Why Choose the Mersen W093307 High-Speed Miniature Fuse?
The Mersen W093307, catalogue number MI5FA40V0.125, is a high-speed semiconductor miniature fuse designed to provide rapid overcurrent protection for sensitive semiconductor devices, power electronic equipment and industrial control systems. As part of Mersen's 5 × 20 mm FA 400 V miniature fuse range, it delivers exceptionally fast fault interruption to minimise fault energy and help protect valuable electronic components.
With a rated current of 0.125 A and a rated operating voltage of 400 V AC, the W093307 is ideal for instrumentation, converters, power supplies, automation systems and other semiconductor-based equipment operating on higher-voltage circuits. Its fast FA characteristic provides dependable protection against damaging overloads and short circuits.
The fuse features a robust 5 × 20 mm ceramic cartridge with ferrule terminals for clip mounting in compatible fuse holders. A 10 kA breaking capacity together with exceptionally low I²t values helps minimise thermal stress on protected components, improving equipment reliability and reducing downtime.
Key Advantages
- Designed for semiconductor and sensitive electronic circuit protection.
- 0.125 A rated current for precision electronic applications.
- 400 V AC rated voltage.
- Ultra-fast FA operating characteristic.
- Compact 5 × 20 mm ceramic cartridge.
- 10 kA breaking capacity for dependable fault interruption.
- Clip mounting enables quick installation and replacement.
- Very low I²t values help minimise damage to semiconductor devices.
- RoHS compliant construction.
Key Features
- Mersen 5 × 20 mm FA 400 V semiconductor fuse series.
- Catalogue number: MI5FA40V0.125.
- 0.125 A rated current.
- 400 V AC rated voltage.
- High-speed FA operating characteristic.
- Ceramic fuse body with ferrule terminals.
- Clip mounting installation.
- Pre-arcing I²t: 0.00077 A²s.
- Clearing I²t: 0.0045 A²s.
- Designed for semiconductor protection applications.
Reliable Protection for Semiconductor Equipment
The Mersen W093307 is specifically engineered for protecting semiconductor devices where extremely rapid fault clearance is essential. Its exceptionally low I²t performance limits the energy delivered during fault conditions, reducing the risk of damage to sensitive electronic components.
The ceramic construction, compact dimensions and high-voltage capability make this fuse well suited to industrial automation systems, instrumentation, power conversion equipment and other applications requiring dependable high-speed circuit protection.
Typical Applications
- Semiconductor protection.
- Industrial power electronics.
- Power converters and inverters.
- Variable speed drives.
- Automation and control systems.
- Instrumentation equipment.
- Electronic control panels.
- OEM machinery.
