Document:

<PAGE>
                                                                   Exhibit 4.6.2
                                AMENDMENT NO. 2
                                       TO
                          SECOND AMENDED AND RESTATED
                           REVOLVING CREDIT AGREEMENT

     AMENDMENT No. 2 (the "Amendment") dated as of September 29, 2000 is made to
that certain Second Amended and Restated Credit Agreement dated June 30, 1999 as
heretofore amended March 17, 2000 and as may be amended from time to time (the
"Loan Agreement"), by and between AEROVOX INCORPORATED, a Delaware corporation
with a chief executive office at 167 John Vertente Boulevard, New Bedford,
Massachusetts (the "Borrower"), and FLEET CAPITAL CORPORATION, as successor to
BANKBOSTON, N.A., a national banking association with a banking office at One
Hundred Federal Street, Boston, Massachusetts (the "Lender").

     Each of the capitalized terms which are used herein without definition and
which are defined in the Loan Agreement referred to below shall have the same
meaning herein as in the Loan Agreement, as amended hereby.

                                    RECITALS
                                    --------

     The Borrower and the Lender are parties to the Loan Agreement.

     The Borrower and the Lender wish to amend the Loan Agreement to provide for
a temporary and a permanent increase in the Loan Commitment, to provide for a
temporary overadvance facility, to modify certain financial covenants contained
in the Loan Agreement and to otherwise modify terms and conditions of the Loan
Agreement to accommodate such amendments.

                                   AGREEMENT
                                   ---------

NOW, THEREFORE, in consideration of the foregoing premises, the parties hereto
hereby agree as follows:

     (S)1.  Borrowing Base.  The definition of the term "Borrowing Base"
            ---------------
contained in Section 1.1 of the Loan Agreement is hereby modified to read as
follows:

     "Borrowing Base.  At the relevant time of reference thereto, an amount
      --------------
     determined by the Lender by reference to the most recent Borrowing Base
     report delivered to the Lender pursuant to (S)6.4(e), which is equal to the
     sum of:

          (a)  85% of Eligible Receivables owing from account debtors located
               within the United States or a territory thereof or Canada less
               than 60 days past due under the original terms of sale; plus

          (b)  50% of Eligible Receivables owing from account debtors located
               outside the United States and its territories or Canada less than
               30 days past due under the original terms of sale; plus
<PAGE>
                                                                   Exhibit 4.6.2

           (c)  The lesser of (i) 50% of the Eligible Inventory Amount or (ii)
                $7,000,000; plus

           (d)  The Overadvance."

     (S)2. Overadvance.  A new definition is added to Section 1.1 of the Loan
           ------------
Agreement to read as follows, effective only upon confirmation by the Lender
that it has been granted and has perfected a first priority security interest in
the equipment and goods described in Exhibit 2 hereto:

     "Overadvance.  The sum of Five Hundred Thousand Dollars ($500,000.00) from
      -----------
October 31, 2000 through and including March 31, 2001, and thereafter Zero
Dollars ($0.00.)"

     (S)3. Loan Commitment. The definition of the term "Loan Commitment"
           ----------------
contained in Section 2.1 of the Loan Agreement is hereby modified to mean the
amounts set forth below as of the periods set forth below.  A new Second
Amendment and Restatement of the Revolving Credit Note shall be executed and
delivered to the Lender by the Borrower to reflect such change in the Loan
Commitment.

           "October 1-31, 2000     $  16,000,000.00
           November 1-30, 2000     $  16,000,000.00
           December 1-15, 2000     $  16,750,000.00
           December 16-31, 2000    $  16,750,000.00
           January 1-31, 2001      $  16,750,000.00
           February 1-28, 2001     $  16,000,000.00
           March 1-31, 2001        $  15,500,000.00
           Thereafter              $  14,500,000.00."

     (S)4. Interest on Loans. Section 2.4 of the Loan Agreement is hereby
           -----------------
amended to refer to a per annum rate equal to: "(a) the Base Rate plus one half
of one percent (1/2%), or (b) at the Borrower's option as provided herein, at
the Eurodollar rate plus two and one half percent (2 1/2%)."

     (S)5. Collateral Reporting. Section 6.4(e) of the Loan Agreement is hereby
           --------------------
amended to provide that the Borrowing Base Reports, accounts receivable agings
and inventory designation reports shall be provided on Tuesday of each week as
of Friday of the previous week.

     (S)6. Debt Service Coverage. The Debt Service Coverage covenant contained
           ---------------------
in Section 8.2 of the Loan Agreement shall not be tested for the fiscal quarters
ending September 30, 2000 or December 31, 2000. The Debt Service Coverage
covenant is hereby amended to provide that the Borrower shall maintain a ratio
of Adjusted Consolidated Operating Cash Flow to Consolidated Financial
Obligations not less than the ratios set forth below for the periods set forth
below.

