We're moving from surface mount tantalum capacitors to surface mount ceramic capacitors. How do I properly size a ceramic capacitor in terms of rated voltage? With bulk tantalums we always spec a cap with a voltage that is twice or three times the nominal voltage of the circuit. Is there a similar rule for ceramics?
2007-08-08 09:24:18 · 2 answers · asked by Rick B 2 in Science & Mathematics ➔ Engineering
The same de-rating applies to ceramics.
We de-rate the maximum applied voltage to 50% of the rated voltage for ceramics, where I work (same as your '2x').
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2007-08-08 09:33:59 · answer #1 · answered by tlbs101 7 · 1⤊ 0⤋
2x should be more than enough.
Tantalums are generally given more headroom since they are sensitive to voltage fluctuations and will, under certain fault conditions, explode in a very violent manner.
2007-08-08 09:45:39 · answer #2 · answered by Anonymous · 1⤊ 0⤋