functional devices, inc. has been manufacturing quality electronic devices in the united states of america since 1969. current product offerings include prepackaged relays, current sensors, power control, enclosures, power supplies, transformers, and accessories. functional devices has established itself as a leader in the hvac, building controls, and energy management industries.
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rib ,relay in a box, functional devices, prepackaged relays, current sensors, enclosures, power supplies, transformers, power control, russiaville, made in usa