Custom Interconnect is a UK electronics manufacturer combining PCB assembly (PCBA) with advanced semiconductor packaging (OSAT), from wire bonding, die bonding, and flip chip to complete box build.

Founded in 1987, the company operates 90,000 sq ft across two Andover sites, including a dedicated 15,000 sq ft ISO 7 cleanroom, and employs over 220 people. Its OSAT facility, opened in 2023, is the UK's largest of its kind.

Custom Interconnect supports customers in defence, aerospace, medical, communications, automotive, and industrial sectors, and holds ISO 9001:2015, AS9100D, and ISO 13485:2016 accreditations.

Custom Interconnect is part of the Connexion Technologies group, alongside Exception PCB and OMR Italia.