SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 March 19, 2002 Date of report (Date of earliest event reported) ON Semiconductor Corporation (Exact name of registrant as specified in its charter) Delaware 000-30419 36-3840979 - -------------------------------------------------------------------------------- (State or other jurisdiction (Commission (I.R.S. Employer of incorporation) File Number) Identification Number) ON Semiconductor Corporation 5005 E. McDowell Road Phoenix, Arizona 85008 - -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) 602-244-6600 (Registrant's telephone number, including area code) 1

ITEM 5. OTHER EVENTS. Attached to this Current Report as Exhibit 99 is a copy of a press release for ON Semiconductor Corporation dated March 19, 2002 titled "ON Semiconductor Appoints Chief Financial Officer." ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS. (a) Financial Statements of Businesses Acquired Not applicable. (b) Pro Forma Financial Information Not applicable. (c) Exhibits Exhibit Number Description - -------------- ----------- 99 Press release for ON Semiconductor Corporation dated March 19, 2002 titled "ON Semiconductor Appoints Chief Financial Officer." 2

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. ON SEMICONDUCTOR CORPORATION ---------------------------- (Registrant) Date: March 20, 2002 By: /S/ G. SONNY CAVE ------------------------------- G. Sonny Cave Vice President, Secretary and General Counsel 3

EXHIBIT INDEX Exhibit Number Description - -------------- ----------- 99 Press release for ON Semiconductor Corporation dated March 19, 2002 titled "ON Semiconductor Appoints Chief Financial Officer." 4

EXHIBIT 99 [ON logo appears here] Everett Tackett, APR Rudy Garcia Director Public Relations Director Investor Relations ON Semiconductor ON Semiconductor (602) 244-4534 (602) 244-3437 everett.tackett@onsemi.com rudy.garcia@onsemi.com ON SEMICONDUCTOR APPOINTS CHIEF FINANCIAL OFFICER John T. Kurtzweil to lead company's global finance organization PHOENIX, ARIZ. - MARCH 19, 2002 - ON Semiconductor (Nasdaq: ONNN) today announced that it has appointed John T. Kurtzweil as senior vice president, Chief Financial Officer (CFO) and Treasurer to lead the company's finance organization as the company continues to execute on its strategy. Kurtzweil is a 23-year veteran of the high-tech industry and has held numerous management positions of increasing responsibility in finance and accounting during his career. Kurtzweil was most recently the senior vice president of finance and CFO at Read-Rite Corporation, one of the world's largest independent suppliers of magnetic recording heads for the hard disk drive (HDD) market. Prior to his experience at Read-Rite, he held senior finance positions at Maxtor Corporation, Miniscribe Corporation and Honeywell Incorporated. "John brings a wealth of experience in managing finance and accounting operations for growing, global technology enterprises," said Steve Hanson, ON Semiconductor president and CEO. "As the company continues to execute on its long-range strategy, John's experience and proven leadership will play a key role." ON Semiconductor's appointment of Kurtzweil is effective April 1. Kurtzweil replaces Dario Sacomani, who was the company's CFO since it spun out of Motorola in August 1999. Sacomani will assist in the leadership transition and will announce his future plans at a later date. "We're tremendously grateful for Dario's contribution to ON Semiconductor," Hanson said. "Dario was instrumental in the successful start up of the company and providing financial guidance during a time of great change and development for the company." Kurtzweil earned his MBA at the University of St. Thomas and his bachelor's degree in accounting from Arizona State University. He is a Certified Public Accountant. ABOUT ON SEMICONDUCTOR ON Semiconductor (Nasdaq: ONNN) offers an extensive portfolio of power- and data-management semiconductors that address the design needs of today's sophisticated 5

electronic products, appliances and automobiles. For more information visit ON Semiconductor's Web site at http://www.onsemi.com. # # # ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. 6