Why Choose the Mersen X205042 Fast-Acting Miniature Fuse?
The Mersen X205042, catalogue number MI5FCP25V4, is a compact and reliable fast-acting semiconductor miniature fuse designed to protect sensitive electronic components against damaging overcurrents and short circuits. It forms part of Mersen’s 5 × 20 mm FC fuse range and is equipped with axial leads for direct integration into printed circuit boards and electronic assemblies.
Its fast-acting FC characteristic enables the fuse to interrupt excessive current quickly, helping reduce the electrical and thermal stress placed on semiconductor devices and associated circuitry. This makes the X205042 suitable for power supplies, control boards, converters, measuring equipment and other applications where rapid and dependable circuit protection is required.
Rated at 4 A and 250 V AC, the Mersen X205042 combines a ceramic fuse body with a 1.5 kA minimum interrupting rating. Its axial leads support soldered PCB mounting, providing a secure electrical connection and helping simplify integration into compact electronic equipment.
Key Advantages
- Fast-acting FC fuse characteristic for sensitive electronic circuit protection.
- 4 A rated current for control boards and electronic equipment.
- 250 V AC rated voltage for compatible low-voltage applications.
- 1.5 kA minimum interrupting rating for dependable fault clearance.
- Axial leads allow direct soldering onto printed circuit boards.
- Compact ceramic construction supports space-efficient equipment designs.
Key Features
- Mersen X205042 fast-acting miniature fuse.
- Catalogue number MI5FCP25V4.
- 4 A rated current.
- 250 V AC IEC rated voltage.
- Fast-acting FC operating characteristic.
- 1.5 kA minimum interrupting rating.
- 6.1 A²s melting I²t.
- 12 A²s clearing I²t at rated voltage.
- Axial lead mounting for PCB installation.
- Ceramic body with soldered electrical connections.
Fast Protection for PCB-Mounted Electronics
Electronic components can be damaged quickly when excessive current flows through a circuit. Fast-acting fuses such as the Mersen X205042 are designed to interrupt fault currents rapidly, helping limit the energy transferred to semiconductor devices, printed circuit boards and connected equipment.
The axial leads allow the fuse to be soldered directly into a PCB or connected to other electronic components. Its ceramic body and compact dimensions make it suitable for industrial electronics, power conversion equipment and control systems where reliable protection must be integrated into a restricted installation space.
Typical Applications
- Printed circuit boards and electronic assemblies.
- Semiconductor devices and control circuits.
- Electronic power supplies and converters.
- Industrial automation and control equipment.
- Measurement and instrumentation systems.
- Electronic equipment requiring fast fault interruption.
