Exhibit 4.3


 


Form of Note


 


THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING
OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITARY OR A NOMINEE OF THE DEPOSITARY. THIS NOTE
IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED
CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY,
BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE
TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH A SUCCESSOR DEPOSITARY.


 


UNLESS THIS CERTIFICATE IS PRESENTED BY
AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR ITS AGENT FOR
REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER
NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT IS TO BE MADE TO CEDE &
CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.


 


CUSIP: 032095 AJ0


ISIN:
US032095AJ08


 


	No. R-[●]	 	$[●]




 


AMPHENOL CORPORATION


2.800% SENIOR NOTES DUE 2030


 


Amphenol Corporation,
a Delaware corporation (the “Company,” which term includes any successor corporation under the Indenture hereinafter
referred to), for value received, hereby promises to pay to CEDE & CO., as nominee for the Depositary, or its registered assigns,
the principal sum of [●] DOLLARS ($[●]), on February 15, 2030 (such date is hereinafter referred to as the “Stated
Maturity”), and to pay interest on said principal sum, from September 10, 2019 or from the next most recent date to which
interest has been paid or duly provided for, semi-annually in arrears, on February 15 and August 15 of each year (each such date,
an “Interest Payment Date”), commencing on February 15, 2020, at the rate of 2.800% per annum until the principal hereof
shall have been paid or duly made available for payment and, to the extent permitted by law, to pay interest on any overdue principal
and premium, if any, and on any overdue installment of interest from time to time on demand at the rate borne by the Notes.


 



    


     


    




 


The interest so payable
shall be paid to the persons in whose name the Notes are registered at the close of business on February 1 and August 1 (the “Interest
Record Dates”) (whether or not a Business Day) immediately preceding such February 15 or August 15, respectively.


 


The amount of interest
payable on any Interest Payment Date shall be computed on the basis of a 360-day year consisting of twelve 30-day months. In the
event that any Interest Payment Date, any redemption date or the Stated Maturity falls on a day that is not a Business Day, the
required payment of principal, premium, if any, and interest will be made on the next succeeding Business Day as if made on the
date that payment was due and no interest will accrue on the amount so payable for the period from and after such Interest Payment
Date, such redemption date or Stated Maturity, as the case may be, to the date of that payment on that next succeeding Business
Day.


 


As used herein, the
term “Depository” shall mean The Depository Trust Company, New York, New York, another clearing agency or any successor
registered under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or other applicable statute or
regulation, which in each case, shall be designated by the Company pursuant to the Indenture.


 


If the Company defaults
in a payment of interest on the Notes, it shall pay the defaulted interest, plus, to the extent permitted by law, any interest
payable on the defaulted interest, to the Persons who are Holders of the Notes on a subsequent special record date. The Company
shall fix the record date and payment date. At least ten days before the record date, the Company shall mail to the Trustee and
to each Holder of the Notes a notice that states the record date, the payment date and the amount of interest to be paid. The Company
may pay defaulted interest in any other lawful manner.


 


The place where: (i)
principal of and premium, if any, and interest on the Notes shall be payable, (ii) the Notes may be surrendered for registration
of transfer or exchange and (iii) notices and demands to or upon the Company in respect of the Notes and the Indenture may be served,
shall be at the Company’s office or agency in Pittsburgh, Pennsylvania (which initially shall be the corporate trust office
of the Trustee at: BNY Mellon Corporate Trust 500 Ross Street, 12th Floor, Pittsburgh, PA 15262), provided that, at
the Company’s option, payment of interest may be made by check mailed to the registered Holders of the Notes at their registered
addresses.


 


Notwithstanding the
foregoing, as long as this Note is represented by a Global Note, payments of principal of, premium, if any, and interest on this
Note will be made by wire transfer of immediately available funds to the Depositary or its nominee as the initial holder of this
Note.


 


REFERENCE IS HEREBY
MADE TO THE FURTHER PROVISIONS OF THIS NOTE SET FORTH ON THE FOLLOWING PAGES HEREOF, WHICH FURTHER PROVISIONS SHALL, FOR ALL PURPOSES,
HAVE THE SAME EFFECT AS IF SET FORTH AT THIS PLACE.


 


Unless the certificate
of authentication hereon has been executed by the Trustee by manual signature, this Note shall not be entitled to any benefit under
the Indenture or be valid or obligatory for any purpose.


