QuickLinks -- Click here to rapidly navigate through this document

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

        We consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 12, 2020, relating to the financial statements of Amphenol Corporation, and the effectiveness of Amphenol Corporation's internal control over financial reporting, appearing in the Annual Report on Form 10-K of Amphenol Corporation for the year ended December 31, 2019. We also consent to the reference to us under the heading "Experts" in such Registration Statement.

/s/ Deloitte & Touche LLP

Hartford, Connecticut

March 16, 2020

QuickLinks

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM