Sunday, 30 October 2016

identification - What are markings on top of electrolytic capacitors?


I often see a marking like the following pattern on the top of radial PTH elcos.



alt text


What does it mean? Is it an identification of the manufacturer?



Answer



I believe they are vents when the pressure inside a capacitor would build up due to heating of some sort. It will pop open instead of just blowing up.


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