Filed pursuant to Rule 424(b)(3)
                                                           File Number 333-51548

PROSPECTUS SUPPLEMENT NO. 7

                                 $4,657,500,000

                            Tyco International Ltd.

                     Liquid Yield Option(TM) Notes Due 2020
                             (Zero Coupon--Senior)
                                      and
                          Common Shares Issuable Upon
                    Conversion and/or Purchase of the LYONs

   This prospectus supplement supplements the prospectus dated December 18,
2000 of Tyco International Ltd., as supplemented December 21, 2000, January 5,
2001, January 12, 2001, January 25, 2001, February 9, 2001 and February 26,
2001, relating to the sale by certain of our securityholders (including their
pledgees, donees, assignees, transferees, successors and others who later hold
any of our securityholders' interests) of up to $4,657,500,000 aggregate
principal amount at maturity of LYONs and the common shares issuable upon
conversion, and/or purchase by us, of the LYONs. You should read this
prospectus supplement in conjunction with the prospectus, and this prospectus
supplement is qualified by reference to the prospectus, except to the extent
that the information in this prospectus supplement supersedes the information
contained in the prospectus. Capitalized terms used in this prospectus
supplement and not otherwise defined herein have the meanings specified in the
prospectus.

   The table of Selling Securityholders contained in the prospectus is hereby
amended to add the entities who are named below as selling securityholders.



                            Aggregate
                         Principal Amount                 Number of
                          at Maturity of  Percentage of Common Shares Percentage of
                          LYONs That May      LYONs      That May be  Common Shares
Name                         be Sold       Outstanding     Sold(1)    Outstanding(2)
----                     ---------------- ------------- ------------- --------------
                                                          
Banc of America Securi-
 ties LLC...............   $ 44,400,000          *          457,382          *
BNP Paribas.............     31,000,000          *          319,343          *
Oppenheimer Convertible
 Securities Fund........     28,000,000          *          288,439          *

Additionally, the following represents updated information regarding the
selling securityholders listed in the Selling Securityholder table in the
prospectus:


                            Aggregate
                         Principal Amount                 Number of
                          at Maturity of  Percentage of Common Shares Percentage of
                          LYONs That May      LYONs      That May be  Common Shares
Name                         be Sold       Outstanding     Sold(1)    Outstanding(2)
----                     ---------------- ------------- ------------- --------------
                                                          
Merrill Lynch, Pierce,
 Fenner & Smith, Incor-
 porated (3)............   $141,535,000       3.0%        1,458,008          *
All other holders of
 LYONs or future
 transferees, pledgees,
 donees, assignees or
 successors of any such
 holders (4)(5).........   $435,190,958       9.3%        4,483,076          *

--------
 * Less than one percent (1%).

(1) Assumes conversion of all of the holder's LYONs at a conversion rate of
    10.3014 common shares per $1,000 principal amount at maturity of the LYONs.
    This conversion rate is subject to adjustment, however, as described under
    "Description of the LYONs--Conversion Rights--Conversion Rate and Delivery
    of Common Shares." As a result, the number of common shares issuable upon
    conversion of the LYONs may increase or decrease in the future. Does not
    include common shares that may be issued by us upon purchase of LYONs by us
    at the option of the holder.
(2) Calculated based on Rule 13d-3(d)(i) of the Exchange Act, using
    1,748,649,762 common shares outstanding as of December 6, 2000. In
    calculating this amount for each holder, we treated as outstanding the
    number of common shares issuable upon conversion of all of that holder's
    LYONs, but we did not assume conversion of any other holder's LYONs. Does
    not include common shares that may be issued by us upon purchase of LYONs
    by us at the option of the holder.
(3) Merrill Lynch, Pierce, Fenner & Smith Incorporated and Tyco International
    Ltd. and its affiliates have, within the past three years, engaged in, and
    may in the future engage in, investment banking and other commercial
    dealings, and Merrill Lynch acted as the initial purchaser in the private
    placement in which the LYONs were originally issued. Merrill Lynch has
    received customary fees and commissions for these transactions.
(4) Information about other selling securityholders will be set forth in
    prospectus supplements, if required.
(5) Assumes that any other holders of LYONs, or any future pledgees, donees,
    assignees, transferees or successors of or from any such other holders of
    LYONs, do not beneficially own any common shares other than the common
    shares issuable upon conversion of the LYONs at the initial conversion
    rate.

   Investing in the LYONs involves risks that are described in the "Risk
Factors Relating to the LYONs" section beginning on page 12 of the prospectus.

   Neither the Securities and Exchange Commission, any state securities
commission nor any other regulatory body has approved or disapproved of these
securities or determined if this prospectus is truthful or complete. Any
representation to the contrary is a criminal offense.

            The date of this prospectus supplement is March 9, 2001.

(TM)Trademark of Merrill Lynch & Co., Inc.