Document:

<PAGE>
                                                                    EXHIBIT 10.1

BY FAX:  414-765-2625

December 23, 2002

Mr. Anthony Maggiore
Director, Capital Markets
Bank One, NA
111 East Wisconsin Ave., 4th Floor
Milwaukee WI 53201

Dear Mr. Maggiore:

In accordance with Section 2.5 (A) of the $250,000,000 Credit Agreement dated as
of October 25, 2000 among Plexus Corp. and the parties thereto as lenders, Bank
One, NA, as administrative agent, ABN Amro Bank N.V. as syndication agent and
Firstar Bank, N.A. as documentation agent (the "Credit Agreement"), this letter
is to request permanent reduction in whole of the Aggregate Commitment (from its
present level of to $150,000,000 to $0 [zero dollars]), effective immediately.

Thank you very much.

Yours truly,

George W.F. Setton
Corporate Treasurer &
Chief Treasury Officer<PAGE>
                                                                    EXHIBIT 10.2

                    LIMITED WAIVER AND SEVENTH AMENDMENT TO
                         RECEIVABLES PURCHASE AGREEMENT

         This LIMITED WAIVER AND SEVENTH AMENDMENT TO RECEIVABLES PURCHASE
AGREEMENT (this "Amendment") is entered into as of January 28, 2003, and amends
that certain Receivables Purchase Agreement, dated as of October 6, 2000,
amended as of July 1, 2001, further amended as of October 3, 2001, further
amended as of April 25, 2002, further amended as of June 28, 2002, further
amended as of September 30, 2002, and further amended as of December 4, 2002
(such agreement, as so amended, the "Existing Agreement"), by and among Plexus
ABS, Inc., a Nevada corporation ("Seller"), Plexus Corp., a Wisconsin
corporation ("Plexus"), as initial Servicer (the Servicer together with Seller,
the "Seller Parties" and each a "Seller Party"), the Financial Institutions
party thereto from time to time, Preferred Receivables Funding Corporation
("PREFCO") and Bank One, NA (Main Office Chicago), as agent for the Purchasers
thereunder and any successor agent thereunder (together with its successors and
assigns thereunder, the "Agent"). Capitalized terms used herein and not
otherwise defined shall have the respective meanings set forth in the Existing
Agreement.

                                R E C I T A L S:

         WHEREAS, the Seller Parties, the Financial Institutions, PREFCO and the
Agent are parties to the Existing Agreement;

         WHEREAS, each Seller Party has requested that the Agent, the Financial
Institutions and PREFCO grant certain waivers with respect to certain provisions
of the Existing Agreement as more fully described herein; and

         WHEREAS, the Seller Parties, the Financial Institutions, PREFCO and the
Agent desire to amend certain provisions of the Existing Agreement as more fully
described herein.

         NOW, THEREFORE, in consideration of the premises, and for other good
and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby agree as follows:

         Section 1. Limited Waiver. Subject to the terms and conditions set
forth herein, each of the Purchasers and the Agent hereby waives any
Amortization Event that has occurred prior to the date hereof with respect to
Section 9.1(e) of the Purchase Agreement solely as a result of Seller allowing
the Purchaser Interests of the Purchasers to exceed 100% during the period
starting on November 1, 2002 and ending on November 30, 2002.

         Section 2. Amendments. Subject to the terms and conditions set forth
herein, the Existing Agreement is hereby amended by:

                  (a) replacing the definition of "Aggregate Reserves" set forth
in Exhibit I of the Existing Agreement in its entirety with the following:
<PAGE>
                  "Aggregate Reserves" means, on any date of determination, an
         amount equal to the sum of (i) the Aggregate Reserve Percentage Amount
         as of such date, plus (ii) the sum of all True-Up Amounts as of such
         date.

