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August 16,2023

Three major factors affecting the lifespan of fuses.max fuse size meaning

　　　　1. Working environment temperature: Excessive ambient temperature can damage the lifespan of fuses. Slow melting fuses, such as tin ball type, begin to diffuse towards the metal wire when the temperature is about 160 ℃ (150-170 ℃); The temperature at which the melt of a fast melting fuse begins to undergo severe oxidation is approximately 200 ℃ (175-225 ℃). With the oxidation of the fuse from the outside to the inside, multiple diffusion, thermal stress fatigue, etc., the lifespan of the fuse will gradually shorten. Therefore, it is recommended that the delay type fuse fuse should not work above 150 ℃ for a long time, and the fast melting type fuse should not work above 175~225 ℃ for a long time.　　2. Pulse current: Pulse impact can generate thermal cycling, leading to diffusion, oxidation, thermal stress, and even acceleration of the fuse. The fuse will gradually age with increasing pulse energy and frequency. The impact resistance life of a fuse depends on the percentage of I2t of

September 20,2023

What are the differences between TVS diodes and voltage regulator diodes.reset motor thermostat on shark vacuum

　　　　In circuit applications, the application range of diodes is becoming increasingly widespread, among which TVS diodes and voltage regulator diodes are more common. Many people are not very clear about these two. Today, the editor leads everyone to re understand them.　　From a definition perspective, TVS diode is an efficient circuit protection device developed on the basis of voltage regulator technology. Its circuit symbol and appearance are the same as ordinary voltage regulator diodes; Zener diode, also known as Zener diode, refers to the phenomenon of using a pn junction to reverse breakdown state, and its current can change over a large range while the voltage remains basically unchanged, making it a diode that plays a stabilizing role. (Related reading: Principles and Introduction of Transient Suppression Diodes (TVS))　　In principle, when the two ends of a TVS tube are subjected to instantaneous high-energy shocks, it can suddenly reduce its impedance at a very high speed (up t

July 04,2023

Working principle of fuses

　　　　When current flows through a conductor, it will generate heat due to the presence of a certain resistance in the conductor. And the calorific value follows this formula: Q=0.24I2RT; Where Q is the heat generated, 0.24 is a constant, I is the current flowing through the conductor, R is the resistance of the conductor, and T is the time for the current to flow through the conductor; Based on this formula, we can easily see the simple working principle of a fuse. When the material and shape of the fuse are determined, its resistance R is relatively determined (without considering its resistance temperature coefficient). When an electric current flows through it, it generates heat, and as time increases, its heat also increases. The magnitude of current and resistance determines the rate of heat generation, while the construction and installation of a fuse determine the rate of heat dissipation. If the rate of heat generation is less than the rate of heat dissipation, the fuse will not

November 10,2023

bs 1362 fuse operation characteristics.The difference between self recovery fuse and blown fuse

　　　　In the circuit protection scheme, is it better to choose a self recovery fuse or a blown fuse for overcurrent protection? This issue has always been a serious issue that electronic security engineers must take seriously, and it is also one of the many questions that buyers consult with. In smart consumer electronics products (such as computers, smartphones, tablets, etc.), circuit protection design requires the use of self-healing fuses. If a blown fuse is used, it needs to be replaced every time abnormal overcurrent occurs, which is unacceptable to end users. In situations where safety needs to be prioritized or damage to other downstream circuit equipment needs to be avoided, it is better to choose a fused fuse. In case of a fault, completely cutting off the current is beneficial for fault diagnosis.　　So, what is the difference between a self restoring fuse and a blown fuse? Dongwo Electronics, a comprehensive manufacturer of circuit protection components, has rich practical appl

August 01,2023

Selection and Differences between Quick Break Fuses and Slow Break Fuses.plastic fuse board

　　　　The quick break fuse tube is generally used in the circuit of resistive load, such as electric kettle, electric stove, and Space heater with electric heating wire. Because the electric heating wire is a resistive load, and the working current of resistive load is basically unchanged, the quick break (quick fuse) fuse is required. Alternatively, quick break fuses may also be used in circuits that require the protection of sensitive and valuable devices such as ICs. When the load experiences a short circuit, it is necessary to fuse it in a timely manner for protection.　　Slow break fuses, also known as delay fuses, are mainly used for inductive or capacitive loads, such as square fuses, circular fuses, plastic encapsulated miniature fuses, which are generally very common in switching power supplies. In the switching power supply, there is a Electrolytic capacitor with a very large capacity. When the capacitor is first powered on, it is close to short circuit, and its charging current

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Fuseless car charger, carefully burn your phone

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