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TCAL Through Hole Fixed Inductors

How to Select a fixed inductor

Perfectly, inductors should have zero resistance and capacitance. This is not practically possible, as the

conducting copper wires, used for fixed inductors, have small internal resistance.

Important criteria for the selection are:

● Inductance Range (H):

The rated inductance range of the inductor. This is designated by ±10% of the inductance.

● Quality Factor (Q):

The Q value of an inductor is a measure of the relative losses in an inductor. The Q is also known

as the “quality factor” and is technically defined as the ratio of inductive reactance to effective

resistance.

● Self-Resonant Frequency (SRF):

The frequency at which the inductor’s distributed capacitance resonates with the inductance. It is

at this frequency that the inductance is equal to the capacitance and they cancel each other. The

inductor will act purely resistive with a high impedance at the SRF point.

● Permissible DC Current:

Measured in Ohms, it is the maximum DC current that the inductor should be exposed to.

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TCUT20183P Datasheet(PDF) 27 Page - Token Electronics Industry Co., Ltd.