Every step we take brings us to a better way.


Founded in 1990, Yuan Dean had set up the headquarter in Tainan.
As the business grew bigger, five years later we established our branch – Ho Mao electronics in Xiamen.
In July 2016, our new building, including office and production line, at Tainan Technology Industrial Park started operation. Our Xiamen factory had a relocation as well to increase our capacity for fulfilling worldwide customers' great production demand and satisfaction.
In 2019, we get IATF16949 certification. And this year, we are certified by ISO 14001:2015.
2020 is a big year for YDS, our 30th anniversary, we will maintain our quality standards and keep growing.

2021Yuan Dean established SMT assembly line.
2020Yuan Dean awarded ISO 14001:2015 environmental management.
2019Yuan Dean awarded IATF16949 quality management.
2016Yuan Dean Scientific., Co, LTD. new facility founded in Tainan Technology Industrial Park.
2015Successfully implementing Tip-Top ERP (Enterprise Resource Planning) system in 2015.
2010YDS products were CE Certificated.
2009Use the Energy Dispersive X-ray Fluorescence(ED-XRF) to ensure the reliability of RoHS Certification. ISO 9001:2000 Upgrade to ISO 9001:2008 Certification.
2008Ho Mao (Xiamen) awarded IECQ 080000 Hazardous Substance Process Management.
2005Ho Mao (Xiamen) awarded ISO 14001:2004 environmental management.
2001RJ45 series was introduced to YDS’ production.
Ho Mao (Xiamen) awarded ISO 9001:2000 quality management.
1998Yuan Dean awarded ISO 9002 quality management.
1995Ho Mao Electronics (Xiamen) Co., LTD. was established in China.
1994DC/DC Converters and Filter were introduced to YDS’ production.
1990Yuan Dean Scientific., Co, LTD. was founded in Tainan Taiwan.

Power Converter | Transformer | Magnetic Component | YDS

Located in Taiwan, YUAN DEAN SCIENTIFIC CO., LTD., since 1990, is a power converter, transformer, magnetic component manufacturer in electronic component industry. Main product, including DC/DC converter, AC/DC converter, RJ45 with magnetics, 10/100/1G/2.5G/10G Base-T Lan filter, Delay Lines, all kinds of Transformer, Inductor, LED Driver/Lighting products and Power bank.

ISO 9001 & ISO 14001, IATF16949 certified power converter, high frequency transformer, magnetic component with reliable EMC and EMI / EMS / EDS lab tests. Power converter solutions for medical, railway, POE, etc.

YDS has been offering customers high-quality power converter, transformer, magnetic component, both with advanced technology and 25 years of experience, YDS ensures each customer's demands are met.