RE: ESR

["LOCKWOOD, Chris J." <clockwood-at-orbeng-dot-com.au> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

ESR is the effective series resistance. All capacitors exhibit some series
resistance. Low ESR caps are better than normal caps in high current pulse
applications, because the resistive component is lower, giving rise to a
lower power dissipation (important, when high currents are being run through
the cap), and better clamping of voltage spikes. This does not include the
effects of dielectric loss at HF. For TC applications <1MHz, these caps
would be perfect. They are usually used as input/output filters in
switchmode power converters (as found in TV sets etc...)

regards

Chris

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Friday, August 25, 2000 9:56 AM
To: tesla-at-pupman-dot-com
Subject: Re: ESR


Original poster: "BunnyKiller" <bigfoo39-at-telocity-dot-com> 

Tesla list wrote:

> Original poster: "Dan Kunkel" <dankunkel-at-hotmail-dot-com>
>
> Tesla Enthusiasts,
>
> I was looking through the Newark electroincs catalog and found some
suitable
> mmc caps. But they are described as low ESR. What does that mean? And as
> long as I have your attention...what does 'wvdc' as opposed to 'vdc'
> (obviously vdc means volts direct current) when refering to capacitors.
>
> Dan
> ________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail-dot-com

Hi Dan  ...

not to sure on ESR    but WVDC = working voltage DC
a.k.a. the normal working voltage of the designed curciut

one can consider the wvdc the same as a vdc

if you are looking for a MMC cap remember to divide the VDC by .707 to
assume a
value for AC usage

Scot D




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