Today, the Topband visited our factory for the annual factory audit. The company is a global leading provider of intelligent control technology, we have established a partnership with them for more than 15 years."
In many electronic devices, fuses are indispensable. Since Edison invented the first plug-in fuse in the 1890s, which enclosed thin wires in a lamp holder, the types of fuses have become more and more diverse, and their applications have become more and more widespread. Here are some common knowledge on fuse parameters, selection, and application. The rated values and performance indicators of fuses are determined based on laboratory conditions and acceptance specifications. There are multiple authoritative testing and appraisal institutions internationally, such as UL certification from Underwriters Laboratories in the United States, CSA certification from the Canadian Standards Association, MTTI certification from the Japan Department of International Trade and Industry, and ICE certification from the International Electrotechnical Commission. The selection of fuses involves the following factors: 1. Normal operating current. 2. The applied voltage applied to the fuse. 3. Abnorma
1. Factors that affect the lifespan of fuses: Working environment temperature: Excessive ambient temperature can damage the lifespan of the fuse. Delay type (slow melting type) fuses, such as tin ball type, begin to diffuse towards the metal wire when the temperature is about (150-170 ℃); The temperature at which the fusible metal wire of a quick fuse begins to undergo severe oxidation is approximately (175-225 ℃). 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. Pulse current: Continuous 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. Normally, it should be less than 20% to ensure that the fuse can withstand more than 100000 impacts. Other: For example, the length and cross-sectional area of t
The first function of a patch fuse is protection, which means that when protection is needed, the patch fuse should play a role. This is also the first consideration when choosing a patch fuse. In general, the rated current of a fuse must be greater than the normal working current of the circuit and have a certain overload capacity. However, if the margin is too large, it will reduce or weaken its protective function. When a patch fuse should be activated, it should not act, causing damage to the protected components or even more serious dangerous consequences. The main reference tool for designers when selecting patch fuses is the "time current characteristic curve" in the product specifications provided by the fuse manufacturer. Choosing the appropriate type of SMD fuse with appropriate fusing characteristics and the appropriate rated current specification can meet the protection function of the fuse. The second function of SMD fuses is their load-bearing function, which is com
Application of Self Recovery Fuse in RS485 Communication Port Lightning Protection RS485, as one of the most commonly used serial differential communication methods in the industry, adopts a balanced transmission and differential reception method, which has the ability to suppress common mode interference. Due to its long communication distance (over 1200m), high transmission rate (10Mbps), high signal-to-noise ratio, convenient control, low cost, and the ability to achieve multiple nodes on a single bus, as well as the variety of transceivers that can be used, RS485 has the advantages of being able to suppress common mode interference, It has been increasingly recognized by users. However, with the increase in usage frequency, the problems encountered are also increasing day by day. Due to the fact that RS485 communication transmission lines are usually exposed outdoors, lightning and electrostatic interference have become common problems in practical engineering of RS485 commun
In low-voltage distribution systems, fuses are a type of electrical appliance that plays a safety protection role. Fuses are widely used for power grid protection and electrical equipment protection. When a short circuit fault or overload occurs in the power grid or electrical equipment, they can automatically cut off the circuit to avoid damage to electrical equipment and prevent accidents from spreading. A fuse is composed of an insulation base (or support component), contacts, melt, etc. The melt is the main working part of the fuse. The melt is equivalent to a special section of wire connected in series in a circuit. When a short circuit or overload occurs in the circuit, the current is too high, and the melt melts due to overheating, thereby cutting off the circuit. Melts are often made into filaments, grids, or sheets. Melt materials have the characteristics of relatively low melting point, stable characteristics, and easy melting. Generally, lead-tin alloy, silver plated co