<Page>
                                    ANNEX A
                      2000 STOCK PURCHASE AND OPTION PLAN
                              FOR KEY EMPLOYEES OF
                           AMPHENOL AND SUBSIDIARIES

1.  PURPOSE OF PLAN

    The 2000 Stock Purchase and Option Plan for Key Employees of Amphenol and
Subsidiaries (the "Plan") is designed:

    (a) to promote the long-term financial interests and growth of Amphenol
Corporation (the "Corporation") and its subsidiaries by attracting and retaining
management personnel with the training, experience and ability to enable them to
make a substantial contribution to the success of the Corporation's business;

    (b) to motivate management personnel by means of growth-related incentives
to achieve long-range goals; and

    (c) to further the alignment of interests of participants with those of the
stockholders of the Corporation through opportunities for increased stock, or
stock-based, ownership in the Corporation.

2.  DEFINITIONS

    As used in the Plan, the following words shall have the following meanings:

    (a) "Board of Directors" means the Board of Directors of the Corporation.

    (b) "Code" means the Internal Revenue Code of 1986, as amended.

    (c) "Committee" means the Compensation Committee of the Board of Directors.

    (d) "Common Stock" or "Share" means Series A Common Stock of the Corporation
which may be authorized but unissued, or issued and reacquired.

    (e) "Employee" means a person, including an officer, in the regular
full-time employment of the Corporation or one of its Subsidiaries who, in the
opinion of the Committee, is, or is expected to be, primarily responsible for
the management, growth or protection of some part or all of the business of the
Corporation.

    (f) "Exchange Act" means the Securities Exchange Act of 1934, as amended.

    (g) "Fair Market Value" means such value of a Share as reported for stock
exchange transactions and/or determined in accordance with any applicable
resolutions or regulations of the Committee in effect at the relevant time.

    (h) "Grant" means an award made to a Participant pursuant to the Plan and
described in Paragraph 5, including an award of a Non-Qualified Stock Option or
Purchase Stock.

    (i) "Grant Agreement" means an agreement between the Company and a
Participant that sets forth the terms, conditions and limitations applicable to
a Grant.

    (j) "Management Stockholders' Agreement" means an agreement between the
Corporation and a Participant that sets forth the terms and conditions and
limitations applicable to any Shares purchased pursuant to this Plan.

    (k) "Option" means an option to purchase shares of the Common Stock which
will not be an "incentive stock option" (within the meaning of Section 422 of
the Code).

    (l) "Participant" means an Employee, or other person having a unique
relationship with the Corporation or one of its Subsidiaries, to whom one or
more Grants have been made and such Grants

                                      A-1
<Page>
have not all been forfeited or terminated under the Plan; provided, however,
that a non-employee director of the Corporation or one of its Subsidiaries may
not be a Participant.

    (m) "Subsidiary" shall mean any corporation in an unbroken chain of
corporations beginning with the Corporation if each of the corporations, or
group of commonly controlled corporations, other than the last corporation in
the unbroken chain then owns stock possessing 50% or more of the total combined
voting power of all classes of stock in one of the other corporations in such
chain.

3.  ADMINISTRATION OF PLAN

    (a) The Plan shall be administered by the Committee. None of the members of
the Committee shall be eligible to be selected for Grants under the Plan, or
have been so eligible for selection within one year prior thereto; provided,
however, that the members of the Committee shall qualify to administer the Plan
for purposes of Rule 16b-3 (and any other applicable rule) promulgated under
Section 16(b) of the Exchange Act to the extent that the Corporation is subject
to such rule. The Committee may adopt its own rules of procedure, and action of
a majority of the members of the Committee taken at a meeting, or action taken
without a meeting by unanimous written consent, shall constitute action by the
Committee. The Committee shall have the power and authority to administer,
construe and interpret the Plan, to make rules for carrying it out and to make
changes in such rules. Any such interpretations, rules and administration shall
be consistent with the basic purposes of the Plan.

    (b) The Committee may delegate to the Chief Executive Officer and to other
senior officers of the Corporation its duties under the Plan subject to such
conditions and limitations as the Committee shall prescribe except that only the
Committee may designate and make Grants to Participants who are subject to
Section 16 of the Exchange Act.

    (c) The Committee may employ attorneys, consultants, accountants,
appraisers, brokers or other persons. The Committee, the Corporation, and the
officers and directors of the Corporation shall be entitled to rely upon the
advice, opinions or valuations of any such persons. All actions taken and all
interpretations and determinations made by the Committee in good faith shall be
final and binding upon all Participants, the Corporation and all other
interested persons. No member of the Committee shall be personally liable for
any action, determination or interpretation made in good faith with respect to
the Plan or Grants, and all members of the Committee shall be fully protected by
the Corporation with respect to any such action, determination or
interpretation.

