Functional Devices RIB TR50VA018 Transformer

The Functional Devices RIB TR50VA018 is a versatile 50VA multi-tap transformer engineered for reliable power stepping in building automation systems and HVACR control circuits. Designed to handle diverse primary voltages including 480/277/240/208/120 VAC, this unit converts line voltage to a stabilized 24 VAC output. Also recognized as the AE-249 transformer, it features a heavy-duty foot mount configuration with a 1/2" NPT hub, allowing for secure installation on standard electrical boxes. This Class 2 rated component is ideal for powering 24V thermostats, relays, and programmable controllers. The RIB TR50VA018 utilizes high-quality windings to ensure minimal voltage drop under load and maintains thermal stability during continuous operation. For technicians in the field, this model serves as a universal replacement, reducing the need to stock multiple single-tap transformers. Integration is straightforward via color-coded lead wires, ensuring pin-point accuracy for 24V control transformer wiring in complex multi-voltage environments.

• Multi-Tap Primary: Supports 120V through 480V inputs, making it a universal HVAC transformer for commercial and industrial sites.
• 50VA Power Rating: Provides ample current for multiple 24V loads without the risk of nuisance tripping or overheating.
• Class 2 Certified: Meets strict safety standards for power-limited circuits, simplifying code compliance during inspection.
• Interchangeable Design: Fully compatible with AE-249 specifications, streamlining the swap-out process for existing Functional Devices installations.
• Durable Foot Mount: Includes a threaded hub for flexible mounting options inside or outside of an enclosure.

Can the TR50VA018 be used in 480V three-phase systems?
Yes, by utilizing the 480V primary lead and common, this 50VA multi-tap transformer effectively steps down high-voltage industrial power to 24 VAC for local control circuits.

What is the difference between the TR50VA018 and the AE-249?
There is no functional difference; the TR50VA018 is identical to AE-249 and can be used interchangeably in all spec-matched applications.

How do I handle unused primary leads?
Always cap each unused primary lead individually with a wire nut to prevent short circuits, as these leads will be energized when the transformer is powered.

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.