About the choice of the hole size of PCB plate

- Nov 17, 2018-

Combined with MDA-EDA PCB electronic thermal simulation solution

As the function of electronic products becomes more and more complex, the power consumption increases.The heat generated by the system is also increasing, while the integration density of PCB is increasing.According to relevant data, the area of PCB board has been reduced by half, while the integrated components on board have increased by 3.5 times, and the integration density of the whole PCB board has increased by 7 times.PCB boards and systems are moving toward higher density, faster speed, and greater heat generation.In addition, thermal simulation will become an indispensable step in the design process of electronic PCB as the problems caused by overheat of circuit board are more and more concerned.The traditional thermal simulation test mainly focuses on the selection of the size of the hole in the PCB plate

Usually R external diameter - R internal diameter >=8mil(0.2mm)

It is generally recommended that the outer diameter should be 1MM, the inner diameter 0.3-0.5mm, and for the tight circuit, the outer diameter should be 0.6mm and the inner diameter should be 0.4-0.2mm

There is no absolute standard for making a PCB

Large current can make the outside diameter bigger, the hole can be small.However, PCB manufacturers generally recommend using a 0.5mm diameter, as they use a 0.5mm diameter.The rotation less than 0.5mm is easy to break.