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    #1

    what are these things?

    i have a Bunch of these things which i originally thought were caps of some kind. but i recently blew up a thermistor and it looks just like these things. where i get confused is the units of measure printed on the side of these things, they all seem different i have K,n,V,J,u and some have strips like a resistor. I'm not sure what they all are or where to start cataloging these things or if i just throw them all away.

    K I'm guessing is Resistance?
    V volts?
    u micro farads?

    the J and the n have me most confused and J is on most all of them. any help would go a long way. i need a 2K ohm thermistor (QAD0012-202) and I'm wondering how to go about finding one in this pile.
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    #2
    Re: what are these things?

    Those good sir are ceramic caps.

    http://en.wikipedia.org/wiki/Ceramic_capacitor

    The labeling defines capacitance, volts and series and sometimes have a manufacturing logo stamp somewhere.

    Comment

      #3
      Re: what are these things?

      all of them are? even the ones with stripes on them? can i measure them with a fared meter and just look for 25v,100v, etc... and use them like i would when replaceing a regular cap?

      are you sure they aren't thermistors?

      Comment

        #4
        Re: what are these things?

        Those bean sizes ones with a L on them could be tantalum capacitors.

        Comment

          #5
          Re: what are these things?

          Originally posted by mariushm View Post
          Those bean sizes ones with a L on them could be tantalum capacitors.
          They sure are.

          Unlike cermic/mylar caps they ARE polarized... like 'lytics, the stripe marks the negative lead.
          sigpic

          (Insert witty quote here)

          Comment

            #6
            Re: what are these things?

            some of them may be SCK's or thermistors hard to tell from the picture...
            Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.

            Comment

              #7
              Re: what are these things?

              The red rectangular ones are polyester film capacitors.

              Comment

                #8
                Re: what are these things?



                Remember, the red L on the tantalum caps indicates polarity. Tantalums are right opposite of aluminum electrolytics... the L indicates "+". NEVER subject a tantalum capacitor to reverse voltage or overvoltage, they WILL explode violently!
                Attached Files

                Comment

                  #9
                  Re: what are these things?

                  I see a mix with mostly disc ceramic caps, some film caps (probably polyester), some solid tantalum caps (the tear drop shaped parts) and a very few probable monolythic ceramic caps. That white or light mint green part in the center front of the pic may be an R-C snubber. That large brown part at the left marked "105K" is a 1uF, +/-10 film cap.
                  PeteS in CA

                  Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
                  ****************************
                  To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
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                  Comment

                    #10
                    Re: what are these things?

                    can i test them with a esr meter? or a farred meter? to check if they are good?

                    Comment

                      #11
                      Re: what are these things?

                      Usually the preferred method is to use a DMM with capacitance capability to do the ceramic and foil caps, and use an ESR meter on the tantalums along with a DMM (provided the total capacitance is not over range... I think my DMM tops out at around 20uf).

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