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August 13,2024

Principle of action of resettable fuse

　　　　The working principle of a resettable fuse is the dynamic balance of energy. The current flowing through the resettable fuse generates a certain degree of heat due to the thermal effect of the current (there is a resistance value in the resettable fuse). All or part of the heat generated is dissipated into the environment, but the remaining heat will increase the temperature of the resettable fuse element.　　During normal operation, the temperature is low and the heat generated and dissipated reaches equilibrium. When the resettable fuse is in a low resistance state, it does not work. When the current flowing through it increases or the ambient temperature rises, if the generated and dissipated heat reaches equilibrium, the fuse will remain inactive.　　If the current or temperature continues to rise at this time, the heat generated will be greater than the heat dissipation, causing a sharp increase in the temperature of the resettable fuse. Therefore, small temperature changes will l

September 18,2023

The current development status and pattern changes of the automotive fuse industry.automotive blade fuse specification

　　　　In daily life, automotive electronics can be seen everywhere, marking the development of a city. Therefore, the development of the automotive industry also drives the development of the fuse industry. Automotive insurance has a relatively rapid development in the industry.　　Therefore, driven by the trend of lightweight, miniaturization, intelligence, and electrification of automobiles, the overall market size of automotive fuses has grown rapidly. European and American countries have implemented mandatory regulations to improve the energy conservation, emission reduction, and safety performance of automobiles. The rise of consumer electronics has led to a gradual increase in consumer demand for the communication and entertainment functions of automobiles. Therefore, the growth rate of safety control and communication and entertainment electronics will be particularly high, and major automobile manufacturers will also prioritize automotive electronics in differentiated competition.　

October 14,2023

air conditioner fuse block pull-out.What is the breaking capacity of a fuse

　　　　As a safety component, in addition to its performance requirements, a fuse must also have strict safety requirements. The breaking capacity of a fuse is an important indicator reflecting the safety performance of the fuse. Its specific meaning is: the maximum short-circuit current that the fuse can withstand without any unsafe phenomena during the process of breaking the circuit. The unsafe phenomena here include - continuous arcing, smoking, spraying, splashing Burning, explosion, etc. Tubular fuses can be classified into high breaking (1500A), low breaking (35A or 10In), and enhanced breaking (150A) types based on their breaking capacity. The breaking capacity of chip fuses is generally between 30-60A, which is often overlooked or misunderstood by users or confused with the fusing characteristics of fuses, The correct understanding of the breaking capacity of a fuse should be that the extreme maximum current in the event of a short circuit in the protected circuit cannot exceed t

November 11,2023

air conditioner fuse block pull-out.What are the differences in performance and applications between slow blown fuses and fast blown fuses?

　　　　The main difference between slow fuse and fast fuse is its ability to withstand instantaneous pulse current, which means that it can withstand the impact of surge current when switching on and off the machine without action, thus 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 overcurr

November 08,2023

fast blow or slow blow fuse for amplifier.Technical standards for fuses

　　　　1. Rated zero power resistance　　PPTC thermistors should be packaged according to zero power resistance levels, and the resistance range should be indicated on the outer packaging. After the withstand voltage and current resistance tests, the change rate of the resistance before each group of samples is extremely poor δ| After Ri - Before Ri - (After Rj - Before Rj)/Before Rj | ≤ 100%　　2. PTC effect　　A material has a PTC (Positive Temperature Coefficient) effect, which means that the resistance of the material increases with increasing temperature. Most metal materials have the PTC effect. In these materials, the PTC effect is manifested as a linear increase in resistance with increasing temperature, which is commonly referred to as the linear PTC effect.　　3. Nonlinear PTC effect　　The material undergoing phase transformation will exhibit a phenomenon where the resistance rapidly increases by several to more than ten orders of magnitude along a narrow temperature range, known as the

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Fuseless car charger, carefully burn your phone

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2023-04