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　　　　Surface mount fuse is a widely used protective component in electronic circuits.　　Structurally speaking, patch fuses are compact in size and typically flat in shape. They are designed to be suitable for surface mount technology (SMT) and can be easily installed on printed circuit boards (PCBs). This compact structure gives it a unique advantage in the trend of miniaturization in modern electronic devices, effectively saving space on circuit boards.　　Its working principle is based on the thermal effect of electric current. When the current in the circuit exceeds the rated current of the patch fuse, the resistance wire inside the fuse will heat up, and as the heat accumulates, the temperature of the resistance wire will rapidly rise. When the temperature reaches the melting temperature of the fuse, the resistance wire will melt, thereby cutting off the circuit and protecting other components in the circuit.　　In terms of application fields, patch fuses are very common in various consu

November 07,2023

temperature balance quilted mattress protector.Calculation Method for Melt Current of Fuse Fuses

　　　　The current of a fuse includes two aspects, one is the rated current of the fuse tube, and the other is the rated current of the melt, which cannot be confused.　　1. Melt current for direct starting of a single motor IRNIRN ≥ Iq/K (A)... (l) IRN Melt rated current (A) Iq Motor starting current (A) K-coefficient or IRN=(1.5-2.5) IH (A)... (2) In the formula, IH Motor rated current (A) or 380V (AC) IRN=7PH (A)... (3) 22OV (AC) IRN=12PH (A)... (4) In the formula: PH Motor rated power (kW)　　2. Multiple motors in the distribution main line (with several units), with a total fuse IRN=(1.5-2.5) IHmax+I (n-1) (A)... (5) In the formula: IHmax - The rated current of the largest motor or motor group that starts simultaneously I (n-1) - The sum of the rated currents of other motors except for the largest motor group or motor group that starts simultaneously, or IRN=I (n-l)+Iqmax/2.5 (A)... (6) In the formula: Iqmax - The maximum starting current of one motor (A) or IRN=K1 [Iqmax I (n-l)] (A)...

August 03,2023

Waterproof fuse holder and its electroplating treatment.resettable fuse symbol

The design and development of waterproof fuse holders are aimed at better installation and replacement of individual fuses. When installing fuses, we need to use some necessary equipment. Only after the equipment is completed can we ensure a smoother installation of the fuse. When installing equipment, we should use waterproof fuse holders because without this equipment, we cannot install fuses on the products we need.When studying fuses, we usually take a look at the waterproof fuse holder. Due to different integrations being installed on different circuit boards, if the circuit boards are different, then the waterproof fuse holder we choose should be different. The installation position is different, and the waterproof fuse holder we choose should be different.The fuse holder can be divided into panel mounted fuse holders, PCB (hard) board fuse holders, automatic plug-in fuse holders, and plug-in fuse holders. The fuse holder must include requirements for resistance to current, volta

September 20,2023

The Protection Application of Self Recovery Fuses in Sweepers.mini cooper fuse box symbols meaning

　　　　With the rapid development of modern technology, a large number of products can only be integrated into our daily lives, and the broom is one of them. As a smart home product, floor sweepers are not uncommon in first tier cities in China. The working principle of a floor sweeper is not too difficult to understand, mainly relying on the drive of internal small motors to provide power. Due to unstable voltage or jamming during operation, the motor may encounter problems such as rotor blockage, overload, or even burning out. So the internal motor must be designed with corresponding protection circuits to ensure its reliability and stability of operation.　　There are many types of protection methods for small motors inside the sweeping machine. Previously, bimetallic temperature controllers were commonly used. When the motor was working, if the coil temperature increased, the circuit would be disconnected, and after the temperature decreased, it would be connected again. However, this m

December 25,2023

plastic fuse box under stairs.Precautions for the application of self restoring fuses

　　　　Easy to install:　　The WH self resetting overcurrent protector has no polarity and can be connected in series to the circuit that needs protection. It is not only widely used, but also safe and reliable.　　Reuse:　　After cutting off the power and troubleshooting, it automatically returns to normal state without the need for manual replacement and can be reused.　　Improving quality:　　It can improve the quality of customer products, greatly reduce the natural damage rate of finished products, and greatly extend the service life of products.　　No reconnection:　　Under fault conditions, the faulty circuit will not be reconnected (other protective circuits, bimetallic plates, etc. will be repeatedly reconnected to expand the fault range).　　Add highlights:　　Due to the addition of high-tech elements, it can add new shining points to customer products, making vulnerable circuits no longer fragile.　　Reduce costs:　　Reduce the number of components, PCB area, and damage during operation compared to

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Fuseless car charger, carefully burn your phone

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2023-04