MLCC Impedance Calculator

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MLCC Impedance Calculator

Calculate the capacitive reactance (impedance) of a multilayer ceramic capacitor (MLCC) at a specified frequency. Useful for RF, filter, and decoupling applications.

Input Parameters

Capacitance

Frequency

Results

Capacitive Reactance

Phase Angle

Formula

Capacitive Reactance: Xc = 1 / (2 × π × f × C)

Phase Angle: θ = -90° (ideal capacitor)

Frequently Asked Questions (FAQ)

Q1: What is capacitive reactance?
It is the opposition to AC current by a capacitor.

Q2: How does frequency affect impedance?
Higher frequency reduces capacitive reactance.

Q3: Does MLCC type affect Xc?
For ideal calculation, no; real MLCCs may have ESL/ESR affecting impedance at high frequency.

Q4: Can I use this for filter design?
Yes, use the calculated Xc to size MLCCs for decoupling or RF filtering.

Q5: Does temperature affect impedance?
Dielectric temperature coefficient may slightly change capacitance, affecting Xc.

Q6: Can I use this for multiple MLCCs in parallel?
Yes, total capacitance is the sum, then calculate combined Xc.

Disclaimer: This calculator is for engineering reference only. Real MLCC impedance may differ due to ESR, ESL, temperature, frequency, and DC bias effects.

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