           3 months ended March 31, 2001      1.0:1.0
           6 months ended June 30, 2001       1.0:1.0
<PAGE>
                                                                   Exhibit 4.6.2

            9 months ended september 30, 2001  1.0:1.0
            12 months ended December 31, 2001  1.1:1.0

     Thereafter, commencing with the fiscal quarter ending March 31, 2001, the
Borrower shall maintain a ratio of Adjusted Consolidated Operating Cash Flow to
Consolidated Financial Obligations of not less than 1.25:1.0 for the twelve
month period ending on each fiscal quarter end.

     (S)7.  A new financial covenant is added to the Loan Agreement as Section
8.4 thereof to read as follows:

            (S)8.4  Minimum EBITDA. The Borrower shall earn and report to the
                    --------------
Lender earnings before, interest, taxes, depreciation and amortization of at
least $4,000,000.00 for the fiscal year ending December 31, 2000."

     (S)8.  Security Interest. The Borrower shall have executed and delivered to
            -----------------
the Lender an Amendment No. 1 to Second Amended and Restated Security Agreement
in the form of Exhibit 8 annexed hereto granting to the Lender a perfected first
priority security interest in all of the Borrower's equipment, subject only to
purchase money security interests and capital lease interests of record.

     (S)9.  Release of Equipment Security Interests. The Borrower shall cause to
            ---------------------------------------
be executed and delivered to the Lender for filing with the Secretary of the
Commonwealth of Massachusetts and City Clerk of New Bedford, Massachusetts, form
of UCC-3 releases with respect to any general equipment lien or security
interest claimed by any secured party of Borrower (but not of any purchase money
security interest in equipment held by such secured party), including without
limitation the CIT Group, Inc. and KeyBank.

     (S)10. Business and Inventory Locations. Attached hereto as Exhibit 10 is a
            --------------------------------
listing of all of the Borrower's business locations (including domestic and
foreign business locations), the nature of the Borrower's business conducted at
each such location, and a listing of all of the locations where Borrower
maintains inventory or other property, including without limitation all owned
and leased locations and public warehouses in which inventory or other goods may
be stored from time to time. The Borrower will cooperate with the Lender in
causing appropriate UCC-1 financing statement filings to be made in all
locations where such filings may be required and shall further assist the Lender
in procuring appropriate landlord waivers and consents for leased locations and
warehousemen acknowledgments for public warehouse locations.

     (S)11. Lender. All references in the Loan Agreement to the word "Bank"
            ------
shall henceforth be deemed to the references to the word "Lender" which term
shall be deemed to refer to Fleet Capital Corporation.

     (S)12. Amendment Fee. The Borrower shall pay to the Lender in immediately
            -------------
collectible funds an amendment fee in the amount of $10,000.00 as a condition
precedent

<PAGE>
                                                                   Exhibit 4.6.2

to the effectiveness of this Amendment No. 2 to the Loan Agreement. The Borrower
shall also pay the legal fees and out of pocket expenses of the Lender and its
attorneys in the negotiation, preparation and execution and delivery of this
Amendment No. 2 and the documents, instruments and agreements in connection
herewith.

     (S)13.  No Other Changes. Except as specifically amended by this Amendment
             ----------------
No. 2, the Loan Agreement shall remain in full force and effect and the terms
and conditions thereof are ratified and confirmed by the Borrower and the
Lender.

     (S)14.  Representations and Warranties; No Default;. The Borrower hereby
             -------------------------------------------
represents, warrants and covenants to the Lender that each of the
representations and warranties of the Borrower contained in the Loan Agreement
or in any other Loan Document was true and correct as of the date as of which it
was made and is true and correct in all material respects as of the date of this
Amendment No. 2, except to the extent such representations and warranties
expressly related to a prior date (in which case they shall be true and correct
as of such earlier date). No Default or Event of Default has occurred and is
continuing as of the date of this Amendment No. 2. The Borrower also
acknowledges and agrees that the Lender has fully performed all of its
obligations under the Loan Agreement up to and including the date of this
Amendment No. 2.

     (S)6.  Conditions to Effectiveness. Upon receipt by the Lender of this
            ---------------------------
Amendment No. 2 and of the Second Amendment and Restatement of the Revolving
Credit Note executed by the Borrower and payment of the amendment fee and legal
fees and costs of the Lender by the Borrower, this Amendment No. 2 shall be
deemed to be effective as of September 29, 2000.

     (S)7.  Execution in Counterparts. This Amendment No. 2 may be executed in
            -------------------------
any number of counterparts, but all such counterparts shall together constitute
but one integrated instrument. In making proof of this Amendment No. 2, it shall
not be necessary to produce or account for more than one counterpart signed by
each party hereto by and against which enforcement hereof is sought.

     (S)8.  Governing Law. This Amendment shall be construed according to and
            -------------
governed by the laws of the Commonwealth of Massachusetts.

