Functional Devices RIB TR50VA005 Transformer

The Functional Devices RIB TR50VA005 is a professional-grade 50VA control transformer engineered for reliable 120V to 24V power conversion in building automation and HVAC/R control systems. This heavy-duty unit features a split-bobbin construction to provide superior isolation between primary and secondary windings, effectively protecting sensitive downstream Class 2 electronics. For simplified installation, the residential and commercial sub-panel ready design includes a single threaded 1/2" NPT hub for direct knockout mounting and foot-mount capabilities for standard internal panel placement.

Designed for field durability, the TR50VA005 includes an integrated circuit breaker on the secondary side, allowing for a manual reset and providing essential over-current protection without the need for glass fuses. The unit is UL Listed and operates across a wide temperature range from -30 to 140° F, ensuring performance in demanding mechanical rooms or outdoor enclosures. With color-coded pigtail leads and a high 100,000-hour MTBF, this transformer is the go-to choice for contractors requiring a stable 24VAC power supply for relays, actuators, and digital controllers.

• Circuit Breaker Protected: Features an integral manual reset breaker to safeguard the 24V secondary circuit from shorts and overloads.
• Versatile Mounting: Equipped with a 1/2 inch NPT hub and a standard foot base, permitting easy installation on junction boxes or flat surfaces.
• High Isolated Output: Delivering a full 50VA rating, it provides ample power for multiple 24V control loads, sensors, and RIB relays.
• Industrial Durability: Rated for severe operating temperatures (-30°F to 140°F) and built with a split-bobbin design for enhanced safety.

Can I install this transformer in an outdoor enclosure?
Yes, as long as the enclosure is NEMA-rated for the environment. The unit's operating range allows it to function in unconditioned spaces as low as -30°F.

Does this unit require a separate fuse for Class 2 compliance?
No, this model features a built-in manual reset circuit breaker, which provides the necessary over-current protection for its 50VA capacity.

What is the primary difference between the hub and foot mount options?
The hub allows you to thread the transformer directly into a 1/2" knockout on a junction box, while the foot mount is used for screwing the unit onto a mounting plate or transformer tray.

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.