PLEXUS CORP.

DIRECTOR NONQUALIFIED STOCK OPTION AGREEMENT

     
TO:
 

 
   
DATE:
 

In order to provide additional incentive through stock ownership for directors
of Plexus Corp. (the “Corporation”), you (the “Grantee”) are hereby granted a
Stock Option (“Option”) effective as of (the “Grant Date”), to purchase shares
of the Corporation’s Common Stock at a price per share of . This Option is
subject to the terms and conditions set forth in this Agreement and in the
Plexus Corp. 2005 Equity Incentive Plan (the “Plan”), the terms of which are
incorporated herein by reference.

1. Number of Shares Optioned; Exercise Price. The Corporation grants to Grantee
a nonqualified stock option to purchase, on the terms and conditions hereof and
of the Plan, all or any part of an aggregate of      shares of the Corporation’s
Common Stock, $.01 par value, at the purchase price of $    per share.

2. Period of Exercise. [One of the following alternatives shall be designated.
If no alternative is designated, Alternative 1 shall apply]:

/     / Alternative 1: This option shall become exercisable beginning six months
from the date of grant, regardless of whether the Grantee is still a Director on
such date.

/     / Alternative 2: This Option shall become exercisable in accordance with
the vesting schedule established by the Committee at the time of grant and set
forth below:

All rights to exercise this option shall terminate upon the earlier of (a) ten
(10) years from the date the option is granted, or (b) one (1) year from the
date the Grantee ceases to be a Director.

3. Method of Exercising Option. Grantee may exercise this option by logging on
to www.etrade.com/stockplans.com or by calling E*Trade at 800.838.0908 in the
U.S. or 1.650.599.0125 outside the U.S. The website provides detailed
instructions on how to exercise stock options as well as other relevant
information pertaining to the grant. An “insider” is subject to blackout
restrictions which may prevent exercise during certain time periods referred to
as the ‘blackout period”. If you are considered an “insider” you have been
notified of the restrictions via email.

4. No Rights in Shares Until Issued. Neither the Grantee nor Grantee’s heirs,
executor or administrator shall be, or have any of the rights or privileges of,
a stockholder of the Corporation in respect of any of the shares issuable upon
the exercise of the option herein granted, unless and until such shares are
fully paid and issued to him/her upon exercise of this Option.

5. Option Not Transferable During Grantee’s Lifetime. This option shall not be
transferable by Grantee other than by last will and testament or by the laws of
descent and distribution. During Grantee’s lifetime, this option shall be
exercisable only by Grantee or Grantee’s guardian or legal representative. In
the event of the Grantee’s death, the personal representative of the Grantee’s
estate or the person or persons to whom the Option is transferred by will or the
laws of descent and distribution may exercise the Option in accordance with its
terms.

6. Effect of Change in Stock. In the event of a reorganization,
recapitalization, stock split, stock dividend, merger, consolidation, rights
offering or like transaction, the Committee shall make or provide for such
adjustment in the exercise price of the option or in the number of kinds of
stock covered by the option as it may, in its discretion, deem to be equitable
provided, however, in the event of (a) the merger or consolidation of the
Corporation with or into another corporation or corporations in which the
Corporation is not the surviving corporation, (b) the adoption of any plan for
the dissolution of the Corporation, or (c) the sale or exchange of all or
substantially all the assets of the Corporation for cash or for shares of stock
or other securities of another corporation, the Committee may elect to cancel
this option. In the event the option is canceled, the Corporation, or the
corporation assuming the obligations of the Corporation hereunder, shall pay
Grantee an amount of cash or stock, as determined by the Committee, equal to the
Fair Market Value per share of the Stock immediately preceding such cancellation
over the option exercise price, multiplied by the number of shares subject to
the option.

7. Liquidation. Anything contained herein to the contrary notwithstanding, upon
the complete liquidation of the Corporation, this option shall be canceled.

8. Successors. This agreement shall be binding upon and inure to the benefit of
any successor or successors of the Corporation.

9. Wisconsin Contract. This option has been granted in Wisconsin and shall be
construed under the laws of that state.

To accept this grant, agreement and other linked materials please logon with
your user name and password to www.etrade.com/stockplans.com and select the
Stock Options page. This grant will be listed at the bottom of all prior grants
and will be labeled in the status column as “Requires Acceptance”. Clicking on
this link will take you to the Grant Acceptance page which will allow you to
view and print (recommended) all applicable documents related to this grant. To
accept the grant and all applicable documents you will type in your password and
click accept. By accepting this grant online you acknowledge and accept this
grant and the terms and conditions. You also acknowledge receipt of this Stock
Option Agreement, a copy of the 2005 Equity Incentive Plan, and a copy of the
Insider Trading Restrictions and Policies. If this grant is not accepted online
within 30 days from the grant date of this Agreement, this Option will be deemed
refused and may be withdrawn.

The terms of the Plan shall have precedence over any terms in this Agreement
that are inconsistent therewith.

PLEXUS CORP.

By: /s/ Joseph D. Kaufman
Secretary