Functional Devices

Browse Functional Devices replacement parts at Furnace Part Source, including available remote current sensors, relay tracks, enclosed power relays, power supplies, interface boards, transformers, and related HVAC control components. Match the exact part number, voltage, VA rating, amperage or load rating, relay configuration, enclosure type, equipment application, and product details before ordering to help confirm the correct replacement.

Functional Devices HVAC Control Parts and Power Components

Functional Devices parts are commonly used in HVAC control, building automation, relay, sensing, and low-voltage power applications. This brand page may include replacement or service components such as RIB relays, enclosed relays, relay mounting tracks, remote current sensors, interface boards, transformers, and power supplies for compatible systems. Because many of these parts are selected by electrical rating and control configuration, the exact model number is the best starting point when comparing products.

Choosing the Right Functional Devices Replacement Part

Before selecting a Functional Devices part, compare the product listing with the existing component label, wiring diagram, control panel documentation, or equipment records. Important details may include input voltage, output voltage, VA rating, amperage rating, contact rating, relay type, coil voltage, enclosure style, mounting method, terminal configuration, and whether the part is intended for a specific control or power-supply application. For products such as PSH300AB10-LVC, PSH300A-LVC, PSC100AB10, PSH2RB10, TR40VA001, TR40VA015, TR50VA005, TR50VA015, RIBU2C, RIBTD2401B, RIB2402B2G, and related Functional Devices models, confirm the full part number before purchase.

Relays, Power Supplies, Sensors, and Interface Boards

Functional Devices components can support a range of control-panel and HVAC system needs. Power supplies should be checked against voltage, VA capacity, load requirements, and enclosure or mounting style. Relay products should be reviewed for coil voltage, contact rating, relay action, and wiring requirements. Current sensors and interface boards should be matched to the control sequence, signal type, and equipment documentation. Small differences in ratings or configuration can affect whether a component is suitable for the intended system.

Confirm Compatibility Before Ordering

Use the exact Functional Devices part number whenever possible. If the original label is missing or difficult to read, compare the equipment documentation, control panel schematic, voltage requirements, terminal layout, and application details before choosing a replacement. For electrical control components, installation and replacement should follow the equipment documentation and applicable service requirements.