# How susceptive is an inductor to frequency and current?

According to Coilcraft - Testing Inductors at Application Frequencies the inductance of a coil changes with frequency and current. Most datasheets don't give a frequency-inductance plot and current-inductance plot. Is there some rule/guideline to estimate the inductance at circuit frequency and circuit current given the test frequency and the max/saturation current?

• @Chris - do you have a linkable source for that knowledge. Also, you say $\epsilon_R$ - are you in fact mistaking Electric permittivity for magnetic permeability? Aha, just been on en.wikipedia.org/wiki/Relative_permittivity and yes, dear chap you are!!! – Andy aka Aug 1 '13 at 21:07