Accurate Capacitor Sizing: Practical Capacitance Equation
Capacitance Formula
The capacitance of a parallel‑plate capacitor is calculated with the well‑known relationship:
Permittivity of Dielectric
Dielectric permittivity (εr) is a material property that determines how much charge a capacitor can store at a given voltage. It scales the capacitance linearly and is crucial for accurate sizing.
Using the practical dimensions of the plates, the following expression gives capacitance directly in picofarads (pF):
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