Why Choose the Mersen R078330 High-Speed Semiconductor Fuse?
The Mersen R078330 is a Protistor® URQ high-speed cylindrical semiconductor fuse engineered to provide ultra-fast protection for power semiconductor devices used in industrial power conversion equipment. Designed in accordance with IEC 60269-1 and IEC 60269-4, it offers exceptional current-limiting performance and a high breaking capacity to help protect sensitive electronic components from damaging fault currents.
Part of the Protistor® 27 × 60 mm URQ series, the R078330 is rated at 100 A and 690 V AC. It is intended for semiconductor protection in industrial inverters, motor drives, UPS systems and similar power electronic equipment where rapid fault clearance is essential.
Its advanced current-limiting construction helps minimise thermal and mechanical stress on semiconductor devices, improving equipment reliability while reducing maintenance costs and downtime.
Key Advantages
- High-speed URQ semiconductor fuse for industrial power electronics.
- 100 A rated current for demanding applications.
- 690 V AC rated voltage.
- Ultra-fast current-limiting protection.
- Designed to protect expensive semiconductor devices.
- Compact 27 × 60 mm cylindrical construction.
Key Features
- Manufacturer: Mersen.
- Series: Protistor® URQ.
- Manufacturer reference: R078330.
- Description: 6.921 CP URQ 27×60/100.
- Rated current: 100 A.
- Rated voltage: 690 V AC.
- High-speed semiconductor protection.
- Designed for industrial power conversion equipment.
Engineered for Industrial Power Electronics
Power semiconductor devices require extremely fast protection against short-circuit faults. Protistor® semiconductor fuses are designed to interrupt fault currents rapidly while limiting the electrical energy that reaches IGBTs, thyristors, diodes and rectifiers, helping to maximise equipment life and minimise costly downtime.
The Mersen R078330 is suitable for industrial applications including variable speed drives, power converters, UPS installations and renewable energy equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable speed drives.
- Industrial inverters.
- UPS systems.
- Power converters.
- Motor control equipment.
- Renewable energy power conversion systems.
- Industrial automation equipment.
- Semiconductor protection circuits.
