Detection of inductors 2

(3) Distributed capacitance. The capacitance between turns of the coil, between the coil and the shielding cover (when there is a shielding cover), between the coil and the magnetic core, and between the base plate are all called distributed capacitance. diode

The existence of distributed capacitance reduces the Q value of the coil and deteriorates its stability, so the smaller the distributed capacitance of the coil, the better.

4. Identification of inductor parameters (1) For larger volume inductor coils, their inductance and nominal current are marked on the casing.

(2) A small fixed high-frequency inductor coil, also known as a color coded inductor, has a color ring marked on its outer shell or a number directly indicating the inductance value. The color code marking rules are the same as those for resistors and capacitors. But the unit of inductance of an inductor coil is usually mH. diode

(3) The identification example of SL (horizontal) type inductor coil is shown in Figure 2-19; The identification example of EL (vertical) type inductor coil is shown in Figure 2-20.

(4) Labeling of chip inductors (also known as surface mount inductors). diode