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  1. #1
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    ceramic bypass capacitor

    I have a simply question. For DC power supply, can the general 0402/0603 ceramic capacitor be used for bypass capacitor?

    Thanks.

    •   Alt16th July 2009, 18:35

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    bypass cap ceramic

    i think so, but lets know more answers form the other members of this forum

    thanks


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    •   Alt16th July 2009, 20:37

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    ceramic bypass caps

    Yes but you should respect the voltage ratings



    •   Alt16th July 2009, 22:50

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    affect price capacitor

    In general, yes. I know some guys that use a standard 0.1 uF all the way to 35 GHz. However, it is a specific type from the same vendor that they know is good. Some capacitors will resonate at microwave frequencies, and you want to know that. So test a couple sammples of a cap you like, and if they work, keep using that SAME one for future designs.


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    bypass capacitor at 35 mhz

    good answer!

    Just another simple question, I found that even the same size, same capacitance, same series capacitor, the voltage rating does not affect the unit price?

    Does it mean that I should use the highest voltage rating? What is the trade-off of it?



    •   Alt17th July 2009, 06:40

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    ceramic capacitor rating

    Does it mean that I should use the highest voltage rating? What is the trade-off of it?
    None, except size or (possibly) price. In addition, you should consider that effective capacitance of high Er dielectrica decreases with applied voltage, so it's a good idea to use bypass caps below 0.5 of rated voltage, if possible.


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