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.
