
Resideo AT140B1016 Transformer
The Resideo AT140B1016 is a heavy-duty, foot-mounted HVAC control transformer engineered to provide steady low-voltage power for demanding residential and light commercial applications. This unit efficiently steps down 120V primary power to a 24V secondary output, making it a critical component for powering thermostats, gas valves, relays, and integrated furnace kernels. Rated at 40 VA, it offers more than enough overhead for modern multi-stage systems and high-draw control circuits. The foot-mount design ensures a rigid installation within air handlers, boiler jacket cabinets, and furnace vestibules. Built for continuous duty, this Class 2 transformer is the industry standard for contractors performing field retrofits or replacing failed OEM control transformers. Its color-coded lead wires simplify identification during wire-ups, ensuring your 24 volt transformer wiring is fast and accurate on the job site.
Key Benefits:- Universal Application: Compatible with most 120V residential furnaces, air handlers, and boiler control systems.
- High-Capacity 40 VA Rating: Provides ample power for complex control strings and high-impedance loads.
- Rugged Foot-Mounting: Designed for internal equipment mounting to resist vibration and ensure long-term stability.
- Class 2 Certified: Meets safety standards for energy-limited circuits in HVACR environments.
- Reliable Step-Down Performance: Maintains consistent voltage regulation to prevent control component chattering.
- How do I wire the Resideo AT140B1016? The primary side connects to the 120V line voltage, while the secondary side provides the 24V output for your R and C terminals. Always verify phasing if using multiple transformers.
- Can this replace a transformer with a lower VA rating? Yes, you can typically use a 40 VA transformer to replace a 20 VA or 30 VA unit, provided the input and output voltages match.
- What is the difference between foot-mount and plate-mount? This foot-mounted model is designed to be screwed directly to a flat surface inside the unit, rather than mounting over a 4x4 electrical box.
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.
Original: $18.77
-65%$18.77
$6.57Resideo AT140B1016 Transformer
The Resideo AT140B1016 is a heavy-duty, foot-mounted HVAC control transformer engineered to provide steady low-voltage power for demanding residential and light commercial applications. This unit efficiently steps down 120V primary power to a 24V secondary output, making it a critical component for powering thermostats, gas valves, relays, and integrated furnace kernels. Rated at 40 VA, it offers more than enough overhead for modern multi-stage systems and high-draw control circuits. The foot-mount design ensures a rigid installation within air handlers, boiler jacket cabinets, and furnace vestibules. Built for continuous duty, this Class 2 transformer is the industry standard for contractors performing field retrofits or replacing failed OEM control transformers. Its color-coded lead wires simplify identification during wire-ups, ensuring your 24 volt transformer wiring is fast and accurate on the job site.
Key Benefits:- Universal Application: Compatible with most 120V residential furnaces, air handlers, and boiler control systems.
- High-Capacity 40 VA Rating: Provides ample power for complex control strings and high-impedance loads.
- Rugged Foot-Mounting: Designed for internal equipment mounting to resist vibration and ensure long-term stability.
- Class 2 Certified: Meets safety standards for energy-limited circuits in HVACR environments.
- Reliable Step-Down Performance: Maintains consistent voltage regulation to prevent control component chattering.
- How do I wire the Resideo AT140B1016? The primary side connects to the 120V line voltage, while the secondary side provides the 24V output for your R and C terminals. Always verify phasing if using multiple transformers.
- Can this replace a transformer with a lower VA rating? Yes, you can typically use a 40 VA transformer to replace a 20 VA or 30 VA unit, provided the input and output voltages match.
- What is the difference between foot-mount and plate-mount? This foot-mounted model is designed to be screwed directly to a flat surface inside the unit, rather than mounting over a 4x4 electrical box.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Resideo AT140B1016 is a heavy-duty, foot-mounted HVAC control transformer engineered to provide steady low-voltage power for demanding residential and light commercial applications. This unit efficiently steps down 120V primary power to a 24V secondary output, making it a critical component for powering thermostats, gas valves, relays, and integrated furnace kernels. Rated at 40 VA, it offers more than enough overhead for modern multi-stage systems and high-draw control circuits. The foot-mount design ensures a rigid installation within air handlers, boiler jacket cabinets, and furnace vestibules. Built for continuous duty, this Class 2 transformer is the industry standard for contractors performing field retrofits or replacing failed OEM control transformers. Its color-coded lead wires simplify identification during wire-ups, ensuring your 24 volt transformer wiring is fast and accurate on the job site.
Key Benefits:- Universal Application: Compatible with most 120V residential furnaces, air handlers, and boiler control systems.
- High-Capacity 40 VA Rating: Provides ample power for complex control strings and high-impedance loads.
- Rugged Foot-Mounting: Designed for internal equipment mounting to resist vibration and ensure long-term stability.
- Class 2 Certified: Meets safety standards for energy-limited circuits in HVACR environments.
- Reliable Step-Down Performance: Maintains consistent voltage regulation to prevent control component chattering.
- How do I wire the Resideo AT140B1016? The primary side connects to the 120V line voltage, while the secondary side provides the 24V output for your R and C terminals. Always verify phasing if using multiple transformers.
- Can this replace a transformer with a lower VA rating? Yes, you can typically use a 40 VA transformer to replace a 20 VA or 30 VA unit, provided the input and output voltages match.
- What is the difference between foot-mount and plate-mount? This foot-mounted model is designed to be screwed directly to a flat surface inside the unit, rather than mounting over a 4x4 electrical box.
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.












