SDG Electronics

Reactance and real impedance

Capacitor ESR/ESL or inductor winding resistance, including a frequency sweep.

Development preview. Check the assumptions below before relying on a result. Calculations run in your browser.

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How it calculates

Model: ZC = ESR + j(ωESL − 1/ωC); ZL = Rw + jωL

Assumptions

  • Frequency-independent lumped ESR, ESL and winding resistance; an inductor’s parallel self-capacitance is not modelled.

Worked example

These are the calculator's default inputs. Change any input above to recalculate.

Inputs

Component
capacitor
Capacitance
0.000001 F
Inductance
0.001 H
ESR or winding resistance
0.1 Ω
Capacitor series inductance
1e-9 H
Evaluation frequency
1000 Hz
Sweep start
10 Hz
Sweep end
100000000 Hz

Results

Impedance magnitude
159.155 Ω
Phase
-89.964 degree
Signed reactance
-159.155 Ω
Capacitor self-resonance
5032920 Hz

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