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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED STATES</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">&#160;SECURITIES AND EXCHANGE COMMISSION</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington, D.C. 20549</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM&nbsp;8-K</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT REPORT</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">&#160;Pursuant to Section&nbsp;13 or 15(d)&nbsp;of the Securities Exchange Act of 1934</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of report (Date of earliest event reported):<b>&nbsp;August&nbsp;16, 2013</b></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">INTERNATIONAL RECTIFIER CORPORATION</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact Name of Registrant as Specified in Charter)</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Delaware</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">001-7935</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">95-1528961</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">101 N. Sepulveda Blvd., El Segundo, California 90245</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(310) 726-8000</font></b></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box below if the Form&nbsp;8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</font></p>
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<p style="margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)</font></p>
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<p style="margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></p>
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<p style="margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17 CFR 240.14d-2(b))</font></p>
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<p style="margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act (17 CFR 240.13e-4(c))</font></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 2.02.&nbsp; Results of Operations and Financial Condition</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On August&nbsp;19, 2013,&nbsp;International Rectifier Corporation (the &#147;Company&#148;) issued a press release announcing its financial results for the fourth fiscal quarter and full year of fiscal year 2013.&nbsp; A copy of the press release is furnished as Exhibit&nbsp;99.1 to this report and is incorporated herein by reference.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The information in this Item 2.02 of this Report on Form&nbsp;8-K, including Exhibit&nbsp;99.1, will not be treated as &#147;filed&#148; for the purposes of Section&nbsp;18 of the Securities Exchange Act of 1934 (the &#147;Exchange Act&#148;) or otherwise subject to the liabilities of that section. &nbsp;This information will not be incorporated by reference into a filing under the Securities Act of 1933, or into another filing under the Exchange Act, unless that filing expressly refers to specific information in this report.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item&nbsp;5.03.&nbsp;&nbsp;&nbsp;&nbsp;Amendments to Articles of Incorporation or Bylaws</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On August&nbsp;16, 2013, the Board of Directors (&#147;Board&#148;) of the Company approved an amendment to the Company&#146;s Amended and Restated Bylaws by adding a new Article&nbsp;X, effective as of August&nbsp;16, 2013, providing that:</font></p>
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<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Unless the Company consents in writing to the selection of an alternative forum, the sole and exclusive forum for:</font></p>
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<p style="margin:0in 0in .0001pt 45.5pt;text-indent:-.25in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(a)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">any derivative action or proceeding brought on behalf of the Company,</font></p>
<p style="margin:0in 0in .0001pt 45.5pt;text-indent:-.25in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt 27.35pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(b)&nbsp;any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of the Company&#160;&#160; to the Company or the Company&#146;s stockholders,</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt 27.35pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(c)&nbsp;any action asserting a claim against the Company or any director or officer or other employee of the Company arising pursuant to the Delaware General Corporation Law or the Company&#146;s certificate of incorporation or Bylaws (as either may be amended from time to time), or</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt 27.35pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)&nbsp;any action asserting a claim against the Company or any director or officer or other employee of the Company governed by the internal affairs doctrine of the State of Delaware</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">shall be a state court located within the State of Delaware (or, if no state court located within the State of Delaware has jurisdiction, the federal district court for the District of Delaware).</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The above description is qualified in its entirety to the copy of the Company&#146;s Amended and Restated Bylaws attached hereto as Exhibit&nbsp;3.1 and incorporated herein by reference.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item&nbsp;7.01.&nbsp;&nbsp;&nbsp;&nbsp;Regulation&nbsp;FD Disclosure</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On August&nbsp;19, 2013, the Company issued a press release announcing its financial results for the fourth fiscal quarter and full year of fiscal year 2013.&nbsp; A copy of the press release is furnished as Exhibit&nbsp;99.1 to this report and is incorporated herein by reference.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The Company&#146;s Board has approved November&nbsp;4, 2013 as the date of the Company&#146;s 2013 Annual Meeting of Stockholders.&nbsp; The record date for the 2013 Annual Meeting of Stockholders has been set by the Board to be September&nbsp;13, 2013.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The information in this Item&nbsp;7.01, of this Current Report on Form&nbsp;8-K, including Exhibit&nbsp;99.1, will not be treated as filed for the purposes of Section&nbsp;18 of the Exchange Act or otherwise subject to the liabilities of that section. This information will not be incorporated by reference into a filing under the Securities Act of 1933, or into another filing under the Exchange Act, unless that filing expressly refers to specific information in this report. The furnishing of the information in this Item&nbsp;7.01 of this report is not intended to, and does not, constitute a representation that such furnishing is required by Regulation&nbsp;FD or that the information in this Item&nbsp;7.01 is material investor information that is not otherwise publicly available.</font></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 9.01.&nbsp; Financial Statement and Exhibits</font></b></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)&nbsp; Exhibits</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Amended   and Restated Bylaws of International Rectifier Corporation, amended as of   August&nbsp;16, 2013.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press   release of International Rectifier Corporation, dated August&nbsp;19, 2013,   reporting financial results for the&nbsp;fourth quarter and full year of   fiscal year 2013.</font></p>    </td>   </tr>  </table>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2<a name="PB_2_074328_2897"></a></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>
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<p style="margin:0in 0in .0001pt;text-indent:60.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">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 hereunto duly authorized.</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date:   August&nbsp;19, 2013</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">INTERNATIONAL   RECTIFIER CORPORATION</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/   Timothy E. Bixler</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Timothy   E. Bixler</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Vice   President, General Counsel and Secretary</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3<a name="PB_3_074328_3020"></a></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">EXHIBIT&nbsp;INDEX</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit&nbsp;Number</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Amended   and Restated Bylaws of International Rectifier Corporation, amended as of   August&nbsp;16, 2013.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press   release of International Rectifier Corporation, dated August&nbsp;19, 2013,   reporting financial results for the fourth quarter and full year of fiscal   year 2013.</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4<a name="PB_4_074328_7748"></a></font></p>
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UNITED STATES
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
Date of report (Date of earliest event reported):
August 16, 2013
INTERNATIONAL RECTIFIER CORPORATION
(Exact Name of Registrant as Specified in Charter)
Delaware
001-7935
95-1528961
(State or Other Jurisdiction of Incorporation)
(Commission File Number)
(IRS Employer Identification No.)
