| 摘要 |
A transformer 100 includes: a bobbin 102 around which a first winding 104 and a secondary winding 106 are wound; cores 108 attached to the bobbin 102; and a cover 114 attached to the main body 110. The cover 114 surrounds a lower surface and an upper surface in addition to side surfaces to exhibit an insulating property on a circuit board. The cover 114 is laterally attached to the main body 110 from a secondary-side direction of the main body 110, where primary and secondary sides are directions defined when the main body 110 is mounted on the circuit board.
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