Why Choose the Mersen H079771 High-Speed Miniature Fuse?
The Mersen H079771, catalogue reference MI6FA40V5P, is a very fast-acting miniature semiconductor fuse developed to protect sensitive electronic and semiconductor devices from overcurrent and short-circuit faults. Part of Mersen's proven 6.3 × 32 mm FA 400 V series, it combines high-speed performance with a built-in striker indicator for dependable protection in demanding industrial applications.
With a rated current of 5 A and a 400 V AC voltage rating, the H079771 interrupts fault currents rapidly, helping minimise damage to valuable semiconductors, converters and electronic control equipment. Its ceramic construction and high breaking capacity provide reliable protection in industrial environments.
Designed in a standard 6.3 × 32 mm cylindrical format, the fuse is intended for clip mounting in compatible fuse holders. The integrated striker indicator provides mechanical indication of fuse operation, simplifying maintenance and reducing troubleshooting time.
Key Advantages
- Very fast-acting protection for sensitive semiconductor devices.
- 5 A rated current for industrial electronic protection.
- 400 V AC rated voltage for demanding applications.
- Integrated striker indicator for rapid fault identification.
- High breaking capacity for safe interruption of fault currents.
- Compact 6.3 × 32 mm ceramic construction.
Key Features
- Mersen FA semiconductor miniature fuse series.
- Very fast-acting (FA) operating characteristic.
- 5 A rated current.
- 400 V AC rated voltage.
- 6.3 × 32 mm ceramic body.
- Clip mounting design.
- Integrated striker indicator.
- UL recognised and RoHS compliant.
Reliable High-Speed Semiconductor Protection
Very fast-acting semiconductor fuses are designed to disconnect fault currents before excessive thermal energy can damage expensive power electronic components. Their rapid response makes them ideal for protecting IGBTs, thyristors, rectifiers, inverters and industrial converters.
The Mersen H079771 combines compact dimensions with dependable high-speed protection and an integrated striker indicator, making it an excellent choice for industrial automation, electronic control systems and OEM equipment where equipment uptime is critical.
Typical Applications
- Semiconductor protection.
- Industrial drives and converters.
- Power supplies and UPS systems.
- Industrial automation equipment.
- Electronic control panels.
- OEM machinery and power electronics.
