Why Choose the Mersen Q087345 Protistor High-Speed Fuse?
The Mersen Q087345, catalogue number FD20GC150V20T, is a high-speed cylindrical semiconductor fuse engineered to provide reliable protection for sensitive DC power electronics. As part of the renowned Mersen Protistor® 20 × 190 mm gR (gRC) series, it is specifically designed to safeguard semiconductors, converters and railway DC equipment from damaging fault currents while maintaining system reliability.
Developed for demanding high-voltage DC applications, this fuse offers rapid fault interruption with low let-through energy, helping minimise damage to expensive semiconductor components. Its robust ceramic construction and integrated striker make it suitable for monitoring and fuse indication systems used in critical industrial installations.
With a rated current of 20 A, a 1500 V DC IEC voltage rating and a 60 kA breaking capacity, the Q087345 is ideal for railway traction equipment, power converters, inverters, battery energy storage systems and other high-performance DC installations requiring dependable semiconductor protection.
Key Advantages
- High-speed gR semiconductor fuse providing full-range protection.
- 20 A current rating for DC power electronic applications.
- 1500 V DC IEC rating for modern high-voltage systems.
- Integrated striker indicator for remote fuse monitoring.
- Low I²t values help protect expensive semiconductor devices.
- Low power dissipation improves system efficiency.
- Designed for long service life in demanding industrial environments.
- Suitable for railway and industrial DC power applications.
Key Features
- Mersen Protistor® high-speed fuse series.
- Catalogue number FD20GC150V20T.
- 20 A rated current.
- 1500 V DC IEC rated voltage.
- gR (gRC) semiconductor protection characteristic.
- Integrated striker for fuse indication.
- 20 × 190 mm cylindrical format.
- Ceramic body with ferrule terminals.
- Maximum DC breaking capacity of 60 kA.
- RoHS compliant.
Reliable Protection for DC Power Electronics
High-speed semiconductor fuses are specifically designed to interrupt fault currents before sensitive power electronic devices can suffer permanent damage. Their low let-through energy helps protect expensive components such as IGBTs, diodes and thyristors from catastrophic failure during short circuits.
The Mersen Protistor® range is trusted throughout the railway, renewable energy and industrial automation sectors, delivering dependable protection for converters, inverters and auxiliary DC systems operating under demanding electrical conditions.
Typical Applications
- Railway traction and auxiliary DC circuits.
- Industrial DC converters.
- Power semiconductor protection.
- Battery energy storage systems.
- Renewable energy converters.
- Industrial drives and inverters.
- Rectifier equipment.
- Power distribution and control systems.
