Functional Devices-RIB TR20VA001 Transformer

The Functional Devices RIB TR20VA001 is a commercial-grade 120V to 24V step-down transformer engineered for reliable power distribution in HVACR control circuits. Providing a 20VA power rating, this unit is designed for continuous duty applications where stability is critical for low-voltage controllers and relays. The TR20VA001 features inherently limited overcurrent protection, eliminating the need for external fusing and reducing potential failure points in the field. This class 2 transformer is built with a versatile mounting configuration, including both a foot mount and a single threaded hub for secure attachment to electrical knockouts. The primary leads are 8 inches long with 1/2-inch stripped ends, while the secondary side provides standard 18 AWG wiring for easy integration into existing terminal blocks. This 120Vac primary transformer is a staple for technicians requiring a durable, code-compliant solution for 24-volt control systems in demanding environments.

• Dual Mounting Versatility: Equipped with both a foot mount and a 1/2 inch NPT hub for flexible installation in junction boxes or equipment panels.
• Integrated Circuit Protection: The inherently limited design prevents damage from short circuits without requiring manual fuse replacement.
• Compact Footprint: Designed to fit within tight control cabinets while maintaining thermal efficiency during high-load periods.
• Standardized Voltage: Provides a consistent 24Vac secondary output from a 120Vac source, ensuring compatibility with most thermostat and zone valve actuators.

What is the maximum current draw supported by this 20VA transformer?
At a 24Vac output, this 20VA unit provides approximately 0.83 Amps. It is crucial to calculate the total VA draw of your connected relays and controllers to ensure it does not exceed this threshold.

Can the TR20VA001 be mounted outside of an electrical enclosure?
While the unit features a durable construction, it is intended for installation within a protected enclosure or attached via the threaded hub to a code-compliant junction box.

Is this transformer suitable for powering smart thermostats?
Yes, provided the total power consumption of the thermostat and any associated equipment stays within the 20VA limit, this transformer provides the stable 24V AC power required by modern digital controls.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.