This issue involves some complex knowledge points, and the knowledge of resistance package size is quite extensive, so I can't say it is completely covered, but I can explain some key concepts, such as package type, package size, lead spacing, lead width, pcb assembly, and resistance precision.
About the type of resistance packaging, the general resistance has 0201, 0402, 0603, 0805, 1206, 1210 and 2512 and other packaging types, among which the size of each package type is different, that is to say, different packaging types of resistance size is not the same. In addition, lead spacing is also different, in general, 0201 package resistance lead spacing is minimum, 2512 package resistance lead spacing is maximum.
The resistance package size mainly has 1206, 0603, 0402, 0201 four kinds. The 1206 package size is 3.2mm×1.6mm, the 0603 package size is 1.6mm×0.8mm, the 0402 package size is 1mm×0.5mm, and the 0201 package size is 0.6mm×0.3mm.
In addition, different package sizes of resistance lead width is also different, in general, 0201 package resistance lead width is the smallest, 2512 package resistance lead width is the largest. In addition, different encapsulation types of resistors have different precision. Generally speaking, 0201 encapsulation has the highest precision and 2512 encapsulation has the lowest precision.
In addition to the size information of resistance packaging mentioned above, there are some unique characteristics of resistance packaging, such as some packages have very low noise performance, and some packages have vibration resistance, high temperature resistance and other characteristics, you can choose different packaging types of resistance according to the needs of the application.
In general, the selection of resistance package size is very important, need to consider the size of different package types, lead spacing, lead width, resistance precision, noise performance, vibration resistance, high temperature resistance and other characteristics, only comprehensive consideration, can choose the most appropriate resistance package type.
For the resistance package size knowledge, there are a number of other concepts, such as leakage current, insulation, durability and thermal sensitivity, should be considered as a factor in the selection of resistance package size.
In addition, there are some technical standards related to the resistance package size, such as IEC and JIS standards, as the resistance package size selection, need to carefully understand the specific requirements to ensure the reliability of the design.
To sum up, when choosing the size of resistance package, it is necessary to consider the characteristics of resistance package size, lead spacing, lead width, resistance accuracy, noise performance, vibration resistance, high temperature resistance, and IEC and JIS standards, so as to ensure the reliability of the design.
In addition, when selecting the resistance package size, special consideration should be given to the application scenario, such as the grounding system's requirements for flyback buffer circuit application. Adjusting the resistance package size can help improve the efficiency and reliability of the entire grounding system.
Packaging is a technique and a way of manufacturing electronic components that encapsulate them in a shell, plastic or metal case that can effectively protect the electronic components and facilitate arrangement on the assembly plate. Now there are many common packaging forms, such as plug-in packaging, shell packaging, IC packaging, module packaging, resistance packaging and so on.