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How to choose electronic components correctly?Will not pick to hand over to YDY PCBA contractor package one-stop electronic processing

May 5, 2021

      Many friends who do electronic processing will face the problem of purchasing electronic components. If it is only the research and development team or the procurement personnel who do not know the processing, it will be a headache when choosing electronic components. Today YDY is going to give you popular science about how to choose and purchase electronic components.You can directly find YDY PCBA package labor package material one-stop electronic processing and assembly shipment.

latest company news about How to choose electronic components correctly?Will not pick to hand over to YDY PCBA contractor package one-stop electronic processing

First,The importance of the selection of electronic components

      The circuit diagram indicates the size, product model and basic parameters of each electronic component, which is the basis for the selection of electronic components.The products that have been formed, the electronic components on the circuit schematic diagram are put into production and processing after design, research and development, and each basic parameter is confirmed according to the method of "qualitative analysis, quantitative estimation, experimental adjustment".In general, whether the electronic components used can be disassembled or not.But for the electronic equipment researchers, amateur enthusiasts, maintenance staff, because of the objective reasons and many other factors, in accordance with the technical standards of the conditions, due to the use of less, but also flexible use of electronic components.

      In some special situations, even if there is a circuit schematic diagram, but in view of some electronic components marked with incomplete basic parameters, such as electrolytic capacitor capacity, not breakdown voltage, in the power supply circuit to reconsider;If the field conditions of commodity application do not conform to the technical data, part of the electronic components can be changed to integrate into the practice;Some electronic components are difficult to buy locally, can choose to meet the standard of electronic components;If an electronic component is detected to be unreasonable during maintenance, the appropriate electronic component must be replaced.

      Electronic components are basic circuit units that can not be disassembled and refined, such as resistors, semiconductor discrete components, semiconductor integrated circuit chips, microwave electronic components' auto relays' magnetic electronic components, control switches, electrical connectors, filters, temperature sensors, fiber optical components, etc.Practice has proved that in electronic products, 44%~67% of the total failure of electronic components is caused by improper selection, and the failure rate caused by the quality of electronic components themselves accounts for 33%~46%.Therefore, the selection of electronic components occupies a key position in the circuit design, and the design staff must attach great importance to it.


  • Second, the selection standard of electronic components

  • 1、Choose standard electronic components from manufacturers with stable quality, high credibility, promising prospects and good reputation that have been proved by practice. Eliminated or shoddy electronic components can not be used.

  • 2、The technical characteristics, quality grade and application conditions of electronic components should meet the requirements of the design circuit.

  • 3、in the case of meeting the performance indicators, the selection of low power consumption, low thermal resistance, low loss, high power gain, high efficiency of the electronic components.

  • 4、Selection of domestic electronic components.Select and select the electronic components that meet international standards after qualification authentication;After the application of honed compliance with the requirements of the stable delivery of electronic components;Other electronic components that have been successfully used and meet the requirements.

  • 5、Imported electronic components.Electronic components in PPL(commodity list for selection) and QPL(commodity list for quality identification) from overseas authorities;Highly reliable electronic components that have been rigorously screened during processing;After the domestic application of high - quality electronic components in line with the requirements.

  • 6、Selection should be in accordance with the principle of standardization and generalization.

  • Three, the selection of electronic components

  •       The electronic components are preferred and shall be subject to the preferred commodity manual or the preferred commodity list (PPL) issued by overseas authorities.Designers shall develop precise and clear technical specifications for the purchase of electronic components, which shall establish policies and methods for screening (including re-screening) and quality conformance inspection in order to ensure credibility requirements.At the same time, the purchasing order of electronic components should be prepared according to the requirements of model specifications.

  •      The factors that affect the credibility and quality of electronic components must be specified in the purchase order, such as quality level, environmental conditions, failure rate, technical specification, package type, precautions (anti-static characteristics, integrated IC protection processing technology, etc.), production supplier, etc.Procurement specifications should be reviewed before implementation.After the use of electronic components in the product is defined, its credibility should be estimated and whether it meets the credibility criteria of the circuit to the electronic components.