Exhibit 24.1

POWER OF ATTORNEY

(Keith D. Jackson)

I hereby appoint Donald A. Colvin, George H. Cave and William J. Nelson, and each of them, my attorneys-in-fact, each with full power of substitution, to sign for me on behalf of the registrant, ON Semiconductor Corporation, and/or as a Director and/or Chief Executive Officer (i.e., as principal executive officer) of ON Semiconductor Corporation and file with the Securities and Exchange Commission the Corporation’s Form 10-K Annual Report for 2008, and any amendments.

Dated: February 27, 2009

/s/ KEITH D. JACKSON

Keith D. Jackson

POWER OF ATTORNEY

(Donald A. Colvin)

I hereby appoint William J. Nelson, Keith D. Jackson and George H. Cave, and each of them, my attorneys-in-fact, each with full power of substitution, to sign for me on behalf of the registrant, ON Semiconductor Corporation, and/or as a Chief Financial Officer and/or Treasurer (i.e., as both principal financial officer and principal accounting officer) of ON Semiconductor Corporation and file with the Securities and Exchange Commission the Corporation’s Form 10-K Annual Report for 2008, and any amendments.

Dated: February 27, 2009

/s/ DONALD A. COLVIN

Donald A. Colvin

POWER OF ATTORNEY

(J. Daniel McCranie)

I hereby appoint Donald A. Colvin, Keith D. Jackson and George H. Cave, and each of them, my attorneys-in-fact, each with full power of substitution, to sign for me as Chairman of the Board of Directors of ON Semiconductor Corporation and file with the Securities and Exchange Commission the Corporation’s Form 10-K Annual Report for 2008, and any amendments.

Dated: February 27, 2009

/s/ J. DANIEL MCCRANIE

J. Daniel McCranie

POWER OF ATTORNEY

(Francis P. Barton)

I hereby appoint Donald A. Colvin, Keith D. Jackson and George H. Cave, and each of them, my attorneys-in-fact, each with full power of substitution, to sign for me as a Director of ON Semiconductor Corporation and file with the Securities and Exchange Commission the Corporation’s Form 10-K Annual Report for 2008, and any amendments.

Dated: February 27, 2009

/s/ FRANCIS P. BARTON

Francis P. Barton

POWER OF ATTORNEY

(Curtis J. Crawford)

I hereby appoint Donald A. Colvin, Keith D. Jackson and George H. Cave, and each of them, my attorneys-in-fact, each with full power of substitution, to sign for me as a Director of ON Semiconductor Corporation and file with the Securities and Exchange Commission the Corporation’s Form 10-K Annual Report for 2008, and any amendments.

Dated: February 27, 2009

/s/ CURTIS J. CRAWFORD

Curtis J. Crawford

POWER OF ATTORNEY

(Emmanuel T. Hernandez)

I hereby appoint Donald A. Colvin, Keith D. Jackson and George H. Cave, and each of them, my attorneys-in-fact, each with full power of substitution, to sign for me as Director of ON Semiconductor Corporation and file with the Securities and Exchange Commission the Corporation’s Form 10-K Annual Report for 2008, and any amendments.

Dated: February 27, 2009

/s/ EMMANUEL T. HERNANDEZ

Emmanuel T. Hernandez

POWER OF ATTORNEY

(Phillip D. Hester)

I hereby appoint Donald A. Colvin, Keith D. Jackson and George H. Cave, and each of them, my attorneys-in-fact, each with full power of substitution, to sign for me as a Director of ON Semiconductor Corporation and file with the Securities and Exchange Commission the Corporation’s Form 10-K Annual Report for 2008, and any amendments.

Dated: February 27, 2009

/s/ PHILLIP D. HESTER

Phillip D. Hester

POWER OF ATTORNEY

(Robert H. Smith)

I hereby appoint Donald A. Colvin, Keith D. Jackson and George H. Cave, and each of them, my attorneys-in-fact, each with full power of substitution, to sign for me as a Director of ON Semiconductor Corporation and file with the Securities and Exchange Commission the Corporation’s Form 10-K Annual Report for 2008, and any amendments.

Dated: February 27, 2009

/s/ ROBERT H. SMITH

Robert H. Smith