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September 23,2023

How to Choose the Rated Voltage and Current of Chip Fuses.30 amp screw in resettable fuse

　　　　How to choose the rated voltage and current of a patch fuse: The rated voltage of a patch fuse depends on the current flowing through it, and is not related to the working voltage of the circuit. From the perspective of safe use, the rated voltage of SMD fuse is proposed, which is the highest working voltage of the circuit when the SMD fuse is in a safe working state. This means that fuses can only be placed in circuits with a working voltage less than or equal to the rated voltage of the fuse. Only in this way can the fuse operate safely and effectively.　　The voltage drop at both ends of the patch fuse is very small, much lower than the rated voltage of the patch fuse. Therefore, during normal operation, the rated voltage has no practical significance. The true significance of the rated voltage of patch fuses lies in their safety performance. Chip fuse, as a safety component, must be relatively safe during normal operation, protective action, and any time period after melting. The

October 28,2023

waterproof fuse block.Why do fuses have high resistivity

　　　　A fuse is a wire made of lead antimony alloy with a lower melting point and a lower resistivity. The more voltage constant resistance can be compared, the more it can detect micro current resistance that exceeds the working range. A high current is required to fuse the resistance, which can burn out the electrical appliance and prevent it from melting. Some principles use the current thermal effect fuse to control the current flow and allow the current to flow. According to the formula Q=IRT, the resistance produces more heat and is easier to fuse for safety and protection. It has a certain relationship with Joule's law, but things in life are not so simple. Fuses cannot be too large or small. If they are too large, they can easily burn down household wires and even cause fires. If they are too small, they can easily fuse and cause unnecessary trouble.　　A fuse can directly see the principle of a wire. The rated current of a fuse is the same as that of a wire. Even if it can be seen

July 19,2023

Glass sealed fuse.auto fuse block

　　　　The rated current values usually include 100mA, 200mA, 315mA, 400mA, 500mA, 630mA, 800mA, 1A, 1.6A, 2A, 2.5A, 3.15A, 4A, 5A, 6.3A, etc. Generally, the rated current values of various fuses are provided based on customer needs and actual purposes.　　The nominal working voltage of a fuse, codenamed Un, is generally rated at 32V, 60V, 125V, 250V, 300V, 500V, and 600V. Fuses can be used at a voltage not exceeding their rated voltage, but are generally not approved for use in circuits with a circuit voltage greater than the rated voltage of the fuse.　　When the rated current is applied to the fuse, the voltage measured at both ends of the fuse when the fuse reaches Thermal equilibrium, that is, when the temperature is stabilized, is Ud. Due to the voltage drop at both ends of the fuse having a certain impact on the circuit, there are clear provisions for voltage drop in European regulations.　　Usually divided into cold resistance and hot resistance, cold resistance is the resistance value

September 14,2023

The Use Value of Self Recovery Fuses on Tablets.plug fuse keeps blowing

　　　　What are the benefits of using self restoring fuses? The application of self-healing fuses as a protective circuit for tablet lithium-ion batteries not only reduces or avoids various natural or human factors that may cause damage and damage to the battery, but also heats up, damages or explodes during overcharging and discharging. The main purpose of applying PPTC to the USB interface is to prevent USB load short circuits from burning out the control circuit of the tablet At the same time, it also avoids accidentally inputting current to burn out the internal circuits of the tablet computer.　　The above applications can reduce economic losses and honor losses to manufacturers and sellers, and require fewer protective components with low cost, simple and reliable design. They can also save maintenance and repair costs for customers, improve product quality and customer reputation, and increase market competition advantages.　　In addition to applying a self restoring fuse protection sc

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

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Operating parameters of automobile fuse holder

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2023-04