[sdiy] Typical ESR of different capacitors

Noah Vawter nvawter at media.mit.edu
Wed Sep 1 17:09:06 CEST 2010

	This paper on photoflash and strobe capacitors considers frequencies  
up to 6kHz.  It models the ESR as the sum of several frequency- 
dependent sources, and has some cool SEM pictures:


On Sep 1, 2010, at 10:43 AM, Antti Huovilainen wrote:

> On Wed, 1 Sep 2010, Gergo Palatinszky wrote:
>> I've found:
>> Check the table here:
>> http://my.execpc.com/~endlr/esr.html
>> click the pic at the bottom as well
> Thanks. That provided some help, but unfortunately the table and  
> figure are flawed as they use different frequencies for the  
> measurements and assume ESR is constant over frequency (which it  
> isn't due to dissipation factor as far as I've been able to  
> understand). Almost all the data I found seemed to assume that  
> normal electrolytics would only ever be used as main PSU filter caps  
> and never for any further filtering where higher frequencies were  
> important.
> Antti
> "No boom today. Boom tomorrow. There's always a boom tomorrow"
>  -- Lt. Cmdr. Ivanova
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