce the risk of damage to expensive power electronic equipment.
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 and power conversion equipment.
- Protection of diodes, thyristors, IGBTs and semiconductor modules.
