Functional Devices TR50VA002 Transformer

The Functional Devices TR50VA002 Transformer is a heavy-duty 120Vac to 24Vac step-down transformer engineered for reliable power delivery in building automation and HVACR control circuits. Providing a robust 50VA power rating, this Class 2 transformer is ideal for driving multiple relays, sensors, and digital I/O modules where stable 24-volt power is critical. For enhanced circuit protection, the unit features an integrated 3-amp fuse to safeguard downstream components from overcurrent conditions.

Designed for versatile field installation, the TR50VA002 utilizes a Foot and Dual Threaded Hub Mount configuration, allowing for secure attachment to electrical boxes via the 0.500-inch NPT hubs or direct surface mounting. The split-bobbin construction ensures superior isolation between primary and secondary windings, while the color-coded 8-inch wire leads simplify phasing and integration with existing wiring harnesses. With an operating temperature range of -30°F to 140°F, this RIB series transformer maintains performance in demanding mechanical room environments.

Key Benefits

• Dual Hub Mounting: Two 1/2-inch threaded hubs provided for flexible conduit attachment and internal/external enclosure mounting.
• Integrated Overcurrent Protection: A factory-installed 3-amp fuse prevents board damage during short circuits or load spikes.
• High Isolation Design: Split-bobbin construction enhances dielectric strength and reduces the risk of electrical leakage.
• Broad Compatibility: This 120V to 24V control transformer is a standard replacement for many commercial air handlers and BAS controllers.

Common Questions

Is the fuse on the TR50VA002 field replaceable?
No, the 3-amp fuse is integrated into the internal winding protection and is not intended for field replacement; if the fuse blows, the transformer should be inspected for a downstream short and replaced to ensure system integrity.

Can I use this 50VA transformer to replace a 40VA model?
Yes, you can safely replace a lower VA-rated transformer with a 50VA unit, provided the primary and secondary voltages match (120V to 24V), as it provides additional headroom for the control circuit.

Does this unit support both 50Hz and 60Hz frequencies?
The TR50VA002 is rated for 50/60 Hz operation, making it compatible with various power standards in North American commercial and industrial applications.

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.