4.  ELIGIBILITY

    The Committee may from time to time make Grants under the Plan to such
Employees, or other persons having a unique relationship with Corporation or any
of its Subsidiaries, and in such form and having such terms, conditions and
limitations as the Committee may determine. No Grants may be made under this
Plan to non-employee directors of Corporation or any of its Subsidiaries. Grants
may be granted singly, in combination or in tandem. The terms, conditions and
limitations of each Grant under the Plan shall be set forth in an Grant
Agreement, in a form approved by the Committee, consistent, however, with the
terms of the Plan and if applicable the Management Stockholders' Agreement.

5.  GRANTS

    From time to time, the Committee will determine the forms and amounts of
Grants for Participants. Such Grants may take the following forms in the
Committee's sole discretion:

    (a) Non-Qualified Stock Options--These are options to purchase Common Stock
which are not designated by the Committee as incentive stock options. At the
time of the Grant the Committee shall

                                      A-2
<Page>
determine, and shall include in the Grant Agreement or other Plan rules, the
option exercise period, the option price, and such other conditions or
restrictions on the grant or exercise of the option as the Committee deems
appropriate, which may include the requirement that the grant of options is
predicated on the acquisition of Purchase Shares under Paragraph 5(d) by the
Optionee. In addition to other restrictions contained in the Plan, an option
granted under this Paragraph 5(a): (i) may not be exercised more than 10 years
after the date it is granted and (ii) may not have an option exercise price less
than the par value of the Common Stock on the date the option is granted.
Payment of the option price shall be made in cash or in shares of Common Stock,
or a combination thereof, in accordance with the terms of the Plan, the Grant
Agreement and of any applicable guidelines of the Committee in effect at the
time.

    (b) Purchase Stock--Purchase Stock refers to shares of Common Stock offered
to a Participant at such price as determined by the Committee, the acquisition
of which will make him eligible to receive under the Plan, including, but not
limited to, Non-Qualified Stock Options; provided, however, that the price of
such Purchase Shares may not be less than the par value of the Common Stock on
the date such shares of Purchase Stock are offered.

6.  LIMITATIONS AND CONDITIONS

    (a) The number of Shares available for Grants under this Plan shall be
1,800,000 shares of the authorized Common Stock as of the effective date of the
Plan. The number of Shares subject to Options under this Plan to any one
Participant shall not be more than 500,000 Shares. Unless restricted by
applicable law, Shares related to Grants that are forfeited, terminated,
cancelled or expire unexercised, shall immediately become available for Grants.

    (b) No Grants shall be granted under the Plan beyond ten years after the
effective date of the Plan, but the terms of Grants granted on or before the
expiration of the Plan may extend beyond such expiration. At the time a Grant is
granted or amended or the terms or conditions of a Grant are changed, the
Committee may provide for limitations or conditions on such Grant or purchase
consistent with the terms of the Management Stockholders' Agreement.

    (c) Nothing contained herein shall affect the right of the Corporation to
terminate any Participant's employment at any time or for any reason.

    (d) Except as provided in the Management Stockholders' Agreement and other
than as specifically provided with regard to the death of a Participant, no
benefit under the Plan shall be subject in any manner to anticipation,
alienation, sale, transfer, assignment, pledge, encumbrance, or charge, and any
attempt to do so shall be void. No such benefit shall, prior to receipt thereof
by the Participant, be in any manner liable for or subject to the debts,
contracts, liabilities, engagements, or torts of the Participant.

    (e) Participants shall not be, and shall not have any of the rights or
privileges of, stockholders of the Corporation in respect of any Shares
purchasable in connection with any Grant unless and until certificates
representing any such Shares have been issued by the Corporation to such
Participants.

    (f) No election as to benefits or exercise of Options or other rights may be
made during a Participant's lifetime by anyone other than the Participant except
by a legal representative appointed for or by the Participant.

    (g) Absent express provisions to the contrary, any Grant under this Plan
shall not be deemed compensation for purposes of computing benefits or
contributions under any retirement plan of the Corporation or its Subsidiaries
and shall not affect any benefits under any other benefit plan of any kind now
or subsequently in effect under which the availability or amount of benefits is
related to level of compensation. This Plan is not a "Retirement Plan" or
"Welfare Plan" under the Employee Retirement Income Security Act of 1974, as
amended.

                                      A-3
<Page>
    (h) Unless the Committee determines otherwise, no benefit or promise under
the Plan shall be secured by any specific assets of the Corporation or any of
its Subsidiaries, nor shall any assets of the Corporation or any of its
Subsidiaries be designated as attributable or allocated to the satisfaction of
the Corporation's obligations under the Plan.

