Tantalum capacitor polarized?

Discussion in 'General Electronics Chat' started by xnihilo, Jan 8, 2009.

  1. xnihilo

    Thread Starter Active Member

    Nov 20, 2008
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    0
    Hello,

    Is a tantalum capacitor polarized? If so how do I know what is the cathode and what is the anode?

    Thanks!
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
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    Always. Look for the markings, they might be small, but they are there.
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Tantalums usually have the positive side marked.
     
  4. Wendy

    Moderator

    Mar 24, 2008
    20,766
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    One other thing to mention, they are not fireproof. Get it wrong and they can light up like a match head. Good parts other than that.
     
  5. eblc1388

    Senior Member

    Nov 28, 2008
    1,542
    102
    But yet I can find no good reason of why all the manufacturers are doing so instead of marking the negative terminal like other polarised capacitors.

    Selling more could be a good reason.:D
     
  6. steveb

    Senior Member

    Jul 3, 2008
    2,433
    469
    This has always been a mystery to me too. It reminds me of all those crazy UK people driving on the wrong side of the road. ;)

    Just kidding guys. I couldn't resist. Bill will you defend me when the lynch mob comes to get me? :eek:
     
  7. xnihilo

    Thread Starter Active Member

    Nov 20, 2008
    33
    0
    Thanks. So it IS polarized. I need to check my board :p
     
  8. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,040
    287
    I can tell you this about metal can tantalums. If you apply the polarity one direction, it's a capacitor. If you apply the polarity the other direction it's a blasting cap! (I've been "shot" by blasting caps...er...tantalum capacitors on numerous occasions. :D

    Eric
     
  9. leftyretro

    Active Member

    Nov 25, 2008
    394
    2
    And the two terminals of a polarized capacitor are not named anode and cathode, just the positive and negative terminals.

    Lefty
     
  10. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    Hello,

    Here is a PDF with notes on the usage of tantalum capacitors.

    Greetings,
    Bertus
     
  11. dlhylton

    New Member

    Jan 24, 2012
    5
    0
  12. MrChips

    Moderator

    Oct 2, 2009
    12,452
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    Better late than never.
     
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