Signal · Calculator
Ferrite Bead Calculator
Model the frequency-dependent impedance of a ferrite bead for EMI suppression and filtering applications.
Adjust inputs and the results update automatically.
Bead Specifications
Generic single-peak model — illustrative of typical bead behavior.
Model
|Z(f)| ≈ Zₚₑₐₖ / √( 1 + (1.2 × (f/fₚ − fₚ/f))² )
Generic engineering approximation. Real bead impedance is the vector sum of frequency-dependent R(f) and X(f) — consult bead-specific S-parameters for production designs.
Predicted Impedance
Impedance @ 100 MHz
600.0Ω
Peak Impedance
600Ω
Peak Frequency
100MHz
Frequency Response
Impedance vs. frequency, log scale.
Example Component Suggestions
Illustrative only — no real part numbers or manufacturers referenced.
Best Match
Example Component A
General-purpose, mid-range tolerance
Alternate
Example Component B
Precision class, low drift
Stretch
Example Component C
High-power, extended range