Where to Buy Capacitors

Discussion in 'General Electronics Chat' started by wkumtrider, Jul 14, 2009.

  1. wkumtrider

    Thread Starter Member

    Jun 3, 2009
    14
    0
    Where do you buy your capacitors? I am looking for a 0.47uf 200V (AC) capacitor and I can't find one. I've looked at Digi-key, Mouser, Allied, Radio Shack. NO one has one. Any recommendations will be appreciated.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Any non-polar capacitor can handle AC. Try a Digi part #495-2453 @ $1.06. That is a polyester film capacitor that is rated for 400 volts to give some overhead for safety.
     
  3. wkumtrider

    Thread Starter Member

    Jun 3, 2009
    14
    0
    Thanks Beenthere. If not listed in the specs, how do you know if it is polar or non-polar?
     
  4. someonesdad

    Senior Member

    Jul 7, 2009
    1,585
    141
    After my wife throws a capacitor at me, it's polar if it's traveling north/south and non-polar otherwise. :)

    Seriously, polar capacitors are those that have terminals marked with the polarity of voltage that should be applied to them -- due to their construction, they work with only one polarity. Electrolytic capacitors are the typical example.

    Non-polar capacitors are made with a dielectric that can be biased either way.
     
  5. wkumtrider

    Thread Starter Member

    Jun 3, 2009
    14
    0
    Are ceramic capacitors generally non-polar?
     
  6. sissow2

    Member

    Jul 14, 2009
    16
    0
    Yes. I have yet to see a polar ceramic cap.
     
  7. wkumtrider

    Thread Starter Member

    Jun 3, 2009
    14
    0
    Thanks sissow2. I'm new to capacitors and trying to learn as much as possible.
     
  8. bertus

    Administrator

    Apr 5, 2008
    15,638
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