XPost: sci.electronics.design   
   From: cd@notformail.com   
      
   On Mon, 4 Mar 2024 17:00:26 +0000, liz@poppyrecords.invalid.invalid   
   (Liz Tuddenham) wrote:   
      
   >Cursitor Doom  wrote:   
   >   
   >[...]   
   >> But then how do you determine - given that electrolytics come in all   
   >> sorts of votlage and temperature ratings, capacitance values etc - how   
   >> much leakage current in each case is "too much" leakage current   
   >> rendering the cap unsuitable for use?   
   >   
   >According to the Post Office Elelctrical Engineers' Journal (July 1962   
   >p120) the leakage should be less than 5,000 ohm-farads for electrolytic   
   >capacitors to be accepted for use in undersea cable repeaters.  If your   
   >capacitor is 47,000 microfarads (0.047F), that leakage current would be   
   >equivalent to about 100k  i.e. 0.1 milliamps at 10v.   
   >   
   >For general domestic use, leakage figures at least 10 times greater than   
   >that are usually acceptable.   
      
   Seems pretty definitive. Thanks, Liz.   
      
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