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Thread: Max Voltage of Ceramic Capacitor

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    Peter_wadley Good Peter_wadley Good
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    Default Max Voltage of Ceramic Capacitor

    I cant seem to find out what the max Voltage you can apply to this capacitor is:
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    crust Okay
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    There is a glare on the part, but I believe I see an E, that means 25V assuming this part follows the general marking standard

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    E5M it reads.
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    Peter_wadley Good Peter_wadley Good
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    Quote Originally Posted by crust
    There is a glare on the part, but I believe I see an E, that means 25V assuming this part follows the general marking standard
    OK thanks!

    Do you by chance have a link to the marking standards?
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    crust Okay
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    They are in a book I have, but a quick search yielded this. I didn't check it so I can't attest to its correctness.

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    Peter_wadley Good Peter_wadley Good
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    Yes thats the same one I found... its perfect

    I was always under the impression ceramic caps could withstand a number of KV, thank good i asked!!
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    Most ceramic capacitors can only stand from 25V to 100V but some are only rated to 16V.

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    In the olden days, the ceramic caps that were used in tube circuits had to withstand several hundred volts. And some high power transmitter circuits run on well over a thousand volts. Thus the typical ceramic cap was designed to withstand high voltages. Now there's not much need for such high voltages so the caps are correspondingly lower voltage since a lower voltage cap can use a thinner insulator between conducting layers, making the cap physically smaller.

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    Quote Originally Posted by Peter_wadley
    Yes thats the same one I found... its perfect

    I was always under the impression ceramic caps could withstand a number of KV, thank good i asked!!
    It's usually the blue circular ones that are high voltage, they commonly go faulty in TV's - easy to spot though, they either have an obvious burnt spot on them, or a burnt split.
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