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September 16,2023

The Development History of Fuses.fast blow or slow blow fuse for multimeter

　　　　In the 1880s, since Edison invented the light bulb and failed countless experiments on tungsten wire, it also opened up the development history of fuses. The success of light bulbs has also driven the development of fuses. With the development of society and the increasing strength of electrical appliances, the fuse industry has also experienced rapid development.　　In daily life, the widespread application of the electronic age has led to the emergence of various types of electrical designs, with changes in both appearance and circuit structure. Therefore, the requirements for fuses are also greatly different, with modifications and upgrades made in terms of appearance/size/installation form/material/structure/specification/characteristics/application, all in order to better apply them in circuits, The development of these small fuses has gone through four revolutionary innovation milestones.　　Due to slight differences in the development of industries and environmental conditions a

October 26,2023

tv fuse blows when plugged in.The impact of fuse aging on usage

　　　　After the fuse ages, there is no danger of generating the current that should be cut off and the fuse not blowing. The aging of a fuse is equivalent to a decrease in the rated value (current) rather than an increase, resulting in the circuit being cut off at a small overload current or pulse.　　The durability test in the IEC standard is the life test, which is conducted using a DC power supply at normal temperature:　　a. Measure the voltage drop until the temperature stabilizes;　　b. 1.2 times the rated current for 1 hour and cut off the current for 15 minutes. Cycle 100 times;　　c. Measure the voltage drop after powering on for 1.5 In for 1 hour;　　d. Measure the voltage drop using the same method as A.　　Requirement: The voltage drop change before and after the test should not exceed 10%, and the identification should still be clear and distinguishable. There should be no deterioration in the end cap solder joints.

September 12,2024

Is the fuse lead or tin

　　　　The material of fuses is usually not simply lead or tin, but alloys of various components such as lead tin alloys.　　In the early days, pure lead was used as the material for fuses. Lead has a low melting point and can quickly melt when the current is too high, thereby protecting the circuit. However, pure lead also has some limitations, such as relatively low mechanical strength and susceptibility to deformation in some complex installation environments.　　Tin also has a lower melting point, but pure tin is not ideal in some aspects, such as the possibility of "tin plague" phenomenon at low temperatures, which can cause changes in material properties.　　Lead tin alloy combines the advantages of both. This alloy can adjust the ratio of lead and tin according to different needs to achieve the appropriate melting point. Usually, fuses of different specifications can control the melting temperature by changing the alloy composition. This ensures timely melting under overcurrent condition

November 09,2023

temperature balancing mattress protector.The difference between fast break patch fuse and slow break patch fuse

　　　　The main difference between slow fuse and fast fuse is its ability to withstand instantaneous pulse current, which means that it can resist the impact of surge current when switching on and off, thereby ensuring the normal operation of the equipment. Therefore, slow fuse is often referred to as surge resistant fuse. From a technical perspective, slow melting fuses have a large melting heat value of I2t, and the energy required for fuse melting is relatively high. Therefore, for fuses with the same rated current, slow melting has a much stronger ability to withstand pulses than fast melting.　　Due to the fact that the I2t of a slow fuse is larger than that of a fast fuse of the same specification, the fusing time in the event of overcurrent in the circuit will also be slower than that of a fast fuse. Is it possible that the protection performance may be worse than some people are concerned about? We said no! Because once a circuit malfunctions, the overcurrent will not disappear on i

September 13,2023

Self recovery fuse on mobile power PCB board

　　　　The mobile power supply consists of overcurrent protection devices, batteries, and control charging and discharging circuits. The previous charging and discharging circuits used ICs for overcurrent protection, which were complex, had high failure rates, and high costs. Some users returned or repaired the circuit, and the manufacturer was fined and claimed compensation, which caused great trouble for manufacturers and designers. The above problems must be solved in order to promote their application. The manufacturer has designed many solutions for overcurrent protection, using self recovery fuses, with fewer components, low failure rates, good functionality, and fast overcurrent response The simplest and lowest cost solution for overcurrent protection of mobile power supplies solves the above problems.　　The use of self-healing fuses for overcurrent protection in mobile power sources has become the first choice for engineers. Previously, chips were used to control overcurrent for pr

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Fuseless car charger, carefully burn your phone

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2023-04