Company Evolution

SDE was established by Mr. Andy Hsiau in Taiwan in 1982. From very beginning, the company has been dedicating in transformer design and manufacturing. Quality is always at the core of our culture and we commit to this legendary to meet and exceed customer's needs.

Over past decades, SDE continues to grow significantly and has shifted its production to China. The company quickly gains a strong customer base in North America and expands on its presence in the highly specialized custom transformer. We offer expertise in marketing, design and manufacturing of power and audio transformer, toroid transformer, ferrite transformer, ignition coils, and many other coil windings. The company now employs over 400 employees both in China and Taiwan.

Some of our achievements and milestones include

Year Event Note
1982 SDE established in Taiwan  
1986 Established strong contacts with several prestigious US companies  
1990 Seeking offshore factory locations in Southern China, Malaysia and Thailand began  
1991 Established manufacturing operations in DongGuan, China  
1993 Manufacturing moved to China whilst sales, procurement and finance remained in Taiwan.  
2000 ISO 9002:1994 certified Attachment
2001 - 2005 UL safety awarded E202689, E229807, E227272, E257517
2003 ISO 9001:2000 certified Attachment
2010 Set up Power Products (Drum core and Slic products)  
2010 Set up SDE backsheet Division of ISOVOLTA  

SDE is recognized as a high quality transformer manufacturer. Our people speak to customer, build to customer prints, and help make decisive resolutions. The company has strong research and development capabilities, as well as high level of versatilities in production, service, quality and operation. One of our strength is conservative financial management, which help us weather unexpected financial storms.

We are specialized in standard and custom transformers such as standard power & audio transformers. We offer rapid delivery and good service to satisfy customers' requirement at anytime.

All parts produced by SDE are made in accordance with the customers' specification. Each unit receives 100% in-process and final test to ensure it meets customer requirements. We can provide best competitive prices for all cases. If you are interested in working with well-grounded professionals, please contact and inform us.

President Andy Shiau.
Company address
TWN/53-5 Zhen Shan ,Po Cheng Rd,
Yuan Shan Hsiang, I-Lan hsien, Taiwan, R.O.C. TEL: 886-3-9233966
FAX: 886-3-9233800

Plant address
No 3rd Industrial Area, Jizhou Shijie Town,
Dong Guan City, Guang Dong, China. TEL: 86-769-86634811
FAX: 86-769-86632050