Innovative, Reliable Electrical Components Your Trusted Partner for RIB® Relays and Building Automation Controls

Functional Devices, Inc. is proud to design and manufacture top-quality RIB® relays, current sensors, power supplies, and building automation solutions — all made in the USA. Whether you need off-the-shelf components or custom solutions, our engineering team is ready to help.

  • Industry-Leading Quality & Innovation
  • Made in the USA for Reliability & Fast Lead Times
  • Expert Engineering Support to Solve Complex Problems
  • RIB® Components for HVAC, Lighting Controls, Access Systems & More
  • Trusted by OEMs, Distributors & Contractors Nationwide
Get in Touch — Let’s Build Your Perfect Solution

What We Offer

Our Relay in a Box® product line sets the industry standard through our unwavering commitment to core values.
Innovation

Continuous improvement to bring time-saving, money-saving ideas to market.

Adaptability

Versatile products designed to solve multiple problems and adapt to changing needs.

Collaboration

Commitment to working with customers to continually enhance our products and services.

Quality

Rigorous testing of products to ensure reliability, quality, and zero failures in the field.

About Functional Devices, Inc.

We have been designing and manufacturing high-quality electronic components in the USA since 1969. Our mission is simple: to enhance lives in buildings and beyond by delivering reliable, innovative solutions for the building automation and lighting control industries.