Why Choose the Mersen R093303 High-Speed Semiconductor Fuse?
The Mersen R093303, catalogue reference MI5FA40V0.063, is a compact very fast-acting miniature fuse designed to protect sensitive semiconductor devices and low-current electronic circuits against damaging overcurrents. It forms part of Mersen's 5 × 20 mm FA high rupturing capacity fuse range for applications operating at up to 400 V.
Its FA very fast-acting characteristic enables rapid fault interruption, helping limit the thermal and electrical stress placed on vulnerable electronic components. This makes the R093303 suitable for protecting semiconductor devices, instrumentation, control electronics and other circuits that require precise low-current protection.
With a rated current of 0.063 A, equivalent to 63 mA, and a rated voltage of 400 V AC, the R093303 is designed for sensitive circuits where a higher-rated fuse may not provide adequate protection. Its ceramic 5 × 20 mm cartridge body allows straightforward installation in a compatible clip-mounted fuse holder.
Key Advantages
- Very fast-acting FA fuse characteristic for sensitive electronics.
- 0.063 A rated current for precise low-current protection.
- 400 V AC voltage rating for industrial electronic circuits.
- Compact 5 × 20 mm cartridge format.
- Ceramic tube construction provides dependable thermal performance.
- Replaceable format supports straightforward servicing and maintenance.
Key Features
- Mersen MI5FA40V0.063 miniature fuse.
- 63 mA rated current.
- 400 V AC rated voltage.
- FA very fast-acting operating characteristic.
- 5 × 20 mm cylindrical ceramic body.
- Nickel-plated brass end caps.
- Filled fuse construction.
- Designed for clip mounting in a compatible fuse holder.
Precise Protection for Sensitive Low-Current Circuits
Semiconductor components and electronic control circuits can be damaged by relatively small fault currents because they have limited thermal capacity. The Mersen R093303 is designed to respond very quickly to excessive current, helping reduce the amount of damaging energy that reaches protected components.
Its low 63 mA rating makes it particularly suitable for instrumentation, sensing equipment and control electronics requiring finely rated protection. The compact ceramic cartridge format also enables easy integration into industrial equipment where installation space is restricted.
Typical Applications
- Semiconductor and electronic component protection.
- Industrial control and automation electronics.
- Instrumentation and measurement equipment.
- Low-current power supply circuits.
- Electronic control modules.
- Sensitive monitoring and signalling circuits.
