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MERSEN FUSE 250V 5SF 0,1A 5.20 MI5SF25V0.1
Mersen A090505 5 × 20 mm fast-acting glass cartridge fuse rated at 0.1 A and 250 V AC, designed to protect sensitive electrical and electronic circuits.
Why Choose the Mersen A090505 Fast-Acting Glass Cartridge Fuse?
The Mersen A090505, catalogue reference MI5SF25V0.1, is a compact and dependable fast-acting miniature cartridge fuse designed to protect electrical and electronic circuits against overcurrent and short-circuit faults. As part of the Mersen 5SF IEC miniature fuse series, it provides rapid operation when excessive current is detected, helping prevent damage to sensitive components and connected equipment.
Rated at 0.1 A and 250 V AC, the A090505 is particularly suitable for low-current control, instrumentation and electronic circuits. Its fast-acting characteristic responds quickly to abnormal current conditions, making it appropriate for applications that do not experience significant start-up or inrush currents.
The fuse features a standard 5 × 20 mm glass body, allowing straightforward installation in compatible fuse clips, holders and equipment-mounted fuse carriers. Its compact construction, low melting energy and recognised IEC format make it a practical protection solution for industrial equipment, electrical distribution circuits and OEM electronic assemblies.
Key Advantages
- Compact 5 × 20 mm miniature cartridge fuse.
- 0.1 A current rating for sensitive low-current circuits.
- 250 V AC rated voltage.
- Fast-acting characteristic provides rapid overcurrent protection.
- 35 A AC breaking capacity.
- Low melting I²t helps protect delicate electrical components.
- Transparent glass body allows visual inspection of the fuse element.
- Suitable for standard clips and 5 × 20 mm fuse holders.
Key Features
- Mersen 5SF IEC miniature fuse series.
- 0.1 A rated current.
- 250 V AC rated voltage.
- Fast-acting fuse characteristic.
- 35 A maximum AC breaking capacity.
- 0.004 A²s melting I²t.
- 0.46 W power dissipation at rated current.
- Standard 5 × 20 mm cylindrical format.
- Glass body for easy fuse-element inspection.
- Clip mounting for straightforward replacement.
Rapid Protection for Sensitive Electrical Circuits
Fast-acting fuses such as the Mersen A090505 interrupt excessive current quickly, reducing the amount of fault energy that reaches sensitive components. This makes the fuse suitable for circuits where even a relatively short overcurrent could damage circuit boards, measuring equipment, control electronics or other low-current devices.
The A090505 should be selected according to the circuit voltage, normal operating current, prospective fault current and equipment manufacturer’s requirements. Because it is fast acting, it is best suited to circuits with limited inrush current rather than loads such as larger motors or transformers that may require time-delay protection.
Typical Applications
- Industrial control and monitoring circuits.
- Electronic equipment and circuit boards.
- Instrumentation and measuring devices.
- Low-current power supplies.
- Automation and process-control equipment.
- OEM electrical and electronic assemblies.
Technical Specifications
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| Current | 0.1 A | |
|---|---|---|
| Voltage | 250 V | |
| Device Type | Fuse link | |
| Fuse Type | Miniature | |
| Fuse Size | 5x20 mm | |
| Fuse Class | Fast acting | |
| Manufacturer | Mersen | |
| Series | IEC Miniature Fuses 5SF | |
| Model | A090505 | |
| Catalogue number | MI5SF25V0.1 | |
| Product type | Fast-acting miniature cartridge fuse | |
| Rated current | 0.1 A | |
| Rated voltage | 250 V AC | |
| Current type | AC | |
| Fuse characteristic | Fast-acting | |
| Maximum AC breaking capacity | 35 A | |
| Melting I²t | 0.004 A²s | |
| Power dissipation at rated current | 0.46 W | |
| Fuse size | 5 × 20 mm | |
| Product diameter | 5.1 mm | |
| Product length | 20 mm | |
| Mounting type | Clip mounting | |
| Body material | Glass | |
| Product weight | Approx. 0.0012 kg | |
| Compliance | RoHS compliant |
Frequently Asked Questions
What is the Mersen A090505 used for?
The Mersen A090505 is a fast-acting miniature fuse used to protect low-current electrical and electronic circuits against overloads and short circuits.
What are the voltage and current ratings of this fuse?
The A090505 is rated at 0.1 A and 250 V AC.
What does fast acting mean?
A fast-acting fuse responds quickly when current exceeds its permitted level, helping minimise the fault energy passed to sensitive electronic components.
What size is the Mersen A090505?
The fuse has a standard cylindrical size of 5 × 20 mm, with an approximate diameter of 5.1 mm and length of 20 mm.
Can this fuse be used for circuits with high inrush current?
It is generally intended for circuits with limited inrush current. Applications with substantial starting current may require a suitably rated time-delay fuse instead.
Trusted Circuit Protection from Mersen
Mersen miniature fuses are widely used by equipment manufacturers, control-panel builders and maintenance engineers for reliable overcurrent protection and consistent performance in industrial and electronic applications.
