| 摘要 |
A common mode choke coil is realized in which countermeasures against leakage flux are taken so as to reduce adverse effects on an external apparatus. Coils 291, 292 are wound around a toroidal magnetic core 22 and sandwich a partition plate 27 provided within an inner circumference of the magnetic core so as to cancel out respective magnetic fluxes produced by the coils relative to a normal mode current. A belt-like magnetic shield plate 24 is provided in a direction along leakage fluxes from the coils and attached closely to a substantially U-shaped insulating protection plate 23 having side walls 25, 25 and the insulating protection plate 23 is then detachably attached to a base 21 with catches 26 provided at both ends of the plate 23.
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