Power-One, Inc. (NASDAQ:PWER) today announced that Richard J. Thompson has been appointed to its Board of Directors. Mr. Thompson will also serve on the Board's audit committee.

Most recently, Mr. Thompson was Chief Financial Officer of American Power Conversion (APC), a $2 billion provider of real-time computing and data center infrastructure products and services (APC was acquired by Schneider Electric SA in February, 2007). Prior to joining APC, Mr. Thompson was CFO of Artesyn Technologies where he initiated and managed the company's sales and operations planning process and successfully guided the company through key acquisitions and expanding its market.

Earlier in his career Mr. Thompson held finance positions at Control Data Corporation (CDC), a $4 billion computer/peripheral and financial services company and gained international business experience with global energy and electronics leader, Schlumberger Limited.

"We are very pleased to welcome Richard Thompson to our Board of Directors," said Bill Yeates, Power-One's Chief Executive Officer. "He brings a wealth of experience to Power-One and his extensive financial and operations background in the power, energy, and semiconductor industries will further strengthen the overall depth of our Board as we position the company for sustained profitability.?

About Power-One:

Power-One is a leading designer and manufacturer of power conversion products sold primarily to OEM customers in the telecommunications and server/storage markets; as well as data communications equipment manufacturers. Power-One's high-reliability products are also used in applications such as test equipment, high-end industrial applications, and alternative energy. Power-One, with headquarters in Camarillo, CA, has approximately 4,000 employees with manufacturing and/or R&D operations in the United States, Dominican Republic, Italy, Hungary, Switzerland, Slovakia, Ireland and China. For information on Power-One and its products, visit the company's Web site at www.power-one.com.

Power-One, Inc.
Dave Hage, Executive Vice President
805-987-8741
or
Avalon Investor Relations
Kristyn Hutzell, 512-514-6046