0219.400MXA

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0219.400MXA fuses are widely used in the application fields of power electronics, consumer electronics and automotive electronics. In these fuses, the chip can quickly detect large inrush currents and then restrict current to the rated value. Moreover, the fuse radiate heat when the defective current is greater than the rated value to protect the electrical system, which improve the safety of the system.

The Working Principle of 0219.400MXA Fuses

The working principle of 0219.400MXA fuses is based on the metallic thin film formed on the surface of the fuses. The metallic thin film is formed by depositing metal (generally nickel) on a glass base. And the process of metal evaporating is called the sputtering, which uses high-frequency electric pulse to produce thermal energy, improving the quality of the film. The vaporized metal collides with atoms on the glass surface and deposits on the glass in the form of a thin film.

When the current passes through the metal film, it will produce resistance to the current flow. The greater the current, the higher the resistance is. At the same time, since the thin film is heated by the flow of current, its resistance further increases. This increase in resistance produces a large inrush current, which limits the current output to the rated value. If the current exceeds the rated value, the metal thin film will heat up further, melting the glass and limiting the current.

Conclusion

0219.400MXA fuses are widely used in power electronics, consumer electronics and automotive electronics. These fuses use the sputtering technology to form a metallic thin film on the surface of the fuse, which can quickly detect and limit large inrush currents.Furthermore, they can withstand high currents and allow current to be restricted if the current exceeds the rated value so as to protect the electrical system and improve the safety of the system.

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