Demanding applications require expert engineering solutions. From EMI/EMC/RFI power filters to high voltage and recon mica capacitors to pulse / power transformers and various magnetic components including pulse forming networks, the most trusted names in Aerospace, Defense, Homeland Security, Medical. Industrial and Commercial markets, trust EMS/RFI.

Since 1961, when the founders of RFI focused the company’s efforts on EMI/RFI filter products, they have diversified their product offerings to expand into new market segments with continuous innovation of new product development. In addition, this has been accomplished through the acquisition of respected product lines such as Del Electronics capacitors, Filtron, Stanley and Sprague.

In August 2012, RFI was acquired by Ultra Electronics EMS.  Ultra Electronics is an internationally successful defense, security, transport and energy company with a long, consistent track record of development and growth. Ultra businesses constantly innovate to create solutions to customer requirements that are different from and better than those of the Group's competitors. The Group has about one hundred and eighty distinct market or technology niches within its twenty-nine businesses.

EMS/RFI is an ISO 9001:2000 certified company, with over 60,000 square feet of space devoted to research and development, design, manufacturing and quality assurance.

Within the facility, they have the following capabilities: Corona testing for measuring partial voltage discharge, CAD/CAM, capacitor winding/coil winding, numerically controlled sheet metal fabrication and high-vacuum impregnation for coils, resins and epoxies. In addition, their facility allows them to perform MIL-STD-461 Tempest Testing in shielded rooms.

EMS/RFI has a client base of thousands of satisfied customers and a data base of over 100,000 designs established during the past 47 years. EMS/RFI has earned its reputation as the quality and performance leader in the EMI noise suppression and high voltage industries.