101 N. Sepulveda Blvd., El Segundo, California 90245
(Address of Principal Executive Offices) (Zip Code)
(310) 726-8000
(Registrant's telephone number, including area code)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
o
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 2.02.  Results of Operations and Financial Condition
On August 19, 2013, International Rectifier Corporation (the "Company") issued a press release announcing its financial results for the fourth fiscal quarter and full year of fiscal year 2013.  A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference.
The information in this Item 2.02 of this Report on Form 8-K, including Exhibit 99.1, will not be treated as "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934 (the "Exchange Act") or otherwise subject to the liabilities of that section.  This information will not be incorporated by reference into a filing under the Securities Act of 1933, or into another filing under the Exchange Act, unless that filing expressly refers to specific information in this report.
Item 5.03.    Amendments to Articles of Incorporation or Bylaws
On August 16, 2013, the Board of Directors ("Board") of the Company approved an amendment to the Company's Amended and Restated Bylaws by adding a new Article X, effective as of August 16, 2013, providing that:
Unless the Company consents in writing to the selection of an alternative forum, the sole and exclusive forum for:
(a)
any derivative action or proceeding brought on behalf of the Company,
(b) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of the Company   to the Company or the Company's stockholders,
(c) any action asserting a claim against the Company or any director or officer or other employee of the Company arising pursuant to the Delaware General Corporation Law or the Company's certificate of incorporation or Bylaws (as either may be amended from time to time), or
(d) any action asserting a claim against the Company or any director or officer or other employee of the Company governed by the internal affairs doctrine of the State of Delaware
shall be a state court located within the State of Delaware (or, if no state court located within the State of Delaware has jurisdiction, the federal district court for the District of Delaware).
The above description is qualified in its entirety to the copy of the Company's Amended and Restated Bylaws attached hereto as Exhibit 3.1 and incorporated herein by reference.
Item 7.01.    Regulation FD Disclosure
On August 19, 2013, the Company issued a press release announcing its financial results for the fourth fiscal quarter and full year of fiscal year 2013.  A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference.
The Company's Board has approved November 4, 2013 as the date of the Company's 2013 Annual Meeting of Stockholders.  The record date for the 2013 Annual Meeting of Stockholders has been set by the Board to be September 13, 2013.
The information in this Item 7.01, of this Current Report on Form 8-K, including Exhibit 99.1, will not be treated as filed for the purposes of Section 18 of the Exchange Act or otherwise subject to the liabilities of that section. This information will not be incorporated by reference into a filing under the Securities Act of 1933, or into another filing under the Exchange Act, unless that filing expressly refers to specific information in this report. The furnishing of the information in this Item 7.01 of this report is not intended to, and does not, constitute a representation that such furnishing is required by Regulation FD or that the information in this Item 7.01 is material investor information that is not otherwise publicly available.
Item 9.01.  Financial Statement and Exhibits
(d)  Exhibits
Exhibit Number
Description
3.1
Amended   and Restated Bylaws of International Rectifier Corporation, amended as of   August 16, 2013.
99.1
Press   release of International Rectifier Corporation, dated August 19, 2013,   reporting financial results for the fourth quarter and full year of   fiscal year 2013.
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 hereunto duly authorized.
Date:   August 19, 2013
INTERNATIONAL   RECTIFIER CORPORATION
By:
/s/   Timothy E. Bixler
Name:
Timothy   E. Bixler
Title:
Vice   President, General Counsel and Secretary
3
EXHIBIT INDEX
Exhibit Number
Description
3.1
Amended   and Restated Bylaws of International Rectifier Corporation, amended as of   August 16, 2013.
99.1
Press   release of International Rectifier Corporation, dated August 19, 2013,   reporting financial results for the fourth quarter and full year of fiscal   year 2013.
4