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MERSEN FUSE 250V FA 20 A 6.32 A084318
Mersen A084318 MI6FA high-speed semiconductor miniature fuse rated at 20 A and 250 V AC in a compact 6.3 x 32 mm ceramic format.
£2.99
Why Choose the Mersen A084318 High-Speed Miniature Fuse?
The Mersen A084318, catalogue number MI6FA25V20, is a compact high-speed semiconductor miniature fuse designed to protect sensitive electronic components, power semiconductors and control equipment against damaging overcurrent and short-circuit conditions.
Part of the Mersen MI6FA range, the A084318 combines a standard 6.3 × 32 mm cylindrical format with a rated current of 20 A and a rated voltage of 250 V AC. Its very fast-acting FA characteristic enables rapid fault interruption, helping minimise the thermal and electrical energy passed into vulnerable semiconductor devices.
The Mersen A084318 features a high-breaking-capacity ceramic construction with ferrule terminals for clip mounting. It is suitable for protecting converters, diodes, thyristors, triacs, measuring equipment and industrial control apparatus where reliable and rapid circuit protection is required.
Key Advantages
- High-speed FA characteristic provides rapid fault interruption.
- 20 A current rating for electronic and semiconductor circuits.
- 250 V AC voltage rating for industrial applications.
- High-breaking-capacity construction limits damaging fault energy.
- Compact 6.3 × 32 mm cylindrical format.
- UL-recognised range for dependable equipment protection.
Key Features
- Mersen MI6FA semiconductor miniature fuse series.
- 20 A rated current.
- 250 V AC rated voltage.
- Very fast-acting, high-speed FA fuse characteristic.
- 200 A²s clearing I²t at rated voltage.
- Clip-mounted cylindrical fuse construction.
- Ferrule terminal connections.
- Durable ceramic insulating body.
- No integrated fuse operation indicator.
- RoHS and REACH compliant.
Rapid Protection for Semiconductor Equipment
Power semiconductors can be damaged by fault currents that persist for only a short period. High-speed fuses such as the Mersen A084318 respond rapidly to excessive current, helping restrict the let-through energy before significant thermal or electrical damage develops.
The A084318 is particularly suitable for converter and semiconductor applications involving diodes, thyristors and triacs. Its standard 6.3 × 32 mm format enables straightforward installation in a correctly rated compatible fuse clip or fuse holder.
Typical Applications
- Semiconductor power converters.
- Diode and thyristor protection.
- Triac-based control equipment.
- Industrial control apparatus.
- Electronic measuring equipment.
- Automation and process control systems.
Technical Specifications
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| Current | 20 A | |
|---|---|---|
| Voltage | 250 V | |
| Device Type | Fuse link | |
| Fuse Type | Miniature, Semiconductor | |
| Fuse Size | 6.3x32 mm | |
| Fuse Class | Fast acting | |
| Manufacturer | Mersen | |
| Item number | A084318 | |
| Catalogue number | MI6FA25V20 | |
| Product type | Semiconductor miniature fuse | |
| Fuse series | MI6FA | |
| Rated current | 20 A | |
| Rated voltage | 250 V AC | |
| Current type | AC | |
| Speed / characteristic | High speed | |
| Design characteristic | FA / very fast acting | |
| Clearing I²t at rated voltage | 200 A²s | |
| Fuse size | 6.3 × 32 mm | |
| Product diameter | 6.3 mm | |
| Product length | Approx. 32 mm | |
| Mounting type | Clip mounting | |
| Connection type | Ferrule | |
| Body material | Ceramic | |
| Indication system | No | |
| Product weight | Approx. 2.5 g | |
| EAN / UPC | 3605340062014 | |
| Standard pack quantity | 50 | |
| Approvals | UL / CSA recognised | |
| Compliance | RoHS and REACH compliant |
Frequently Asked Questions
What is the Mersen A084318 used for?
The Mersen A084318 provides high-speed protection for semiconductor devices, converters, electronic components and industrial control equipment against overcurrent and short-circuit faults.
What is the current rating of the A084318 fuse?
The Mersen A084318 has a rated current of 20 A.
What voltage is the Mersen A084318 rated for?
The fuse has a rated voltage of 250 V AC.
What size is the A084318 fuse?
The A084318 has a standard cylindrical fuse size of 6.3 × 32 mm and is designed for clip mounting in a compatible fuse holder.
Is the Mersen A084318 a time-delay fuse?
No. The A084318 has a very fast-acting FA characteristic and is designed to interrupt fault currents rapidly to protect sensitive semiconductor devices.
Trusted Semiconductor Protection from Mersen
Mersen high-speed miniature fuses are used by equipment manufacturers, control engineers and maintenance professionals to provide dependable protection for semiconductor converters, electronic equipment and industrial control systems.
