Why Choose the Mersen F075721 Protistor® High-Speed Fuse?
The Mersen F075721 is a high-performance Protistor® cylindrical semiconductor protection fuse designed to provide ultra-fast protection for sensitive power electronic equipment operating on DC systems. Rated at 8 A with a 440 V DC voltage rating, this fuse rapidly interrupts fault currents to help protect valuable semiconductor devices from damage while improving system reliability.
As part of the trusted Mersen Protistor® 14 × 51 mm gLB series, the F075721 features a built-in striker indicator, high breaking capacity and low let-through energy. It has been specifically developed for protecting IGBTs, thyristors, diodes and other semiconductor devices used in industrial power conversion equipment.
Manufactured to IEC standards and fully RoHS compliant, this cylindrical semiconductor fuse is widely specified for renewable energy installations, UPS systems, railway auxiliary circuits, battery energy storage systems and industrial DC drives where dependable semiconductor protection is essential.
Key Advantages
- Ultra-fast gLB semiconductor protection fuse.
- 440 V DC rating for demanding DC applications.
- 8 A current rating for semiconductor circuit protection.
- Low I²t characteristics reduce stress on protected components.
- Integrated striker for remote fuse indication.
- Designed specifically for modern power electronic equipment.
Key Features
- Manufacturer: Mersen.
- Series: Protistor® Size 14 × 51 gLB.
- Part number: F075721.
- Catalogue number: FD14GB44V8T.
- Rated current: 8 A.
- Rated voltage: 440 V DC.
- Fuse characteristic: gLB.
- 14 × 51 mm cylindrical body.
- Integrated striker indication.
- RoHS compliant.
Fast Protection for Critical Semiconductor Devices
Semiconductor fuses are engineered to interrupt fault currents within milliseconds, significantly reducing electrical and thermal stress on expensive semiconductor components. Their ultra-fast operation helps maximise equipment uptime while preventing catastrophic failures in power electronic systems.
The Mersen Protistor® range is widely trusted by equipment manufacturers for protecting converters, inverters, UPS systems, renewable energy equipment, railway systems and battery storage installations where dependable DC circuit protection is essential.
Typical Applications
- Industrial DC power converters.
- Solar photovoltaic inverters.
- Battery energy storage systems.
- UPS systems.
- Railway auxiliary circuits.
- Reduced voltage motor starters.
- Protection of IGBT, SCR and diode modules.
