LED display screen is a display screen composed of multiple LED array screens, each LED array unit consists of an equal number of LED particles to form a small screen. Each unit LED screen has an independent driving circuit, and the driving signal is distributed by the signal distribution circuit. In an LED screen, there is usually one or several power supplies that supply power to each driver circuit board, and each power supply needs to supply power to multiple LED array units. This is a special solution to reduce power supply costs. In this power supply scheme, each unit of LED screen is the load of the power supply In the operation of the display screen, if any one of the screens experiences a short circuit, overcurrent, or overheating, it will cause the main power supply to not work and cause the entire LED screen to be paralyzed. To avoid this situation, it is necessary to install an overcurrent temperature protection circuit for each unit screen, and the power supply itsel
It has become an inevitable trend for self recovery fuses to replace traditional fuses for overcurrent protection in digital photo frames. Traditional fuses need to be replaced when they break, while self recovery fuses do not need to be replaced. This is the advantage of self recovery fuses for overcurrent protection in digital photo frames. Moreover, other overcurrent protection circuits cannot replace the simplicity, reliability, and low cost of self recovery fuses. Overcurrent protection devices are indispensable in digital photo frames. Previously, most designs used disposable fuses, and whether they were selected according to UL standards or IEC standards, they were easily broken and replaced once. However, nowadays, whether the fuse is broken or not, users will determine quality issues and return or claim compensation So engineers have to choose a higher current one, which usually won't break. When the fuse breaks, the digital photo frame system also burns out. The applica
Electronic ballast fluorescent lamps and energy-saving lamps are recognized as green lighting products promoted by national policies. They not only have significant energy-saving effects (80% energy-saving compared to incandescent lamps and 50% energy-saving compared to inductive ballasts), but also have many obvious advantages such as high light efficiency, no flicker, good color rendering, uniform light distribution, and no eye burns; However, some electronic ballasts also have the disadvantage of high failure rates. Electronic ballasts can be damaged due to poor contact at the fluorescent lamp pins, blackening at one end of the lamp tube, breakage of the lamp tube, broken filament, and deactivation of the lamp tube. This is not only strictly prohibited by the national standard GB15143, but also endangers personal and property safety. At the same time, GB15143-94 "11, 14" and GB15144-94 "5.13" sections provide abnormal state tests for electronic rectifiers, including lamp open
How to choose between traditional disposable fuses and self restoring fuses, as there are significant differences between these two components? Next, we will provide a detailed introduction to the advantages of these two types of fuses, making it easier for everyone to better understand these two products and choose the fuse they need. Many designs such as computers, peripheral devices, and portable devices (such as smartphones, tablets, etc.) require the use of self recovery fuses because the self recovery function provided by self recovery fuses is more suitable for use. If ordinary disposable fuses are used, they need to be replaced every time the circuit is abnormal or overloaded, and replacing fuses for these products is very troublesome. Therefore, using self restoring fuses on these products can not only protect the product's service life, but also improve usage efficiency. The principle of self restoring fuses is to limit potentially harmful overload currents within a saf
When a fuse is energized, the heat converted from electrical energy causes the temperature of the melt to rise. When normal working current or allowable overload current passes through, the heat generated is radiated to the surrounding environment through the melt or shell, and the heat dissipated through convection, conduction, and other means gradually reaches a balance with the heat generated. If the generated heat is greater than the dissipated heat, the excess heat gradually accumulates on the melt, causing the temperature of the melt to rise; When the temperature reaches or exceeds the melting point of the melt, it will cause the melt to melt, fuse, and cut off the current, playing a role in safety protection of the circuit. 1. Divided into: φ 2 φ 3 φ 4 φ 5 φ 6 and others. 2. According to the fuse characteristics, it is divided into fast fuse type, medium delay fuse type, and delay fuse type. (It can also be divided into express and strong delay). 3. According to the break
1. Rated current: The nominal working current of the fuse tube (the maximum current that a fuse can maintain normal operation for a long time under normal conditions). 2. Rated voltage: The nominal working voltage of a fuse (the maximum voltage that the fuse can safely withstand at the moment of disconnection). When selecting a fuse, the rated voltage of the selected fuse should be greater than the input voltage of the protected circuit. 3. Breaking capacity: When a large overload current (such as a strong short circuit) occurs in a circuit, the fuse can safely cut off (break) the maximum current of the circuit. It is a safety indicator for fuses. Safe breaking refers to the phenomenon of avoiding splashing, burning, explosion, and other hazards to surrounding components, components, and even personal safety in the breaking circuit. 4. Overload capacity (carrying capacity): The maximum overload current that a fuse can maintain for a specified period of time. When the current flo
