Why Choose the Mersen H093318 High-Speed Miniature Fuse?
The Mersen H093318, catalogue reference MI5FA40V0.5, is a very fast-acting miniature semiconductor fuse designed to protect sensitive electronic and semiconductor devices against overcurrent and short-circuit faults. Part of Mersen's 5 × 20 mm FA 400 V series, it delivers dependable high-speed protection for industrial electronics, instrumentation and power control equipment.
With a rated current of 0.5 A and a 400 V AC voltage rating, the H093318 interrupts fault currents rapidly, helping minimise the thermal and electrical stress placed on semiconductor devices. Its ceramic construction and high breaking capacity make it suitable for demanding industrial environments.
Manufactured in the industry-standard 5 × 20 mm cylindrical format, the fuse is designed for clip mounting in compatible fuse holders. Its compact design allows easy integration into electrical panels, industrial machinery and OEM equipment where reliable semiconductor protection is essential.
Key Advantages
- Very fast-acting protection for sensitive semiconductor devices.
- 0.5 A rated current for precision circuit protection.
- 400 V AC rated voltage for industrial electronic applications.
- Very high 200 kA breaking capacity.
- Compact 5 × 20 mm ceramic construction.
- Clip mounting enables straightforward installation and replacement.
Key Features
- Mersen FA semiconductor miniature fuse series.
- Very fast-acting (FA) characteristic.
- 0.5 A rated current.
- 400 V AC rated voltage.
- 5 × 20 mm ceramic body.
- Clip mounting configuration.
- Designed for semiconductor and power electronics protection.
- RoHS, REACH and UKCA compliant.
Reliable High-Speed Protection for Semiconductor Circuits
Very fast-acting semiconductor fuses are engineered to disconnect fault currents before excessive thermal energy can damage expensive power electronic components. Their rapid operating characteristic helps maximise equipment reliability while reducing the risk of costly component failures.
The Mersen H093318 combines compact dimensions with high interrupting performance, making it ideal for industrial automation, instrumentation, electronic power supplies, converters and OEM machinery where dependable semiconductor protection is essential.
Typical Applications
- Semiconductor protection.
- Industrial electronic controls.
- Power supplies and converters.
- Instrumentation and measurement equipment.
- Automation and control systems.
- OEM electronic assemblies.
