| 摘要 |
A common-mode choke coil which is capable of achieving a desired impedance value and reducing the amount of deviation in the impedance values, includes a core having flanges disposed at both ends and a winding section arranged between the flanges. Electrodes are disposed in the flanges, while two pieces of wire are wound around the winding section and ends of the pieces of wire are connected to the electrodes. A ferrite plate with a relative magnetic permeability that is smaller than that of the core is attached on the upper surface of the flanges with an adhesive so as to cover the wire. Thereby, the impedance value of the coil preferably has a relative magnetic permeability that is different from that of a coil having the same relative magnetic permeability of the ferrite plate as that of the core, thereby increasing the degree of freedom of the impedance value while changes in the impedance value are reliably prevented even when the ferrite plate is displaced.
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