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  6. Musashino Doko Co., Ltd. - Transformers, Reactors * Supporting from design to mass production.

Musashino Doko Co., Ltd. - Transformers, Reactors * Supporting from design to mass production.

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last updated:Sep 26, 2025

セイワ 東京本社、関西支社、名古屋営業所、中国無錫  グループ会社 エレクトロン(長野県松本市)
セイワ 東京本社、関西支社、名古屋営業所、中国無錫  グループ会社 エレクトロン(長野県松本市)
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From design to mass production of transformers and reactors tailored to your needs, we provide one-stop service! Small communication transformers / large three-phase transformers / power units.

Musashino Tsukou Co., Ltd. is a company engaged in the design and manufacturing of transformers and reactors. We have been involved in the manufacturing of these transformers and reactors for over 60 years, striving for the development of our unique products and the improvement of technology. The products created through our daily efforts are utilized in various fields, including medical devices. Based on the technology cultivated over our 60-year history, we handle everything from small communication transformers to large three-phase transformers and the assembly of power units. Our Tianjin factory in China, which has been in operation for 25 years, adheres to the founding principle of "small-batch production of a wide variety" and maintains stable quality. We offer custom-made solutions tailored to the usage conditions and product specifications, including small and specially shaped transformers that match the product structure, as well as reactors designed to suppress heat generation. We support the introduction from the specification consideration and design stage. We respond to a wide variety of requests, including the application of overseas safety standards and the reproduction of existing products from other companies. Please feel free to contact us when you need our services.

    transformer
武蔵野通工.jpg

Musashino Doko Co., Ltd. - Transformers, Reactors * Supporting from design to mass production.

武蔵野通工.jpg
武蔵野通工.jpg 武蔵野製品1.jpg 武蔵野製品2.jpg 武蔵野製品3.jpg
  • Musashino Doko Co., Ltd. - Homepage
  • Special site - Product/service details - https://pr.mono.ipros.com/seiwa-tr/product/

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We will respond to our customers' requests with the know-how we have cultivated through our experience in various industries, such as medical devices and disaster prevention equipment. We are flexible in accommodating inquiries for small lots and prototypes. We also accept requests for the reproduction of discontinued products from other companies. Even if there are no detailed manufacturing drawings, we can reproduce and mass-produce based on actual items or general specifications through reverse engineering. In addition to simple reproduction, we also offer suggestions for improvements to existing specifications and designs.

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Applications/Examples of results

Transformers NCW transformer (horizontal type, vertical type) OI transformer Cut core transformer (horizontal transformer) Board-mounted transformer Equipment installation transformer Control transformer for distribution board Single-phase transformer, three-phase transformer Reactors AC reactor DC reactor (EI core type) DC reactor (cut core type) Switching transformer Switching transformer Power inductor

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Musashino Industrial Products Guide

Musashino Industrial Products Guide

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セイワ

セイワ 東京本社、関西支社、名古屋営業所、中国無錫  グループ会社 エレクトロン(長野県松本市)

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The development of electronics has given people great dreams and has turned those dreams into reality, one by one. This development has been passed on to the 21st century, inspiring even greater dreams and hopes. I am deeply grateful and delighted to have been able to engage in work that contributes to this segment of the electronics industry. Moving forward, I will continue to serve as a conduit for the appropriate information on semiconductors and electronic components, so that I can help realize humanity's great dreams and support the product and information development of our clients. I am committed to walking alongside our clients and growing together in the information society of the 21st century. However, on the other hand, global environmental issues have become increasingly prominent. As a member of society, I feel the importance of leaving a rich natural environment for the future and preserving the fundamental value of humanity. I am determined to strive towards becoming a company that harmonizes with nature and society as we move towards an endless future.

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