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JOINDER AGREEMENT THIS JOINDER AGREEMENT (the “Agreement”), dated as of October
22, 2018, is by and between (i) each of LITTELFUSE INTERNATIONAL HOLDING, LLC, a
Delaware limited liability company, LITTELFUSE HOLDING, LLC, a Delaware limited
liability company, and MONOLITH SEMICONDUCTOR INC., a Delaware corporation
(each, a “Subsidiary”), and (ii) BANK OF AMERICA, N.A., in its capacity as Agent
under that certain Credit Agreement (as it may be amended, modified, restated or
supplemented from time to time, the “Credit Agreement”), dated as of March 4,
2016, by and among Littelfuse, Inc., a Delaware corporation, the Designated
Borrowers, the Guarantors, the Lenders, and Bank of America, N.A., as Agent. All
of the defined terms in the Credit Agreement are incorporated herein by
reference. The Loan Parties are required by Section 6.12 of the Credit Agreement
to cause each Subsidiary to become a “Guarantor”. Accordingly, each Subsidiary
hereby agrees as follows with the Agent, for the benefit of the Lenders: 1. The
Subsidiary hereby acknowledges, agrees and confirms that, by its execution of
this Agreement, the Subsidiary will be deemed to be a party to the Credit
Agreement and a “Guarantor” for all purposes of the Credit Agreement, and shall
have all of the obligations of a Guarantor thereunder as if it had executed the
Credit Agreement. The Subsidiary hereby ratifies, as of the date hereof, and
agrees to be bound by, all of the terms, provisions and conditions applicable to
the Guarantors contained in the Credit Agreement. Without limiting the
generality of the foregoing terms of this paragraph 1, the Subsidiary hereby
jointly and severally together with the other Guarantors, guarantees to each
Lender and the Agent, as provided in Article XI of the Credit Agreement, the
prompt payment of the Obligations in full when due (whether at stated maturity,
as a mandatory prepayment, by acceleration, a mandatory cash collateralization
or otherwise) strictly in accordance with the terms thereof. 2. The address of
the Subsidiary for purposes of all notices and other communications is c/o
Littelfuse, Inc., 8755 W. Higgins Road, Chicago, Illinois 60631, Attention:
Assistant Treasurer (Facsimile No. 847-512-0340). 3. The Subsidiary hereby
waives acceptance by the Agent and the Lenders of the guaranty by the Subsidiary
under Article XI of the Credit Agreement upon the execution of this Agreement by
the Subsidiary. 4. This Agreement may be executed in two or more counterparts,
each of which shall constitute an original but all of which when taken together
shall constitute one contract. 5. This Agreement shall be governed by and
construed and interpreted in accordance with the laws of the State of New York.
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IN WITNESS WHEREOF, each Subsidiary has caused this Agreement to be duly
executed by its authorized officer, and the Agent, for the benefit of the
Lenders, has caused the same to be accepted by its authorized officer, as of the
day and year first above written. LITTELFUSE INTERNATIONAL HOLDING, LLC By: /s/
Ryan K. Stafford Name: Ryan K. Stafford Title: Manager LITTELFUSE HOLDING, LLC
By: /s/ Ryan K. Stafford Name: Ryan K. Stafford Title: Manager MONOLITH
SEMICONDUCTOR INC. By: /s/ Hans Weinburger Name: Hans Weinburger Title:
Assistant Secretary Acknowledged and accepted: BANK OF AMERICA, N.A., as Agent
By:/s/ Melissa Mullis Name: Melissa Mullis Title: Assistant Vice President
JOINDER AGREEMENT

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Schedule 1 TO JOINDER AGREEMENT

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