Functional Devices, Inc. has been designing and manufacturing quality electronic devices in the United States of America since 1969. Our goal is to provide high quality products for the most reliable and economical solutions to the needs of our customers, along with world-class support from our sales and engineering experts. Current product offerings include relays, current sensors, power control, enclosures, power supplies, transformers, and accessories. Functional Devices has established itself as a leader in the HVAC, Building Controls, Energy Management, Energy Savings, Lighting Controls, and Wireless industries. Manufacturer of the famous RIBU1C; SPDT, field mount relay-in-a-box!