Functional Devices TR40VA015 Transformer

The Functional Devices TR40VA015 is a professional-grade 40VA control transformer designed for heavy-duty HVACR and commercial building automation tasks. This multi-tap transformer features a flexible primary side, allowing for 120/208/240 VAC input to meet various site requirements with a single SKU. On the secondary side, it delivers a stable 24 VAC output, making it the standard choice for powering 24V thermostats, RIB relays, and advanced HVAC control systems.

For the field technician, the split-bobbin construction ensures robust electrical isolation, while the integrated thermal fuse over-current protection prevents downstream damage from secondary shorts. This unit is built for versatile installation, featuring both a foot mount and a single threaded 1/2 inch NPT hub for secure attachment to 4x4 junction boxes or equipment panels. With 8-inch color-coded leads and an included TRMP44K0 mounting plate, this Class 2 transformer simplifies replacement in rooftop units, air handlers, and boiler control circuits.

• Multi-Tap Versatility: Handles 120V, 208V, or 240V primary voltages, reducing the need to carry multiple spare parts on the truck.
• Safe Power Distribution: UL Listed Class 2 rating ensures compatibility with low-voltage wiring codes and power-limited circuits.
• Durable Construction: Features a high MTBF of 100,000 hours and a broad operating range of -30°F to 140°F for reliable performance in demanding mechanical rooms.
• Easy Mounting: Dual mounting options (foot and hub) and included hardware provide flexibility for tight spaces and standard enclosures.

• What is the maximum load for this transformer? This unit is rated for 40VA. To prevent overheating, ensure your total load, including inrush current for contactors, does not exceed this capacity.
• Is the thermal fuse resettable? No, the TR40VA015 uses a non-replaceable thermal fuse for maximum safety. If the fuse blows due to a thermal event or short, the transformer must be replaced.
• Can I use this for 277V or 480V applications? No, this specific model is limited to a maximum primary voltage of 240V. For higher voltage applications, check the TR50 or TR75 series multi-tap variations.

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.