[6] Amphenol expanded significantly during World War II, when the company became the primary manufacturer of connectors used in military hardware, including airplanes and radios.

The company sells its products into diverse electronics markets, including military-aerospace, industrial, automotive, information technology, mobile phones, wireless infrastructure, broadband, medical, and pro audio.

AFSI employs over 100 people at its 50,000 square foot facility in the heart of the telecom corridor in Allen, just north of Dallas, Texas.

[citation needed] In 1986, Socapex, a French manufacturer of connectors and interconnect systems based in Thyez, was acquired by Amphenol.

On January 8, 2016, Amphenol finalized its deal to acquire FCI Asia Pte Ltd[16] an interconnect company specializing in the telecom, datacom and wireless communications markets.

[18] In June 2017, Amphenol acquired Wilcoxon Research (US), Piezo Technologies (US) and Piher Sensors and Controls (Spain), three Industrial Sensing businesses from the British engineering group Meggitt PLC.

[20] In December 2020, Amphenol announced it had reached an agreement to acquire MTS Systems Corporation in an acquisition completed on April 7, 2021.