                  (b) replacing the definition of "Concentration Limit" set
forth in Exhibit I of the Existing Agreement in its entirety with the following:

                  "Concentration Limit" means, at any time, (a) for any Obligor
         other than as described in part (b) of this definition or cancelled
         pursuant to this definition, 8.33% of the aggregate Outstanding Balance
         of all Eligible Receivables at such time, (b)(i) for Motorola, Inc., 9%
         of the aggregate Outstanding Balance of all Eligible Receivables at
         such time, (ii) for Arrowpoint Communications, Inc. and Cisco Systems,
         Inc., collectively and not individually, 12.50% of the aggregate
         Outstanding Balance of all Eligible Receivables at such time, (iii) for
         General Electric Company, 25% of the aggregate Outstanding Balance of
         all Eligible Receivables at such time and (iv) for Siemens AG, 12.50%
         of the aggregate Outstanding Balance of all Eligible Receivables at
         such time (each of the foregoing, a "Special Obligor Concentration
         Limit") or (c) for any Obligor, such other amount for such Obligor
         designated by the Agent (each such other amount, a "Special
         Concentration Limit"); provided, that in the case of an Obligor and any
         Affiliate of such Obligor, the Concentration Limit shall be calculated
         as if such Obligor and such Affiliate are one Obligor; and provided,
         further, that Company or the Required Financial Institutions may, upon
         not less than three Business Days' notice to Seller, cancel any Special
         Obligor Concentration Limit or Special Concentration Limit.

                  (c) adding, in appropriate alphabetical order, the following
new definition to Exhibit I to the Existing Agreement:

                  "Aggregate Reserve Percentage Amount" means, on any date of
         determination, an amount equal to thirty-one percent (31%) of the Net
         Receivables Balance on such date.

                  "True-Up Amount" means, as of any date of determination, for
         each Obligor an amount equal to (i) the Concentration Limit for such
         Obligor as of such date, minus (ii) the Aggregate Reserve Percentage
         Amount as of such date; provided that the "True-Up Amount" for any
         Obligor shall in no event be less than zero.

         Section 3. Conditions to Effectiveness of this Amendment. This
Amendment shall become effective as of the date hereof, upon the satisfaction of
the following conditions precedent:

                                      -2-
<PAGE>
                  (a) Amendment. This Amendment shall have been duly executed
and delivered by each of the parties hereto.

                  (b) Officer's Certificate. The Agent shall have received a
certificate of an authorized officer of each of the Servicer and Seller in the
forms set forth as Exhibits A and B, respectively, certifying as to matters set
forth in Sections 4(a) and (b) of this Amendment.

         Section 4. Representations and Warranties. Each of Seller and the
Servicer represents and warrants to the Financial Institutions, PREFCO and the
Agent that, as of the date hereof, after giving effect to this Amendment:

                  (a) no Amortization Event or Potential Amortization Event has
occurred and is continuing; and

                  (b) all of the representations and warranties contained in the
Existing Agreement and in the other Transaction Documents are true and correct.

         Section 5.  Miscellaneous.

                  (a) Effect; Ratification. The amendments and waiver set forth
herein are effective solely for the purposes set forth herein and shall be
limited precisely as written, and shall not be deemed to (i) be a consent to any
amendment, waiver or modification of any other term or condition of the Existing
Agreement or of any other instrument or agreement referred to therein; or (ii)
prejudice any right or remedy which the Financial Institutions, PREFCO or the
Agent may now have or may have in the future under or in connection with the
Existing Agreement, as amended hereby, or any other instrument or agreement
referred to therein. Each reference in the Existing Agreement to "this
Agreement," "herein," "hereof" and words of like import and each reference in
the other Transaction Documents to the "Receivables Purchase Agreement," the
"Purchase Agreement" or the Existing Agreement shall mean the Existing Agreement
as amended hereby. This Amendment shall be construed in connection with and as
part of the Existing Agreement and all terms, conditions, representations,
warranties, covenants and agreements set forth in the Existing Agreement and
each other instrument or agreement referred to therein, except as herein
amended, are hereby ratified and confirmed and shall remain in full force and
effect.

                  (b) Transaction Documents. This Amendment is a Transaction
Document executed pursuant to the Existing Agreement and shall be construed,
administered and applied in accordance with the terms and provisions thereof.

                  (c) Costs, Fees and Expenses. Seller agrees to reimburse the
Agent and each Purchaser on demand for all costs, fees and expenses (including
the reasonable fees and expenses of counsel to the Agent and the Purchasers)
incurred in connection with the preparation, execution and delivery of this
Amendment.

                                      -3-
<PAGE>
                  (d) Counterparts. This Amendment may be executed in any number
of counterparts, each such counterpart constituting an original and all of which
when taken together shall constitute one and the same instrument.

                  (e) Severability. Any provision contained in this Amendment
which is held to be inoperative, unenforceable or invalid in any jurisdiction
shall, as to that jurisdiction, be inoperative, unenforceable or invalid without
affecting the remaining provisions of this Amendment in that jurisdiction or the
operation, enforceability or validity of such provision in any other
jurisdiction.

                  (f) GOVERNING LAW. THIS AMENDMENT SHALL BE GOVERNED BY, AND
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF ILLINOIS.

                            (Signature Page Follows)

                                      -4-
<PAGE>
         IN WITNESS WHEREOF, the parties hereto have executed this Amendment as
of the date first written above.

                                          PLEXUS ABS, INC.

                                          By:
                                             -----------------------------------
                                          Name:
                                               ---------------------------------
                                          Title:
                                                --------------------------------

                                          PLEXUS CORP.

                                          By:
                                             -----------------------------------
                                          Name:
                                               ---------------------------------
                                          Title:
                                                --------------------------------

                                         PREFERRED RECEIVABLES FUNDING
                                         CORPORATION

                                         By:
                                            ------------------------------------
                                                    Authorized Signer

                                         BANK ONE, NA (MAIN OFFICE CHICAGO),
                                         as a Financial Institution and as Agent

                                          By:
                                             -----------------------------------
                                          Name:
                                               ---------------------------------
                                          Title:
                                                --------------------------------

                                      -5-
<PAGE>
                                                                       EXHIBIT A

                              OFFICER'S CERTIFICATE

                  I, ______________, am the _______________ of Plexus Corp. (the
"Servicer"). I execute and deliver this Officer's Certificate, dated as of
January 28, 2003, on behalf of the Servicer pursuant to Section 3(b) of the
Limited Waiver and Seventh Amendment to Receivables Purchase Agreement (the
"Amendment"), dated as of the date hereof, among the Seller Parties, the
Financial Institutions, PREFCO and the Agent (each as defined therein), amending
certain provisions of that certain Receivables Purchase Agreement, dated as of
October 6, 2000, amended as of July 1, 2001, further amended as of October 3,
2001, further amended as of April 25, 2002, further amended as of June 28, 2002,
further amended as of September 30, 2002, and further amended as of December 4,
2002 (such agreement, as so amended, the "Existing Agreement"), among the Seller
Parties, the Financial Institutions, PREFCO and the Agent. Capitalized terms
used herein and not defined herein shall have the meanings set forth for such
terms in the Existing Agreement.

                  I hereby certify, on behalf of the Servicer, that to the best
of my knowledge after due inquiry, as of the date hereof, after giving effect to
the Amendment, (a) no Amortization Event or Potential Amortization Event has
occurred and is continuing and (b) the representations and warranties of the
Servicer contained in the Existing Agreement and in the other Transaction
Documents are true and correct as of the date hereof.

                                     ----------------------------------
                                     Name:
                                     Title:

                                      -6-
<PAGE>
                                                                       EXHIBIT B

                              OFFICER'S CERTIFICATE

                  I, ______________, am the _______________ of Plexus ABS, Inc.
("Seller"). I execute and deliver this Officer's Certificate, dated as of
January 28, 2003, on behalf of Seller pursuant to Section 3(b) of the Limited
Waiver and Seventh Amendment to Receivables Purchase Agreement (the
"Amendment"), dated as of the date hereof, among the Seller Parties, the
Financial Institutions, PREFCO and the Agent (each as defined therein), amending
certain provisions of that certain Receivables Purchase Agreement, dated as of
October 6, 2000, amended as of July 1, 2001, further amended as of October 3,
2001, further amended as of April 25, 2002, further amended as of June 28, 2002,
further amended as of September 30, 2002, and further amended as of December 4,
2002 (such agreement, as so amended, the "Existing Agreement"), among the Seller
Parties, the Financial Institutions, PREFCO and the Agent. Capitalized terms
used herein and not defined herein shall have the meanings set forth for such
terms in the Existing Agreement.

                  I hereby certify, on behalf of Seller, that to the best of my
knowledge after due inquiry, as of the date hereof, after giving effect to the
Amendment, (a) no Amortization Event or Potential Amortization Event has
occurred and is continuing and (b) the representations and warranties of Seller
contained in the Existing Agreement and in the other Transaction Documents are
true and correct as of the date hereof.

                                     ----------------------------------
                                     Name:
                                     Title:

                                      -7-

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