Why Choose the Mersen R094085 Protistor High-Speed Fuse?
The Mersen R094085, catalogue number FD14GB44V12T, is a high-speed cylindrical semiconductor fuse engineered to protect sensitive DC power electronic equipment against overloads and short-circuit faults. As part of the Mersen Protistor® 14 × 51 mm gLB series, it is specifically designed for industrial DC systems, railway auxiliary circuits and power conversion equipment requiring rapid fault interruption and dependable semiconductor protection.
Designed with low let-through energy and excellent current-limiting characteristics, the R094085 helps minimise thermal and mechanical stress on semiconductor devices during fault conditions. Its compact cylindrical construction and integrated striker make it easy to install and monitor within modern industrial control systems.
With a rated current of 12 A, a 440 V DC IEC voltage rating and an exceptionally high 100 kA DC breaking capacity, this Protistor fuse is ideal for protecting converters, rectifiers, inverters, UPS systems and traction auxiliary circuits where reliable semiconductor protection is essential.
Key Advantages
- High-speed gLB semiconductor fuse for DC power electronics.
- 12 A rated current for low-current protection applications.
- 440 V DC IEC voltage rating.
- 100 kA DC breaking capacity for outstanding fault protection.
- Integrated striker indicator for fuse monitoring.
- Low I²t helps protect valuable semiconductor devices.
- Compact 14 × 51 mm cylindrical design.
- Reliable operation in demanding industrial environments.
Key Features
- Mersen Protistor® high-speed fuse series.
- Manufacturer item number R094085.
- Catalogue number FD14GB44V12T.
- 12 A rated current.
- 440 V DC IEC rated voltage.
- gLB utilisation characteristic.
- Integrated striker indication.
- 14 × 51 mm cylindrical fuse format.
- Silver-plated copper ferrule terminals.
- Clip-mounting installation.
- RoHS compliant.
Reliable Protection for DC Power Electronics
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before excessive thermal energy can damage sensitive power electronic components. Their fast operation helps extend equipment life while reducing costly downtime caused by semiconductor failures.
The Mersen R094085 combines a compact footprint, high interrupting capacity and integrated striker indication, making it suitable for demanding industrial applications including rectifiers, inverters, UPS equipment, reduced-voltage motor starters and railway auxiliary power systems.
Typical Applications
- Industrial rectifiers.
- Power inverters.
- UPS systems.
- Traction auxiliary circuits.
- Reduced-voltage motor starters.
- Industrial DC converters.
- Power semiconductor protection.
- Industrial automation equipment.
