Less than 1% of formal production plants An industry insider said that the Beijing neon market has nearly 1,000 companies, and the production workshops are mostly concentrated in the urban-rural integration. In Daxing Xihongmen, Chaoyang Gaobeidian and other places, there are many small workshops that are “workshop styleâ€. Most of the heads of these “workshops†are factory directors, technical directors and salesmen. They usually undertake projects outside and receive a few familiar friends after receiving them. In addition, some people do not even have "workshops". They rely on "fake" means to contract business in the name of a formal large factory. After receiving the work, they will subcontract the project to those "workshops." It is this kind of production mode that is increasingly “prosperousâ€, which has led to the phenomenon of “the lack of arms and broken legs†in the neon lights in Beijing. In this regard, Ma Gencheng, director of the Neon Lamp Production Professional Committee of the China Lighting Association, recently pointed out that in the neon engineering production industry, the above phenomenon does exist. "There are nearly 1,000 neon manufacturers in Beijing, and there are no more than 10 formal ones. Most of the rest are hand workshops. These neon 'guerrillas' mainly undertake some small projects. The products that are made are not the unqualified lamps or the installation of billboards. Such a billboard stood up and it was bright at the time, but it will soon be a problem. According to Ma Gencheng, the quality of neon lights is related to three aspects: material selection, processing technology, and installation process. Neon billboards are made up of neon tubes, neon transformers (inductors, electronics), controllers, distribution cabinets, structural components of neon devices, lightning protection devices, etc., which are assembled and connected by system. The above-mentioned elements that make up the system are the basic sources that affect its quality. Among them, the quality of neon tubes, the quality of neon (inductive, electronic) transformers, and the installation quality of neon devices have the greatest impact on neon engineering. The quality of the installation directly determines the reliability and service life of the billboard. “For the simplest example, the neon tube is on the front, behind the metal support, and then on the transformer. The neon tube leads from the metal support and the transformer. According to the regulations, these wires are insulated. Fixed on metal shelves, there are also requirements for how to route. However, in order to save trouble, some small factories do not directly connect the wires. The wind blows, the wires and the metal shelves rub, and the outer insulation layer is not long. So in the bad weather of wind and rain, people can often see, sparks flash, neon signs will be partially dark." The establishment of the access system can not be delayed, in order to understand the industry, not long ago, China Lighting The Electrical Association's Neon Production Professional Committee was established in Beijing. Ma Gencheng said that strengthening supervision of the industry is an important measure to regulate the neon market. In response to some problems in the neon industry, China has recently released the "National Requirements and Safety Requirements for Neon Tubes" and "Neon Installation Specifications". In the future, the national standard will be issued for the certification of neon products. Neon material supplier industry to develop management methods. At the same time, Ma Gencheng also pointed out that the qualification of the neon installation company is one of the solutions to this problem. “Dalian, Tianjin and other cities stipulate that neon project contracts must be confirmed by neon-related industry associations when signing, which will prevent those companies that are not qualified to pass the low quotation and use unqualified products.†It is reported that the current China Lighting Association is responsible for neon production. The committee is considering setting up a neon engineering supervision company, and plans to hire technical personnel with professional knowledge as supervisors to ensure that the entire neon project meets technical standards.
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The diameter of the DO-41 diode body is in the range of 2.0mm~2.7mm, the length of the diode body is between 4~5.2mm, the diameter of the pins at both ends is between 0.71mm~0.86mm, and the overall length is 25.4mm.
This DO-41 plastic package is available in a through-hole version. This axial lead device is ideal for customer premises equipment (CPE), such as telephones, answering machines, modems, and fax interfaces. When appropriate over-current protection is included, the DO-41 package series can also be used for over-voltage protection in applications such as T1/E1/J1 relay cards.
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