In the manufacturing process of automotive fuse holders, there are mainly several products with limited melting time. When choosing a power module, we must consider the theoretical requirements of mandatory temperature limits. Because of differences in temperature and materials, the cost will be very large Differences, improper application will have an impact, must be considered carefully. The output ripple and noise power of the automobile fuse holder are low, and the electrostatic care is good, but the department has higher requirements for magnetic materials, and the cost will increase. Therefore, fuse products The frequency of the fuses is lower than 300kHz, and some even only need about 100kHz. Therefore, it is difficult to meet the needs of harsh applications under the premise of static load variables, and high-frequency switching products should be considered. The fuse protection of automotive fuse holders should be at least Including input over-voltage, under-voltage and soft-start protection during use, output over-voltage, over-current and short-circuit protection during use, its products should also have over-temperature protection during use, and should give way. The fuse is not effective as expected The main reason for the time is the risk of external defects. In short, regardless of the thermal fuse series, the power is used, the package is smaller, but the cost is higher. The purpose of making automotive fuse holders is to prolong the life of the fuse and improve the reliability of the system The secondary link is to choose a product with perfect protection function, that is, the power supply of the external circuit defect module of the fuse can automatically enter the protection state without failure, and it should automatically return to normal after the external defect is eliminated. When the car fuse holder is in use, its fusing current mainly refers to The rated current of the fuse, that is, the fuse can work continuously for more than 4 hours without blowing. Fuse of nominal current can be installed.