Why Choose the Mersen K078025 High-Speed Semiconductor Fuse?
The Mersen K078025 is a high-performance Protistor® high-speed cylindrical fuse developed to protect sensitive semiconductor devices and DC power circuits against damaging overcurrents and short circuits. Identified by catalogue number FD36GD150V100, it is part of Mersen’s 36 × 190 mm gR semiconductor fuse range for demanding industrial and railway applications.
This fuse-link provides a fast operating response and low let-through energy, helping to reduce thermal and mechanical stress on power electronic components. Its characteristics make it particularly suitable for protecting converters, rectifiers, traction equipment and auxiliary DC circuits where conventional industrial fuses may not operate quickly enough to prevent semiconductor damage.
With a rated current of 100 A and an IEC voltage rating of 1500 V DC, the Mersen K078025 supports modern high-voltage DC equipment. Its robust cylindrical construction and 36 × 190 mm format provide dependable performance in installations exposed to elevated operating temperatures and demanding electrical conditions.
Key Advantages
- High-speed semiconductor fuse designed for DC power applications.
- 100 A rated current for industrial power electronic circuits.
- 1500 V DC IEC voltage rating for high-voltage systems.
- Low I²t performance helps minimise damage to protected semiconductor components.
- Reduced power losses support efficient and reliable system operation.
- Developed for demanding railway, conversion and auxiliary power circuits.
Key Features
- Mersen Protistor® semiconductor fuse range.
- FD36GD150V100 catalogue number.
- 100 A rated current.
- 1500 V DC rated voltage.
- gR semiconductor protection characteristic.
- gRD cylindrical fuse design.
- 36 × 190 mm fuse-link format.
- Fast fault interruption with low let-through energy.
- Designed for operation in elevated-temperature environments.
- RoHS-compliant construction.
Reliable Protection for High-Voltage DC Equipment
Power semiconductor devices can be damaged by extremely short overcurrent events. High-speed fuses such as the Mersen K078025 are engineered to interrupt these faults rapidly, limiting the electrical energy that reaches protected components such as diodes, thyristors, IGBTs and rectifier assemblies.
The Mersen Protistor® DC range is designed to provide improved performance for modern DC equipment. Its low I²t characteristics, reduced watt losses and ability to operate at elevated temperatures support reliable protection in railway traction, industrial conversion and high-voltage auxiliary power systems.
Typical Applications
- Railway traction power equipment.
- Railway auxiliary DC circuits.
- Industrial power converters and rectifiers.
- High-voltage DC distribution systems.
- Semiconductor and power electronic protection.
- Battery energy storage and charging equipment.
