Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE 250V FA 4 A 5.20 Q084010
Mersen Q084010 MI5FA25V4 high speed semiconductor miniature fuse rated 4 A and 250 V AC, with a very fast-acting FA characteristic and compact 5 x 20 mm ceramic cartridge design.
£1.92
Why Choose the Mersen Q084010 MI5FA25V4 High Speed Miniature Fuse?
The Mersen Q084010, catalogue reference MI5FA25V4, is a compact high speed semiconductor miniature fuse designed to protect sensitive electronic components, measuring equipment and industrial control apparatus against overcurrents and short circuits. It forms part of Mersen's proven MI5 FA/FB miniature fuse range.
Rated at 4 A and 250 V AC, the Q084010 features a very fast-acting FA characteristic. Its rapid response helps restrict the electrical and thermal energy transferred to semiconductor devices during a fault, reducing the risk of component damage and costly equipment downtime.
The fuse uses a standard 5 × 20 mm ceramic cartridge format for installation in a compatible clip-mounted fuse holder. Its compact dimensions, super-fast operating performance and high fault-interruption capability make it suitable for industrial electronics, instrumentation, automation equipment and specialised power-electronic assemblies.
Key Advantages
- Very fast-acting semiconductor protection fuse.
- 4 A rated current for electronic and control circuits.
- 250 V AC voltage rating for low-voltage equipment.
- FA operating characteristic provides rapid fault interruption.
- Helps limit damaging electrical energy reaching sensitive components.
- Compact 5 × 20 mm cartridge format saves installation space.
Key Features
- Mersen MI5 FA/FB miniature fuse series.
- Catalogue reference: MI5FA25V4.
- Manufacturer part number: Q084010.
- Rated current: 4 A.
- Rated voltage: 250 V AC.
- Very fast-acting FA fuse characteristic.
- Ceramic cylindrical cartridge construction.
- Compact 5 × 20 mm dimensions.
- Designed for clip mounting in a compatible fuse holder.
- Suitable for semiconductor, measuring and control equipment protection.
Rapid Protection for Sensitive Electronic Equipment
Semiconductor devices can be damaged by fault currents that persist for only a short period. High speed fuses are engineered to respond much faster than standard general-purpose fuses, helping to minimise the thermal and electrical stress placed on sensitive components.
The Mersen Q084010 combines a very fast FA operating characteristic with a compact ceramic cartridge construction. This makes it suitable for protecting semiconductor devices and measuring or control apparatus where rapid fault clearance, dependable performance and limited installation space are important.
Typical Applications
- Semiconductor protection circuits.
- Industrial control equipment.
- Electronic measuring apparatus.
- Instrumentation and monitoring systems.
- Electronic power supplies.
- Automation and signalling equipment.
- Power-electronic assemblies.
- OEM electronic machinery.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 4 A | |
|---|---|---|
| Voltage | 250 V | |
| Device Type | Fuse link | |
| Fuse Type | Miniature, Semiconductor | |
| Fuse Size | 5x20 mm | |
| Fuse Class | Fast acting | |
| Manufacturer | Mersen | |
| Series | MI5 FA/FB 125–250 V Miniature Fuses | |
| Model | MI5FA25V4 | |
| Part number | Q084010 | |
| Product type | High speed semiconductor miniature fuse | |
| Rated current | 4 A | |
| Rated voltage | 250 V AC | |
| Operating characteristic | Very fast-acting, FA / FF | |
| Fuse size | 5 × 20 mm | |
| Overall length | 20 mm | |
| Body diameter | 5 mm | |
| Body material | Ceramic | |
| Mounting type | Clip mounting / compatible fuse holder | |
| Application | Semiconductor and electronic circuit protection | |
| Standards and approvals | IEC and UL | |
| Country of origin | Tunisia |
Frequently Asked Questions
What is the Mersen Q084010 used for?
The Q084010 provides rapid overcurrent and short-circuit protection for semiconductor devices, measuring equipment, industrial controls and other sensitive electronic circuits.
What current rating does the Q084010 have?
The Mersen Q084010 has a rated current of 4 A.
What voltage is this fuse rated for?
This high speed miniature fuse is rated for operation at up to 250 V AC.
Is the Mersen Q084010 a fast-acting fuse?
Yes. It has a very fast-acting FA characteristic designed to interrupt fault currents rapidly and protect sensitive electronic components.
How is the Q084010 installed?
The fuse has a standard 5 × 20 mm cylindrical cartridge format and is installed in a compatible clip-mounted miniature fuse holder.
Trusted by Electronics and Automation Engineers
Mersen high speed miniature fuses are used by electronic equipment manufacturers, automation specialists and maintenance engineers to protect sensitive semiconductor and control circuits from damaging electrical faults.