 






    


     


    

 


IN WITNESS WHEREOF,
the Company has caused this instrument to be duly executed under its corporate seal.


 


Dated: September 10, 2019


 


	 	AMPHENOL CORPORATION
	 	 
	 	By:	 
	 	 	Name: Craig A. Lampo
	 	 	Title: Senior Vice President and Chief Financial Officer







 


	Attest:	 
	 	 
	 	 
	Name: Lance D'Amico	 
	Title: Senior Vice President, Secretary and General Counsel	 




  






    


     


    

 


CERTIFICATE OF AUTHENTICATION


 


This Global Note
is one of the Securities of the series designated therein referred to in the within-mentioned Indenture.


 


	Dated: September 10, 2019	THE BANK OF NEW YORK MELLON, 

   as Trustee
	 	 
	 	By:	 
	 	 	Authorized Officer




 


 






    


     


    

 


(REVERSE OF NOTE)


 


AMPHENOL CORPORATION


2.800% SENIOR NOTES DUE 2030


 


This Global Note designated
on the face hereof as 2.800% Senior Notes due 2030 (the “Notes”) is a duly authorized issue of securities of the Company
issued and issuable in one or more series under an indenture, dated as of November 5, 2009 (the “Base Indenture”),
between the Company and The Bank of New York Mellon, as trustee (the “Trustee,” which term includes any successor trustee
under such indenture), to such indenture, as supplemented by an Officers’ Certificate dated as of September 10, 2019 establishing
the terms of the Notes (the “Officers’ Certificate,” and together with the Base Indenture, the “Indenture”),
reference is hereby made for a statement of the respective rights, limitation of rights, duties and immunities thereunder of the
Company, the Trustee and the holders of the securities issued thereunder and of the terms upon which said securities are, and are
to be, authenticated and delivered. Capitalized terms used herein for which no definition is provided herein shall have the meanings
set forth in the Indenture.


 


The Notes are not subject to a mandatory or optional
sinking fund requirement.


 


The Notes shall be
redeemable, at the Company’s option, in whole or in part, at any time or from time to time at the redemption prices described
in the Indenture.


 


If a Change of Control
Repurchase Event (as defined in the Indenture) occurs, unless the Company has exercised its right to redeem all of the Notes as
described above, each Holder of the Notes shall have the right to require the Company to repurchase all or any part (equal to $2,000
and integral multiples of $1,000 in excess thereof) of such Holder’s Notes pursuant to the offer described in the Indenture,
at a purchase price in cash equal to 101% of the principal amount of the Notes, plus accrued and unpaid interest, if any, to, but
not including, the date of repurchase (subject to the right of Holders of record on the relevant Interest Record Date to receive
interest due on the relevant Interest Payment Date).


 


If an Event of Default
(as defined in the Indenture) with respect to the Notes of this Series occurs and is continuing, the principal of the Notes of
this Series may be declared due and payable in the manner and with the effect provided in the Indenture.


 


The Indenture permits,
with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company
and the rights of the Holders of the Securities of each Series to be affected under the Indenture at any time by the Company and
the Trustee with the consent of the Holders of a majority in principal amount of the Securities at the time outstanding of each
Series to be affected. Without the consent of any Holder of Securities, the Indenture or the Securities may be amended to cure,
correct or supplement any ambiguity, omission, defect or inconsistency as to the Securities of such Series or to make any change
that does not adversely affect the rights of any Holder of the Securities of such Series in any material respect. The Indenture
also contains provisions permitting the Holders of specified percentages in principal amount of the Securities of each Series at
the time outstanding, on behalf of the Holders of all Securities of such Series, to waive compliance by the Company with certain
provisions of the Indenture and certain past defaults under the Indenture and their consequences. Until such waiver becomes effective,
a consent to it by a Holder of this Note is a continuing consent by the Holder and every subsequent Holder of this Note or portion
of this Note that evidences the same debt as the consenting Holder’s Note, even if notation of the consent is not made on
this Note. However, any such Holder or subsequent Holder may revoke the consent as to such Holder’s Note or portion of this
Note if the Trustee receives the notice of revocation before the date of the waiver becomes effective. Any amendment or waiver
once effective shall bind every Holder of each Series affected by such amendment or waiver, subject to certain exceptions provided
for in the Indenture.


 






    


     


    

 


Every amendment to
the Indenture or the Securities of one or more Series shall be set forth in a Supplemental Indenture that complies with the TIA
as then in effect.


