Item 5.02: Departure of Directors or Principal Officers;
Election of Directors; Appointment of Principal Officers; Compensatory Arrangements of Certain Officers

(d) Election of New Director

On July 23, 2012, the Board of Directors of Power-One, Inc. ("Power-One" or the "Company") increased its size from eight to nine and appointed Hartmut Liebel to serve as a director of the Company and as a member of the Audit Committee. Mr. Liebel has not been a party to any transaction or currently proposed transaction with the Company (or any of its subsidiaries) that is reportable under Item 404(a) of Regulation S-K.

Item 9.01: Financial Statements and Exhibits.

(d) Exhibits Exhibit Number Description Exhibit 99.1 Press Release issued by Power-One, Inc. on July 24, 2012 announcing the appointment of Hartmut Liebel to the Board of Directors.

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