the internal resistance of the inductor

“DCR. ( m Ω)”

DCR usually refers to the internal resistance of the inductor, and m Ω is the unit of internal resistance. The larger the inductance of the same series of inductors, the larger the internal resistance. The DCR value can be tested with a multimeter. The internal resistance is also from a few m Ω to several tens of mΩ, and the internal resistance of several hundred Ω is rare.
DCR is the abbreviation of DC RESISTANCE: DC resistance: the resistance of the inductor coil under non-AC power. In the inductor design, the smaller the DC resistance, the better. The measurement unit is ohm, usually marked with its maximum value.
DCR, DC Resistor, the inductor can pass DC, but there is still DC resistance. This DC resistance is mainly the long enameled wire resistance in the inductor. The rated current is also varied according to the resistance of the enameled wire.

The longer the enameled wire, the higher the sense value, the greater the resistance, and the lower the rated current.
The thicker the enameled wire, the larger the volume, the smaller the resistance, and the higher the rated current.

Do not look at the milliohm level of resistance is very small, for example, at 150mR, 1.2A current, there is also 0.2W power, concentrated on the area of 4x4mm, the heat is not too small.

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