 


No reference herein
to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of and interest on this Note at the times and place and at the rate and in the
currency herein prescribed.


 


A Holder shall register
the transfer of or exchange Notes in accordance with the Indenture. The Company may require a Holder, among other things, to furnish
appropriate endorsements and transfer documents and to pay certain transfer taxes or similar governmental charges payable in connection
therewith as permitted by the Indenture. Neither the Company nor the Registrar shall be required (a) to issue, register the transfer
of, or exchange Notes of any Series for the period beginning at the opening of business fifteen days immediately preceding the
mailing of a notice of redemption of Notes of such Series selected for redemption and ending at the close of business on the day
of such mailing, or (b) to register the transfer of or exchange Notes of any Series selected, called or being called for redemption
as a whole or the portion being redeemed of any such Securities selected, called or being called for redemption in part.


 


The Company may be
discharged from its obligations under the Notes and under the Indenture with respect to the Notes except for certain provisions
thereof, and may be discharged from obligations to comply with certain covenants contained in the Notes and in the Indenture with
respect to the Notes, in each case upon satisfaction of certain conditions specified in the Indenture.


 


A director, officer,
employee or stockholder, as such, of the Company shall not have any liability for any obligations of the Company under this Note
or the Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. Each Holder by accepting
the Note waives and releases all such liability. The waiver and release are part of the consideration for the issue of the Note.


 


The registered Holder of this Note shall
be treated as the owner of it for all purposes.


 


If funds for the payment
of principal or interest remain unclaimed for two years, the Trustee and the Paying Agent will repay the funds to the Company at
its written request. After that, all liability of the Trustee and such Paying Agent with respect to such funds shall cease.


 


The Trustee shall act
as the Registrar, Paying Agent and Service Agent (as defined in the Indenture) for the Notes. The Notes shall be issued in denominations
of $2,000 and integral multiples of $1,000 in excess thereof. The Notes shall be issued only in registered form without coupons.
In the event of a declaration of acceleration of the maturity of the Notes pursuant to the Indenture, 100% of the principal amount
of the Notes shall be payable. The Notes shall be issued in United States dollars and principal of and premium, if any, and interest
on the Notes shall be paid in United States dollars. The Notes shall be unsecured debt securities of the Company. The Notes shall
not be convertible to any other securities of the Company. The Indenture and this Note shall be governed by and construed in accordance
with the laws of the State of New York.


 


In order
to comply with applicable tax laws (inclusive of rules, regulations and interpretations promulgated by competent
authorities) related to the Notes in effect from time to time (“Applicable Law”) that a foreign financial
institution, issuer, trustee, paying agent or other party is or has agreed to be subject to, the Company agrees (i)
upon written request of the Trustee, to provide to the Trustee, to the extent reasonably available to the Company, sufficient
information about the parties and/or transactions (including any modification to the terms of such transactions) so the
Trustee can determine whether it has tax related obligations under Applicable Law and (ii) that the Trustee shall be entitled
to make any withholding or deduction from payments to the extent necessary to comply with Applicable Law for which the
Trustee shall not have any liability.


 






    


     


    

 


ASSIGNMENT
FORM


To assign this Note, fill in
the form below:


 


(I) or (we) assign and transfer this Note to:


 


	 
	(Insert assignee’s legal name)
	 
	 
	(Insert assignee’s soc. sec. or tax I.D. no.)
	 
	 
	 
	 
	 
	(Print or type assignee’s name, address and Zip Code)
	 
	and irrevocably appoint	 
	 
	to transfer this Note on the books of the Company. The Agent may substitute another to act for him.




 


	Date:	
	 	Your Signature:	 
	 	 	(Sign exactly as your name appears on the face of this Note)




 


Signature Guarantee*:


 


		*	Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor
acceptable to the Trustee).



 






    


     


    

 


OPTION
OF HOLDER TO ELECT
PURCHASE


 


If you want
to elect to have this Note purchased by the Company pursuant to the provisions hereof, check the box:  ̈


 


If you want to elect to have only
part of the Note purchased by the Company pursuant to the provisions hereof, state the amount you elect to have purchased:
$______________________


 


	Date:	
	 	Your Signature:	 
	 	 	(Sign exactly as your name appears on the face of this Note)
	 	 	 
	 	Tax Identification No.:	 







 


 


Signature Guarantee*: _______________________________


 


		*	Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor
acceptable to the Trustee).