The function of patch fuse.motorhome fuse box

　　In electronic products, patch fuses have two main functions, which are to provide overload protection, avoid circuit damage, and protect users from personal injury. These functions are beneficial for both device users and manufacturers. In the past two decades, the electronic product market for information technology, mobile, and consumer applications has grown rapidly. With the miniaturization and SMD of electronic components, fuses have also moved towards miniaturization. The application of SMD fuses is becoming increasingly evident and widespread. They are used in computer and peripheral interfaces, mobile phones, portable devices, energy storage systems, medical devices, networking devices, LCP/PDP devices Overcurrent protection in automotive electronics and battery packs has shown great skill.

　　Key performance parameters

　　The fusing characteristic is the most important characteristic of patch fuses, which defines the melting time at a certain overcurrent level. If the current reaches a predetermined level, during a cycle called pre arc time, the electrical power emitted by the fuse is sufficient to melt and evaporate the fuse.

　　The blowing time of a fuse is related to the thermal resistance between the fuse and the environment, which depends on the parameters of the fuse, substrate, seal, and terminal, as well as the layout of the printed circuit board. Therefore, the disconnection time and the effectiveness of protection depend on both manufacturing technology and product design. If the thermal resistance between the fuse and the environment is too low, there may not be enough energy to melt the fuse. In this way, when the overload current is equal to twice the rated current, the fuse cannot cut off the overload current within 120s.

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