Functional Devices TR40VA003 Transformer

The Functional Devices TR40VA003 is a professional-grade 24V to 24V isolation transformer designed for reliable power distribution in HVAC control systems and building automation. This 40VA Class 2 transformer features inherently limited overcurrent protection, eliminating the need for external fusing while maintaining strict UL listed safety standards for the U.S. and Canada. Engineered for versatility, the TR40VA003 includes both foot mount and a single threaded hub mount, allowing for secure installation directly onto electrical knockouts or within control panels. This unit is built to handle the continuous duty requirements of powering thermostats, relays, and low-voltage automation controllers. Its 24VAC primary and secondary configuration makes it a specific solution for isolating control circuits or stepping down power in specialized commercial HVACR environments where consistent voltage stability is critical for sensitive electronics.

• Versatile Mounting: Integrated single threaded hub and foot mount tabs provide flexible installation options for various enclosure types.
• Safety Compliance: Class 2 rated and UL listed, ensuring the unit meets rigorous electrical codes for low-voltage applications.
• Circuit Protection: Features inherent current limiting to protect downstream components from short circuits without requiring manual resets.
• Stable Power: Delivers a consistent 40VA power rating, ideal for maintaining steady operation in complex 24V control loops.

Can the TR40VA003 be used as a step-down transformer from 120V?
No, this specific model features a 24VAC primary voltage. It is designed for 1:1 isolation or 24V distribution. Always verify your input voltage before installation.

What does 'Inherently Limited' mean for this transformer?
It means the TR40VA003 is designed so that the maximum output current is limited by the winding impedance. This protects the HVAC transformer from overheating during an overload or short circuit.

Is this transformer suitable for outdoor use?
The unit should be mounted within a NEMA-rated enclosure or a protected indoor environment, as it is designed for building automation and control panel integration.

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.