Invention Grant
- Patent Title: Common-mode choke coil
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Application No.: US17394326Application Date: 2021-08-04
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Publication No.: US12272488B2Publication Date: 2025-04-08
- Inventor: Kouhei Matsuura , Atsuo Hirukawa , Hiroshi Ueki
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Kyoto-fu
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Kyoto-fu
- Agency: Studebaker Brackett PLLC
- Priority: JP2020-132930 20200805
- Main IPC: H01F27/29
- IPC: H01F27/29 ; H01F17/00

Abstract:
A common-mode choke coil includes a multilayer body, a first coil, a second coil, a first terminal electrode, a second terminal electrode, a third terminal electrode, and a fourth terminal electrode. The multilayer body includes plural non-conductor layers. The first and second coils are incorporated in the multilayer body. The first and second terminal electrodes are connected to the first coil. The third and fourth terminal electrodes are connected to the second coil. The first coil has a path length L1, the second coil has a path length L2, and the sum of the path length L1 and the path length L2 is less than or equal to 3.5 mm. The non-conductor layers each have a relative permittivity of less than or equal to 11.
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