7.  TRANSFERS AND LEAVES OF ABSENCE

    For purposes of the Plan, unless the Committee determines otherwise: (a) a
transfer of a Participant's employment without an intervening period of
separation among the Corporation and any Subsidiary shall not be deemed a
termination of employment, and (b) a Participant who is granted in writing a
leave of absence shall be deemed to have remained in the employ of the
Corporation during such leave of absence.

8.  ADJUSTMENTS

    (a) In the event of any change in the outstanding Common Stock by reason of
a stock split, spin-off, stock dividend, stock combination or reclassification,
recapitalization or merger, change of control, or similar event, the Committee
may adjust appropriately the number of Shares subject to the Plan and available
for or covered by Grants and exercise prices related to outstanding Grants and
make such other revisions to outstanding Grants as it deems are equitably
required.

    (b) In the event that the Participant's right to require the Company to
purchase his or her Shares or Options or the Company's right to require the
Participant to sell his or her Shares or Options, as provided in the Management
Stockholder's Agreement, or the Company's Right of First Refusal as provided in
the Management Stockholder's Agreement, gives rise to adverse accounting
consequences to the Company in respect of the treatment of Options granted
pursuant to the Plan, the Committee may, in its sole discretion, adjust the
timing of the exercisability of such outstanding Options to avoid such adverse
accounting consequences.

9.  MERGER, CONSOLIDATION, EXCHANGE, ACQUISITION, LIQUIDATION OR DISSOLUTION

    In its absolute discretion, and on such terms and conditions as it deems
appropriate, coincident with or after the grant of any Option, the Committee may
provide that such Option cannot be exercised after the merger or consolidation
of the Corporation into another corporation, the exchange of all or
substantially all of the assets of the Corporation for the securities of another
corporation, the acquisition by another corporation of 80% or more of the
Corporation's then outstanding shares of voting stock or the recapitalization,
reclassification, liquidation or dissolution of the Corporation (a
"Transaction"), and if the Committee so provides, it shall, on such terms and
conditions as it deems appropriate, also provide, either by the terms of such
Option or by a resolution adopted prior to the occurrence of such Transaction,
that, for some reasonable period of time prior to such Transaction, such Option
shall be exercisable as to all shares subject thereto, notwithstanding anything
to the contrary herein (but subject to the provisions of Paragraph 6(b)) and
that, upon the occurrence of such event, such Option shall terminate and be of
no further force or effect; provided, however, that the Committee may also
provide, in its absolute discretion, that even if the Option shall remain
exercisable after any such event, from and after such event, any such Option
shall be exercisable only for the kind and amount of securities and/or other
property, or the cash equivalent thereof, receivable as a result of such event
by the holder of a number of shares of stock for which such Option could have
been exercised immediately prior to such event.

10. AMENDMENT AND TERMINATION

    The Committee shall have the authority to make such amendments to any terms
and conditions applicable to outstanding Grants as are consistent with this Plan
provided that, except for adjustments

                                      A-4
<Page>
under Paragraph 8 or 9 hereof, no such action shall modify such Grant in a
manner adverse to the Participant without the Participant's consent except as
such modification is provided for or contemplated in the terms of the Grant.

    The Board of Directors may amend, suspend or terminate the Plan except that
no such action, other than an action under Paragraph 8 or 9 hereof, may be taken
which would, without shareholder approval, increase the aggregate number of
Shares subject to Grants under the Plan, decrease the exercise price of
outstanding Options, change the requirements relating to the Committee or extend
the term of the Plan.

11. FOREIGN OPTIONS AND RIGHTS

    The Committee may make Grants to Employees who are subject to the laws of
nations other than the United States, which Grants may have terms and conditions
that differ from the terms thereof as provided elsewhere in the Plan for the
purpose of complying with foreign laws.

12. WITHHOLDING TAXES

    The Corporation shall have the right to deduct from any cash payment made
under the Plan any federal, state or local income or other taxes required by law
to be withheld with respect to such payment. It shall be a condition to the
obligation of the Corporation to deliver shares upon the exercise of an Option
that the Participant pay to the Corporation such amount as may be requested by
the Corporation for the purpose of satisfying any liability for such withholding
taxes. Any Grant Agreement may provide that the Participant may elect, in
accordance with any conditions set forth in such Grant Agreement, to pay a
portion or all of such withholding taxes in shares of Common Stock.

13. EFFECTIVE DATE AND TERMINATION DATES

    The Plan shall be effective on and as of the date of its approval by the
stockholders of the Corporation and shall terminate ten years later, subject to
earlier termination by the Board of Directors pursuant to Paragraph 10.

                                      A-5