Why Choose the Mersen Q078007 Protistor High-Speed Fuse?
The Mersen Q078007, catalogue number FD36GD150V80, is a high-speed cylindrical semiconductor fuse designed to protect sensitive DC power electronics against damaging short-circuit currents. Part of the Mersen Protistor® 36 × 190 mm gR series, this fuse provides dependable protection for railway equipment, industrial DC systems and other demanding high-voltage applications.
Its fast-acting gR characteristic and low let-through energy help minimise thermal and mechanical damage to semiconductor devices during fault conditions. The fuse is engineered for modern DC equipment that operates at elevated temperatures and requires low power losses, reliable interruption performance and a long operational life.
With an 80 A current rating, a rated voltage of 1500 V DC and a maximum DC breaking capacity of 100 kA, the Mersen Q078007 is suitable for protecting converters, rectifiers, inverters and railway power circuits. Its durable ceramic body and silver-plated copper ferrule terminals provide robust electrical and mechanical performance.
Key Advantages
- High-speed gR semiconductor fuse for full-range DC circuit protection.
- 1500 V DC voltage rating for demanding high-voltage installations.
- 80 A rated current for power conversion and auxiliary circuits.
- Low I²t performance helps reduce damage to sensitive semiconductor components.
- Maximum DC breaking capacity of 100 kA.
- Low power losses support efficient and reliable equipment operation.
- Designed for dependable performance at elevated operating temperatures.
- Robust ceramic construction provides excellent thermal and mechanical resistance.
Key Features
- Mersen Protistor® high-speed fuse series.
- Manufacturer item number Q078007.
- Catalogue number FD36GD150V80.
- 80 A rated current.
- 1500 V DC IEC rated voltage.
- gR speed and utilisation characteristic.
- gRD design for DC semiconductor protection.
- 36 × 190 mm cylindrical fuse size.
- Silver-plated copper ferrule terminals.
- Clip-mounting configuration.
- RoHS-compliant construction.
Reliable Protection for High-Voltage DC Equipment
Semiconductor devices can be damaged by overcurrents within a very short period, making rapid fault interruption essential. The Mersen Q078007 is engineered with a low pre-arcing and total I²t to limit the energy reaching protected components during a short circuit.
Its gR full-range characteristic provides both overload and short-circuit protection for semiconductor equipment. This makes the fuse well suited to DC converters, railway traction systems, rectifiers, inverters and auxiliary power circuits where dependable high-speed protection is required.
Typical Applications
- Railway power and auxiliary circuits.
- DC traction and transportation equipment.
- Industrial power converters.
- Semiconductor rectifiers and inverters.
- High-voltage DC distribution systems.
- Battery energy storage equipment.
- Renewable energy conversion systems.
- Industrial drives and power electronic assemblies.
