<SEC-DOCUMENT>0001225208-21-014734.txt : 20211209
<SEC-HEADER>0001225208-21-014734.hdr.sgml : 20211209
<ACCEPTANCE-DATETIME>20211209171039
ACCESSION NUMBER:		0001225208-21-014734
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20211207
FILED AS OF DATE:		20211209
DATE AS OF CHANGE:		20211209

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			El-Khoury Hassane
		CENTRAL INDEX KEY:			0001558882

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39317
		FILM NUMBER:		211482737

	MAIL ADDRESS:	
		STREET 1:		ONSEMI C/O L. BELLERJEAU M/D A700
		STREET 2:		5005 EAST MCDOWELL ROAD
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85008

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ON SEMICONDUCTOR CORP
		CENTRAL INDEX KEY:			0001097864
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				363840979
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5005 EAST MCDOWELL ROAD
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85008
		BUSINESS PHONE:		6022446600

	MAIL ADDRESS:	
		STREET 1:		5005 EAST MCDOWELL ROAD
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85008

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SCG HOLDING CORP
		DATE OF NAME CHANGE:	19991027
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-12-07</periodOfReport>

    <issuer>
        <issuerCik>0001097864</issuerCik>
        <issuerName>ON SEMICONDUCTOR CORP</issuerName>
        <issuerTradingSymbol>ON</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001558882</rptOwnerCik>
            <rptOwnerName>El-Khoury Hassane</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5005 EAST MCDOWELL ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PHOENIX</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85008</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <officerTitle>CEO &amp; President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common</value>
            </securityTitle>
            <transactionDate>
                <value>2021-12-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>11783.0000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>65.4500</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>164187.0000</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">This transaction represents shares withheld by the Issuer in connection with the vesting of certain restricted stock units granted to the Reporting Person on December 7, 2020 pursuant to the Issuer's Amended and Restated Stock Incentive Plan and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.</footnote>
        <footnote id="F2">Includes an aggregate of 311 shares, consisting of 146 shares and 165 shares acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan for the calendar quarters ended June 30, 2021 and September 30, 2021, respectively.</footnote>
    </footnotes>

    <remarks>Lauren C. Bellerjeau is signing on behalf of the Reporting Person pursuant to a Power of Attorney attached hereto as Exhibit 24.</remarks>

    <ownerSignature>
        <signatureName>/s/ Lauren C. Bellerjeau, Attorney-in-Fact</signatureName>
        <signatureDate>2021-12-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>elkhoury2021newclopoa.txt
<TEXT>
Exhibit 24

POWER OF ATTORNEY
(Hassane El-Khoury)


	I hereby appoint Pamela L. Tondreau, Lauren C. Bellerjeau, and Thad Trent, and
each of them, attorney-in-fact for me, each with full power of substitution, to
prepare, execute, and deliver on my behalf reports required to be filed by me
pursuant to Section 16 of the Securities Exchange Act of 1934, as amended
("Section 16"), and Rule 144 and Rule 145 under the Securities Act of 1933, as
amended (singly or collectively, "Rule 144"), and any and all related documents
and instruments.  Among other things, each attorney-in-fact is authorized to
file original reports (either electronically or otherwise), signed by me or on
my behalf, on Forms 3, 4, and 5, and Form 144 with the Securities and Exchange
Commission, any and all related documents and instruments, and to provide any
necessary copies of such signed forms, documents, and instruments to The NASDAQ
Stock Market and ON Semiconductor Corporation as required by the rules under
Section 16 and Rule 144 as in effect from time to time.

	This power of attorney is effective from the date hereof and shall remain in
effect until revoked or terminated.

Dated: October 25, 2021

/s/ HASSANE EL-KHOURY
Hassane El-Khoury




</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
