| Electronics > Beginners |
| What Voltage is used to calculated capacitor charge? |
| (1/1) |
| implor:
Is there a standard that say what voltage to use when determine a capacitors capacitance? Example: you have a 1uF rated at 50V capacitors. is that 1uF at 50V? C = Q/V |
| Kleinstein:
In most cases capacitors are quite linear and it does not really matter which voltage to use. The normal way is to use a small voltage (like 1V) - so the same instrument can test all most capacitors. Especially with some MLCCs (class 2) however this can matter and the capacitance values given are for low voltage with no bias. |
| implor:
Sound logical ;). the confusion is because i'm thinking of Capacitance as Energy but it's not. I was thinking about how using a high voltage rated capacitor would impact the amount of stored energy. Example 50V MLCC vs 25V MLCC (ignoring derating) But when I'm now doing some math I see it's only dependent on the accentual applied voltage and not the maximum rating. W = (C*V^2)/2 Thanks for the reply :-+ |
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