Why Choose the Mersen D084321 High-Speed Miniature Fuse?
The Mersen D084321, catalogue reference MI6FA25V0.315, is a compact high-speed semiconductor miniature fuse designed to protect sensitive electronic components and semiconductor devices against damaging overcurrents and short circuits. Part of Mersen’s 6.3 × 32 mm FA fuse range, it delivers very fast fault interruption for industrial electronics, measuring equipment and control apparatus.
Rated at 0.315 A and 250 V AC, the D084321 features a high-speed FA operating characteristic that helps minimise the energy passed into protected components during a fault. This makes it particularly suitable for circuits containing sensitive diodes, thyristors, rectifiers and other semiconductor devices that require faster protection than a conventional general-purpose fuse can provide.
The fuse has a durable ceramic body with ferrule terminals and a compact 6.3 × 32 mm cylindrical format. Designed for clip mounting in a compatible fuse holder, it supports straightforward installation and replacement while providing a very high 200 kA minimum interrupting rating for dependable fault protection.
Key Advantages
- High-speed semiconductor protection fuse for sensitive circuits.
- 0.315 A rated current for low-current electronic equipment.
- 250 V AC voltage rating.
- Very fast FA characteristic helps limit damaging let-through energy.
- Very high 200 kA minimum interrupting rating.
- Compact 6.3 × 32 mm cylindrical cartridge.
- Clip mounting enables convenient installation and replacement.
Key Features
- Mersen semiconductor miniature fuse range.
- MI6FA25V0.315 catalogue reference.
- 0.315 A rated current.
- 250 V AC rated voltage.
- High-speed FA operating characteristic.
- 6.3 × 32 mm ceramic fuse body.
- Ferrule terminal configuration.
- Clip-mounted cartridge design.
- Very high fault interrupting capability.
- RoHS-compliant construction.
Fast Protection for Sensitive Electronic Components
Semiconductor components can be damaged by overcurrent events that develop too rapidly for conventional general-purpose fuses to interrupt effectively. The Mersen D084321 uses a high-speed FA characteristic to disconnect fault currents quickly, helping reduce thermal stress and electrical damage to protected devices.
Its low melting and clearing I²t values help restrict the amount of energy released during fault interruption. The compact clip-mounted design also allows the fuse to be installed in space-restricted electronic assemblies and replaced easily during inspection or maintenance.
Typical Applications
- Semiconductor device protection.
- Measuring and control apparatus.
- Industrial electronic equipment.
- Diode and thyristor protection.
- Rectifiers and power conversion circuits.
- Automation and machine control systems.
- Low-current power electronic assemblies.
