How do you tell a capacitor is low ESR?

Discussion in 'General Electronics Chat' started by spinnaker, Dec 9, 2015.

  1. spinnaker

    Thread Starter AAC Fanatic!

    Oct 29, 2009
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    I have a datasheet that calls for a 10uf low ESR cap. How do you tell a capacitor is low ESR? Other than measuring it that is. Is there a marking that denotes low ESR? Or is it the cap type? For example the datasheet recommends tantalum as one of the types to use.

    What is considered a low ESR when measured?
     
  2. Papabravo

    Expert

    Feb 24, 2006
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  3. spinnaker

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    Bordodynov likes this.
  4. Lestraveled

    Well-Known Member

    May 19, 2014
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    A low ESR capacitor will run cooler than a high ESR cap and as a result, will last longer. The chart above is out of date. Today's low ESR caps are down in the single digit milli-ohms.
     
  5. hp1729

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    Nov 23, 2015
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    Consult the manufacturer's data sheets for the caps.
     
  6. bwilliams60

    Active Member

    Nov 18, 2012
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    Some of the better caps for low ESR are Panasonic, Rubycon and Nichicon. Watch for counterfeit caps, lots on the market.
     
  7. Techno Tronix

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    Jan 10, 2015
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    If a datasheet just says 'low ESR' without specifying a value, you are usually fine with any style of capacitor with a relatively low ESR. All this really means that you should avoid cheap unrated aluminum electrolytic capacitors, since their ESR is terribly high and can be several ohms.
     
  8. Dr.killjoy

    Well-Known Member

    Apr 28, 2013
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    When buying caps stay with name brands and buy from a electronics company cause most parts on eBay are fakes and poorly constructed.. Don't get me wrong I have alot of parts from eBay that work great but just understand the risk involved .. Do a search on mouser for low esr caps..
     
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