1 EXHIBIT 23 [PRICEWATERHOUSECOOPERS LLP LETTERHEAD] CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (File No. 33-23490 and File No. 333-06469) of Plexus Corp. of our report dated April 29, 1999 appearing on page 1 of the Financial Statements of Plexus Corp. Employee Stock Savings Plan included in this Annual Report on Form 11-K. /s/ PricewaterhouseCoopers LLP Milwaukee, Wisconsin June 25, 1999