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A4002_EEV • 2/21/2014

Surface Mount Aluminum Electrolytic Capacitors – EEV Series, +105ºC

Frequency Dependence of the Capacitance

Effectivecapacitancevalueisderivedfromtheimpedancecurve,aslongasimpedanceisstillintherangewherethecapacitance

component is dominant.

C =

1

C = Capacitance (F)

2πfZ

f = Frequency (Hz)

Z=Impedance(Ω)

Dissipation Factor tan δ (DF)

DissipationFactortanδistheratiobetweentheactiveandreactivepowerforasinusoidalwaveformvoltage.Itcanbethoughtofasa

measurementofthegapbetweenanactualandidealcapacitor.

reactive

active

ideal

actual

δ

Tanδismeasuredwiththesameset-upusedfortheseriescapacitanceESC.

tanδ=ωxESCxESRwhere:

ESC = Equivalent Series Capacitance

ESR = Equivalent Series Resistance

Equivalent Series Inductance (ESL)

SelfinductanceorEquivalentSeriesInductanceresultsfromtheterminalconfigurationandinternaldesignofthecapacitor.

Equivalent

Series

Capacitance

(ESC)

Equivalent

Series

Resistance

(ESR)

Equivalent

Series

Inductance

(ESL)

Capacitor Equivalent Internal Circuit