1. When operating at a normal operating current of 25 ℃, the current rating of the current fuse is usually reduced by 25% to avoid harmful melting. Most traditional fuses use materials with lower melting temperatures. Therefore, this type of fuse is relatively sensitive to changes in environmental temperature. For example, a current fuse with a current rating of 10A is usually not recommended to operate at an ambient temperature of 25 ℃ and a current greater than 7.5A. The voltage rating of the current fuse must be equal to or greater than the effective circuit voltage. The general standard voltage rating series are 32V, 125V, 250V, and 600V. The resistance of the fuse is not important in the entire circuit. Due to the fact that the resistance of a fuse with an amperage less than 1 is only a few ohms, this issue should be considered when using fuses in low-voltage circuits. Most fuses are made of materials with a positive temperature coefficient, so there are two types of resisto
2410 disposable fuse patch type, small size, easy to weld, new structure and process, can effectively improve the common end cap looseness and performance dispersion of products; Lead free and halogen-free, meeting environmental requirements. Mainly used in AC applications such as solid-state lighting, AC/DC power supplies, electronic ballasts, and small household appliances The domestic disposable fuse has a volume of 0402-2410, rated voltages of 125V, 72V, 63V, 32V, and rated currents of 0.5A-30A. Domestic disposable blown fuses can be widely used in products such as laptops, PDP televisions, LCD displays, LEDs, PDP panels, LCD backlight inverters, portable DVD players, PC network servers, electrical systems, wireless base stations, white appliances, game consoles, office automation equipment, industrial equipment battery charging protectors, and so on. In recent years, with the progress of domestic fuse production technology and the advancement of trade globalization, domesti
The main difference between slow fuse and fast fuse is their ability to withstand instantaneous pulse current, which means that they can withstand the impact of surge current when switching on and off, 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. Product features: Disposable function: After a circuit fault occurs, the fuse opens, the equipment stops running, and responds quickly to the fault current. It cannot be reused Small size: The compact design saves circuit board space. Chip packaging: suitable for reflow soldering, easy and fast to use. Easy installation: The fuse has no polarity and can be connected in series to the circuit
1. How much current can a fuse flow through? The rated current is the current value that Shenzhen fuses can operate for a long time, not the operating current. Due to safety issues related to fuses, they are considered safety devices and must pass relevant certifications before they can be produced and sold. Usually, safety regulations require that the temperature of a fuse should not exceed the allowable value when operating at its rated current. For example, UL specifies that the temperature should not exceed 75 ℃ when operating at 100% rated current. The safety regulations also impose strict requirements on the fusing time when the actual current exceeds the rated current. For example, when a certain specification of fuse is given at 1.5 times the rated current, the fuse can operate continuously for 60 minutes; At 2.1 times the rated current, it can work continuously for 2 minutes; At 2.75 times the rated current, it can work for less than 400ms ($1.7100) and more than 10s;
With the progress and development of the times, more and more new products will be introduced, bringing forth new ideas. Multiple analysts predict that China's electronics industry will maintain growth above the global average. As a key component of electronic and electrical protection devices, the market demand for fuses will always exist and continue to grow, and the market will have more requirements for the functionality of fuses. Industrial development has caused damage to the environment, and in turn, progress in human understanding of nature and society has put forward requirements for environmental protection. Only a good living environment can ensure a better life and long-term development for humanity. The lead-free requirement for small fuses is a priority proposed by Europe and Japan. Starting from 2006, parts containing six elements such as lead, cadmium, and mercury will no longer be used. Many companies have started to demand suppliers, and some have expanded the pr
Basic knowledge and common fuse specifications of fuse wire base fuses In many electronic devices, fuses are indispensable. Since Edison invented the After the first plug-in fuse with a thin wire enclosed in the lamp holder, there are more and more types of fuses and their applications are becoming 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 curre
MB:+86 13924633629 Ms.vicky
E-mail: waimao@xcfuse.com
Factory :
XC Electronics(Shenzhen)Corp.,LTD
Add: Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
Shenzhen branch: Shenzhen Xucheng Electronic Commerce co.Ltd
Add: 8-15 Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
