Why Choose the Mersen C089472 Protistor High-Speed Fuse?
The Mersen C089472 is a high-performance DC semiconductor fuse developed to protect sensitive power electronic components and high-voltage direct-current equipment against damaging overcurrent and short-circuit conditions. Part of Mersen's advanced Protistor 20 × 190 mm range, it provides rapid fault interruption for demanding railway, industrial and power conversion applications.
The C089472 is designed for modern DC systems that may operate at higher temperatures than conventional electrical equipment. Its low pre-arcing I²t helps minimise the electrical and thermal energy transferred to protected components during a fault, while reduced power losses contribute to efficient operation and an extended service life.
With a rated current of 12 A, a rated voltage of 1500 V DC and a cylindrical 20 × 190 mm format, the Mersen C089472 is suitable for protecting semiconductor devices in railway power circuits, auxiliary systems, converters and other critical high-voltage DC installations.
Key Advantages
- High-speed protection for sensitive semiconductor devices and DC power equipment.
- 1500 V DC voltage rating for high-voltage direct-current applications.
- 12 A rated current for compatible power electronic circuits.
- Low I²t performance helps minimise component damage during short circuits.
- Reduced power losses support efficient and reliable system operation.
- Designed for demanding railway power and auxiliary circuits.
Key Features
- Mersen Protistor high-speed cylindrical fuse series.
- 12 A rated current.
- 1500 V DC rated voltage.
- gR utilisation category for full-range semiconductor protection.
- gRC design for demanding DC power applications.
- Standard 20 × 190 mm cylindrical construction.
- Low pre-arcing I²t for effective fault-energy limitation.
- Developed for elevated-temperature DC equipment.
Reliable Protection for High-Voltage DC Equipment
Power semiconductor devices can be damaged by fault currents that develop too quickly for conventional general-purpose fuses to interrupt effectively. High-speed semiconductor fuses limit the energy passed into connected equipment, helping protect converters, rectifiers, traction systems and other valuable power electronic components.
The Mersen C089472 combines rapid fault interruption with low watt losses and dependable performance at elevated operating temperatures. Its gR characteristic provides full-range semiconductor protection against overload and short-circuit currents when correctly selected and coordinated with the electrical system.
Typical Applications
- Railway main power circuits.
- Railway auxiliary electrical systems.
- High-voltage DC converters and rectifiers.
- Industrial traction equipment.
- Power semiconductor protection.
- DC power distribution and conversion systems.
