Why Choose the Mersen A084019 High-Speed Miniature Fuse?
The Mersen A084019, catalogue number MI5FA25V0.4, is a compact high-speed semiconductor miniature fuse designed to protect sensitive electronic components, semiconductor devices and measuring or control equipment against damaging overcurrent and short-circuit conditions.
Part of Mersen’s MI5FA miniature fuse range, the A084019 combines a standard 5 × 20 mm cylindrical format with a rated current of 0.4 A and a rated voltage of 250 V AC. Its very fast-acting FA characteristic enables the fuse to interrupt fault currents rapidly, helping limit thermal and electrical stress on vulnerable circuit components.
The Mersen A084019 features a ceramic body, ferrule terminals and a high 10 kA minimum interrupting rating. Its compact clip-mounted construction makes it suitable for industrial control apparatus, instrumentation, electronic power supplies and other equipment requiring dependable semiconductor protection.
Key Advantages
- High-speed FA characteristic provides rapid fault interruption.
- 0.4 A current rating for sensitive electronic circuits.
- 250 V AC voltage rating for control and instrumentation equipment.
- High 10 kA minimum interrupting rating.
- Compact 5 × 20 mm cylindrical format.
- Durable ceramic body with ferrule terminal connections.
Key Features
- Mersen MI5FA semiconductor miniature fuse series.
- 0.4 A rated current.
- 250 V AC rated voltage.
- High-speed, very fast-acting FA fuse characteristic.
- 10 kA minimum breaking capacity.
- Clip-mounted cylindrical fuse construction.
- Ferrule terminal connection.
- High-quality ceramic insulating body.
- RoHS-compliant construction.
- Suitable for semiconductor and control apparatus protection.
Rapid Protection for Sensitive Electronic Equipment
Semiconductor devices can be damaged by relatively short overcurrent events. High-speed fuses such as the Mersen A084019 respond rapidly when excessive current occurs, helping limit the energy passed into sensitive components before significant thermal or electrical damage develops.
The A084019 combines a low melting I²t value with a high interrupting capacity, making it suitable for circuits that require fast and dependable fault clearance. Its standard 5 × 20 mm format allows straightforward installation in a correctly rated compatible clip-mounted fuse holder.
Typical Applications
- Semiconductor device protection.
- Electronic measuring equipment.
- Industrial control apparatus.
- Automation and process control systems.
- Electronic power supplies.
- Instrumentation and monitoring equipment.
