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Capacitor Identification

Discussion in 'Electronic Basics' started by Wayne, Apr 5, 2005.

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  1. Wayne

    Wayne Guest

    NO..NO... Bi-Polar means TWO poles. Plus and a Negative.

    You want NON-POLAR.


  2. Wayne

    Wayne Guest

    Never-mind. I'm having a hard time dealing with my dead brain cells....
    bi-polar is non-polar.

  3. Chretien

    Chretien Guest

    I needed a 47uF cap. Not Polarized.

    I went and bought what I thought I needed . The package says,
    CAP BP RDL 47uf 25v 5LS ELNA

    I'm assuming that BP (Bi Polar) means that it can go in both directions. It
    doesn't have any of the [------] negative markings on it. I guess the thing
    that I'm a little mystified about is that the leads are different length. eg
    one is short and one is long, just like Electrolytic CAPS.

    Most of the Non Polarized Caps I have seen (Ok I'm new to this so a 100
    maybe) have legs that are equal in length. Am I parinoid? This is really a
    Non Polarized Cap right ??

  4. Perhaps it's a bipolar disorder? ;)

    Robert Monsen

    "Your Highness, I have no need of this hypothesis."
    - Pierre Laplace (1749-1827), to Napoleon,
    on why his works on celestial mechanics make no mention of God.
  5. Lord Garth

    Lord Garth Guest

    Zoloft for caps!
  6. Rich Grise

    Rich Grise Guest

    One way to be absolutely sure would be to take a 24V power supply, and
    charge it in either direction. Use a 1k ohm or so resistor, so you
    don't make sparks or anything. If it doesn't blow up either direction,
    it's probably nonpolar.

    The only reason I could think of for two different lead lengths is
    that the long one connects to the outer foil, which shouldn't really
    make any difference in a nonpolar.

    Elna makes caps, but they don't have a whole listing on their website -
    they want you to order a catalog. Or you could call or email them.

    Good Luck!
  7. Chretien

    Chretien Guest

    Thanks all.
  8. Lord Garth

    Lord Garth Guest

    That should be series!!!! Your text sounds like inverse parallel.
  9. John Fields

    John Fields Guest

  10. Jamie

    Jamie Guest

    that's strange, maybe i missed the boat.
    Bi-Polar (Bidirectional)= ( both ways)?
    i think the markings in the Cap meant
    bi-directional polarity.
    maybe your thinking about a Bipolar transistor?
    i don't know, maybe the young recruits coming out of
    school now using different acronyms
  11. Jamie

    Jamie Guest

    i don't know if your aware of this, but you can take 2 polarized caps of
    double value and back to back them and get the same thing.
  12. phaeton

    phaeton Guest

    Zoloft for Caps!!
    Perhaps in a Parallel Universe we have manically depressed people
    popping Soft Caps and building microcontrollers out of Zoloft tabs.
  13. Lord Garth

    Lord Garth Guest

    Have you been smoking Si?
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