White-Rodgers 90-T40F3 Transformer

The White-Rodgers 90-T40F3 is a 40VA Class 2 transformer engineered for reliable step-down power conversion in demanding industrial and HVACR environments. Designed with a tri-voltage primary configuration (120/208/240 VAC), this foot-mount control transformer provides a consistent 24V secondary output, making it an essential component for powering 24V control circuits, contactors, and thermostats. The 90-T40F3 features color-coded primary leads for efficient field wiring and an open construction design that promotes thermal dissipation. As a UL 1585 recognized component with a Class B insulation rating (130°C), it meets rigorous safety standards for energy-limiting performance. This 24VAC HVAC transformer is built for longevity in high-duty cycle applications where electrical isolation and voltage stability are non-negotiable for system uptime.

Key Benefits

• Tri-Voltage Versatility: Supports 120V, 208V, and 240V primary inputs, reducing the need for multiple SKUs on the service truck.
• Rugged Class B Insulation: Rated for up to 130°C to withstand the high ambient temperatures common in mechanical rooms and rooftop units.
• Safety First: Inherently energy-limiting design complies with Class 2 requirements, protecting downstream low-voltage components.
• Simplified Installation: Features 12-inch color-coded pigtail leads and a standard foot-mount footprint for fast retrofits.

Common Questions What is the maximum current output for this 40VA transformer? The 90-T40F3 provides a secondary current of 1.67 Amps at 24VAC, suitable for most single-stage and multi-stage control systems. Is this transformer compatible with both 50Hz and 60Hz systems? This specific model is optimized for 60Hz operation, which is standard for North American electrical grids. Can I use this to replace a 30VA or 20VA transformer? Yes, the 40VA rating indicates its capacity; you can use a higher VA transformer to replace a lower-rated one, provided the primary and secondary voltages match.

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.