<SEC-DOCUMENT>0001225208-20-012316.txt : 20201007
<SEC-HEADER>0001225208-20-012316.hdr.sgml : 20201007
<ACCEPTANCE-DATETIME>20201007173555
ACCESSION NUMBER:		0001225208-20-012316
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20201001
FILED AS OF DATE:		20201007
DATE AS OF CHANGE:		20201007

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Jatou Ross
		CENTRAL INDEX KEY:			0001826559

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39317
		FILM NUMBER:		201229698

	MAIL ADDRESS:	
		STREET 1:		5005 EAST MCDOWELL ROAD
		STREET 2:		A700
		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>3
<SEQUENCE>1
<FILENAME>doc3.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2020-10-01</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001826559</rptOwnerCik>
            <rptOwnerName>Jatou Ross</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5005 EAST MCDOWELL ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PHOENIX</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85008</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>SVP &amp; GM, ISG</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25638.0000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks>Lauren C. Bellerjeau is signing on behalf of the Reporting Person pursuant to a Power of Attorney attached hereto as Exhibit jatou2020poa.txt</remarks>

    <ownerSignature>
        <signatureName>/s/ Lauren C. Bellerjeau, Attorney-in-Fact</signatureName>
        <signatureDate>2020-10-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>jatou2020poa.txt
<TEXT>

POWER OF ATTORNEY
(Ross Jatou)


	I hereby appoint George H. Cave, Lauren C. Bellerjeau, and Bernard Gutmann, 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: September 24, 2020

/s/ ROSS JATOU
Ross Jatou




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