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed as an agreement under seal as of the date set forth at the
beginning of this Amendment.

               SIGNATURE LINES APPEAR ON THE NEXT NUMBERED PAGE.

                                             AEROVOX INCORPORATED

                                             By:  F. Randal Hunt
<PAGE>
                                                                   Exhibit 4.6.2

                                         Title:  Sr. Vice President, Finance
                                                 and CFO

                                       FLEET CAPITAL CORPORATION, as
                                       successor to BANKBOSTON, N.A.

                                         By:  Ruben V. Klein
                                              Vice President<PAGE>

                                                                   Exhibit 4.6.3

                           AMENDMENT AND RESTATEMENT
                                    OF THE
                             REVOLVING CREDIT NOTE

                           Dated as of July 8, 1993

$16,750,000                                                   September 30, 2000

     FOR VALUE RECEIVED, the undersigned AEROVOX INCORPORATED, a Delaware
corporation with its chief executive office at 740 Belleville Avenue, New
Bedford, Massachusetts 02745 (the "Borrower"), hereby absolutely and
unconditionally promises to pay to the order of FLEET NATIONAL BANK, as
successor to BANKBOSTON, N.A., a national banking association with its principal
place of business at 100 Federal Street, Boston, Massachusetts 02110 (the
"Bank"):

     (a)  on the Maturity Date, the Principal Amount of this note or if less,
          the aggregate unpaid principal amount of Loans advanced by the Bank to
          the Borrower pursuant to the Second Amended and Restated Revolving
          Credit Agreement dated as of June 30, 1999, as amended March 17, 2000
          and September 30, 2000 by and between the Borrower and the Bank, as
          amended or supplemented from time to time (the "Credit Agreement");
          and

     (b)  interest on the principal balance hereof from time to time outstanding
          from the date hereof until paid in full, at the times and at the
          applicable interest rate provided in the Credit Agreement.

     For purposes of this Note, the "Principal Amount" shall mean the maximum
principal amount of Loans which the Bank may advance pursuant to the Credit
Agreement during the time periods set forth below.

               Time Period                      Principal Amount
               -----------                      ----------------

               October 1-31, 2000               $16,000,000.00
               November 1-30, 2000              $16,000,000.00
               December 1-15, 2000              $16,750,000.00
               December 16-31, 2000             $16,750,000.00
               January 1-31, 2001               $16,750,000.00
               February 1-28, 2001              $16,000,000.00
               March 1-31, 2001                 $15,500,000.00
               April 1, 2001-Maturity Date      $14,500,000.00

     This Note constitutes an amendment and restatement in its entirety of the
promissory note of the Borrower to the Bank dated as of July 8, 1993 as
previously amended and restated June 30, 1999.
<PAGE>

                                                                   Exhibit 4.6.3

     This Note evidences borrowings under, is subject to the terms and
conditions of, has been issued by the Borrower in accordance with the terms of
the Credit Agreement and is the Note referred to therein.  The Bank and any
holder hereof is entitled to the benefits and subject to the conditions of the
Credit Agreement and may enforce the agreements of the agreements of the
Borrower contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof.  This Note is secured by the
Security Documents described in the Credit Agreement.  Capitalized terms used in
this Note and not otherwise defined herein shall have the same meanings as in
the Credit Agreement.

     The Bank is hereby irrevocably authorized by the Borrower to endorse on the
schedule attached to this Note or a confirmation of such schedule attached
hereto and mad a part hereof, an appropriate notation evidencing advances and
repayments of principal of this Note, provided that failure by the Bank to make
                                      --------
any such notations shall not affect any of the Borrower's obligations or the
validity of any repayments made by the Borrower in respect to this Note.

     The Borrower has the right in certain circumstance and the obligation under
certain other circumstances to repay or prepay the whole or part of the
principal this Note on the terms and conditions specified in the Credit
Agreement.

     If any one or more of the Events of Default shall occur, the entire unpaid
principal amount of this Note an all of the unpaid interest accrued thereon may
become or be declared due and payable in the manner and with the effect provided
in the Credit Agreement.

     The Borrower and every endorser and guarantor of this Note or the
obligations represented hereby waive presentment, demand, notice, protest and
all other demands and notices in connection with the delivery, acceptance,
performance, default or enforcement of this Note, assent to any extension or
postponement of the time of payment or any other indulgence, to any
substitution, exchange or release of collateral and to the addition or release
of any other party or person primarily or secondarily liable.

     This Note shall be deemed to take effect as a sealed instrument under the
laws of the Commonwealth of Massachusetts and for all purposes shall be
construed in accordance with such laws.

     IN WITNESS WHEREOF, the Borrower has caused this Note to be signed by its
duly authorized officer as of September 30, 2000.

     (Corporate Seal)                               AEROVOX INCORPORATED

                                                    F. Randal Hunt

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