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

May 1, 2003
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 of incorporation)	(Commission File Number)	(I.R.S. Employer 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)

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TABLE OF CONTENTS

	Item 7. Financial Statements, Pro Forma Financial Information and Exhibits.
	Item 9. Regulation FD Disclosure (the following discussion is furnished under“Item 12. Results of Operations and Financial Condition”)
SIGNATURES
EXHIBIT INDEX
Exhibit 99

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 May 1, 2003 titled “ON Semiconductor Reports First Quarter 2003 Results.”

Item 9. Regulation FD Disclosure (the following discussion is furnished under
“Item 12. Results of Operations and Financial Condition”)

In accordance with SEC Release No. 33-8216, the following information, required to be furnished under “Item 12. Results of Operations and Financial Condition,” is furnished under “Item 9. Regulation FD Disclosure.”

On May 1, 2003, the Company announced via a press release its consolidated financial results for the quarter ended April 4, 2003. A copy of the Company’s press release is attached hereto as Exhibit 99. This Form 8-K and the attached exhibit are provided under Item 12 of the Form 8-K and are furnished to, but not filed with, the Securities and Exchange Commission.

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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: May 1, 2003
	By:	/s/ DONALD A. COLVIN
		Donald A. Colvin Senior Vice President, Chief Financial Officer and Treasurer

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EXHIBIT INDEX

Exhibit Number	Description
99	Press release for ON Semiconductor Corporation dated May 1, 2003 titled “ON Semiconductor Reports First Quarter 2003 Results.”

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