Why Choose the Mersen R098593 Protistor High-Speed Fuse?
The Mersen R098593, catalogue number FD27GB66V4T, is a high-speed cylindrical semiconductor fuse designed to protect sensitive DC power electronic equipment against damaging overloads and short-circuit currents. Part of the Mersen Protistor® 27 × 60 mm gR (gRB) series, it is developed for railway power systems, auxiliary circuits and industrial DC applications requiring rapid and dependable fault interruption.
This fuse-link provides low let-through energy to help minimise thermal and mechanical damage to semiconductor components during electrical faults. Its low power dissipation and suitability for operation at elevated temperatures support improved reliability, longer service life and efficient performance in demanding electrical installations.
With a rated current of 4 A, a rated voltage of 660 V DC and a maximum DC breaking capacity of 50 kA, the R098593 is suitable for protecting converters, rectifiers, inverters and railway auxiliary equipment. Its integrated striker provides mechanical fuse operation indication for compatible signalling and monitoring systems.
Key Advantages
- High-speed gR semiconductor fuse for full-range DC protection.
- 4 A rated current for sensitive power electronic circuits.
- 660 V DC IEC voltage rating for industrial and railway systems.
- Low I²t performance helps minimise semiconductor damage during faults.
- Maximum DC breaking capacity of 50 kA.
- Integrated striker indicator supports fuse status monitoring.
- Low power dissipation helps improve system efficiency.
- Compact cylindrical construction simplifies installation.
Key Features
- Mersen Protistor® high-speed fuse series.
- Manufacturer item number R098593.
- Catalogue number FD27GB66V4T.
- 4 A rated current.
- 660 V DC IEC rated voltage.
- gR speed and utilisation characteristic.
- gRB design for semiconductor protection.
- Integrated striker for fuse operation indication.
- 27 × 60 mm cylindrical fuse format.
- Silver-plated copper ferrule terminals.
- Clip-mounting configuration.
- RoHS-compliant construction.
Reliable Protection for DC Semiconductor Circuits
Power semiconductor components can be permanently damaged within milliseconds when exposed to excessive fault current. The Mersen R098593 is engineered to interrupt these currents rapidly, limiting the electrical energy transferred to protected devices and reducing the risk of damage to converters, rectifiers and associated control equipment.
Its gR characteristic provides full-range protection against overload and short-circuit currents. Combined with its compact ceramic body, low power loss and integrated striker, the fuse is well suited to railway auxiliary circuits and industrial DC systems where reliable protection and clear fuse status indication are required.
Typical Applications
- Railway power and auxiliary circuits.
- Industrial DC converters.
- Semiconductor rectifier assemblies.
- Power inverters and frequency converters.
- DC control and signalling equipment.
- Industrial automation panels.
- Battery-powered industrial systems.
- Equipment using diodes, thyristors or power transistors.
