Functional Devices, Inc.

Functional Devices, Inc., proudly based in the United States, has been designing and manufacturing high-quality electronic devices since 1969. Our mission is to enhance lives in buildings and beyond. We achieve this by delivering reliable, high-performance products for the building automation industry. Our extensive product lineup includes RIB® (Relay in a Box®) relays, current sensors, power supplies, transformers, lighting controls, and more. Every product is rigorously tested—resulting in an industry-leading reliability rate, with fewer than 1 in 16,000 products experiencing a failure in the field. To further ensure customer confidence and peace of mind, we now offer a newly launched, industry-leading 10-year warranty on our products—reinforcing our commitment to quality and longevity. Simply put, when you choose Functional Devices, you're choosing unmatched reliability in every box.