
Resideo AT72D1683 Transformer
The Resideo AT72D1683 Transformer is a professional-grade solution for stepping down 120V primary voltage to a 24V secondary output, optimized for residential and light commercial HVACR control circuits. Rated at 40VA, this NEMA Type D transformer is engineered to provide stable power for 24V thermostats, gas valves, and relays. The 4"x4" plate-mounted design ensures compatibility with standard electrical boxes, while the 9-inch leadwires offer significant flexibility for wiring in tight enclosures.
As a step-down transformer, the AT72D1683 features built-in override protection and an energy-limiting design to prevent system failure under heavy load. This HVAC control transformer is built for durability, maintaining a wide operating temperature range from -20°F to 105°F. Its multi-mount versatility allows for foot, plate, or clamp mounting, meeting the rigorous standards required for NEC Class 2 installations. Use this power transformer when high efficiency and reliable voltage regulation are non-negotiable for system performance.
Key Benefits- Universal Compatibility: Seamlessly powers a wide range of 24V systems, including high-efficiency ignition systems and gas valves.
- Flexible Installation: Pre-installed 4"x4" mounting plate and 9-inch color-coded leadwires simplify field integration into junction boxes.
- Enhanced Protection: Integrated energy-limiting capability and NEMA Type D rating provide essential circuit safety without external fusing.
- Rugged Temperature Rating: Reliable performance in extreme ambient environments ranging from sub-zero to high-heat plenum spaces.
What is the primary application for the Resideo AT72D1683?
This 120V to 24V transformer is primarily used by technicians to provide low-voltage power to control circuits, thermostats, and relay coils in HVAC units.
Can this transformer be mounted outside of a junction box?
While the unit is plate-mounted for standard 4x4 squares or octagonal boxes, it can also be clamp-mounted via a knockout or foot-mounted, provided it is housed within a suitable enclosure as per NEC Class 2 requirements.
How many VA does this unit support?
The AT72D1683 is rated for a 40VA maximum load. Ensure the total load of your thermostats, valves, and components does not exceed this rating to prevent overheating.
This item is not eligible for free shipping.
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.
Resideo AT72D1683 Transformer
The Resideo AT72D1683 Transformer is a professional-grade solution for stepping down 120V primary voltage to a 24V secondary output, optimized for residential and light commercial HVACR control circuits. Rated at 40VA, this NEMA Type D transformer is engineered to provide stable power for 24V thermostats, gas valves, and relays. The 4"x4" plate-mounted design ensures compatibility with standard electrical boxes, while the 9-inch leadwires offer significant flexibility for wiring in tight enclosures.
As a step-down transformer, the AT72D1683 features built-in override protection and an energy-limiting design to prevent system failure under heavy load. This HVAC control transformer is built for durability, maintaining a wide operating temperature range from -20°F to 105°F. Its multi-mount versatility allows for foot, plate, or clamp mounting, meeting the rigorous standards required for NEC Class 2 installations. Use this power transformer when high efficiency and reliable voltage regulation are non-negotiable for system performance.
Key Benefits- Universal Compatibility: Seamlessly powers a wide range of 24V systems, including high-efficiency ignition systems and gas valves.
- Flexible Installation: Pre-installed 4"x4" mounting plate and 9-inch color-coded leadwires simplify field integration into junction boxes.
- Enhanced Protection: Integrated energy-limiting capability and NEMA Type D rating provide essential circuit safety without external fusing.
- Rugged Temperature Rating: Reliable performance in extreme ambient environments ranging from sub-zero to high-heat plenum spaces.
What is the primary application for the Resideo AT72D1683?
This 120V to 24V transformer is primarily used by technicians to provide low-voltage power to control circuits, thermostats, and relay coils in HVAC units.
Can this transformer be mounted outside of a junction box?
While the unit is plate-mounted for standard 4x4 squares or octagonal boxes, it can also be clamp-mounted via a knockout or foot-mounted, provided it is housed within a suitable enclosure as per NEC Class 2 requirements.
How many VA does this unit support?
The AT72D1683 is rated for a 40VA maximum load. Ensure the total load of your thermostats, valves, and components does not exceed this rating to prevent overheating.
This item is not eligible for free shipping.
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.
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Description
The Resideo AT72D1683 Transformer is a professional-grade solution for stepping down 120V primary voltage to a 24V secondary output, optimized for residential and light commercial HVACR control circuits. Rated at 40VA, this NEMA Type D transformer is engineered to provide stable power for 24V thermostats, gas valves, and relays. The 4"x4" plate-mounted design ensures compatibility with standard electrical boxes, while the 9-inch leadwires offer significant flexibility for wiring in tight enclosures.
As a step-down transformer, the AT72D1683 features built-in override protection and an energy-limiting design to prevent system failure under heavy load. This HVAC control transformer is built for durability, maintaining a wide operating temperature range from -20°F to 105°F. Its multi-mount versatility allows for foot, plate, or clamp mounting, meeting the rigorous standards required for NEC Class 2 installations. Use this power transformer when high efficiency and reliable voltage regulation are non-negotiable for system performance.
Key Benefits- Universal Compatibility: Seamlessly powers a wide range of 24V systems, including high-efficiency ignition systems and gas valves.
- Flexible Installation: Pre-installed 4"x4" mounting plate and 9-inch color-coded leadwires simplify field integration into junction boxes.
- Enhanced Protection: Integrated energy-limiting capability and NEMA Type D rating provide essential circuit safety without external fusing.
- Rugged Temperature Rating: Reliable performance in extreme ambient environments ranging from sub-zero to high-heat plenum spaces.
What is the primary application for the Resideo AT72D1683?
This 120V to 24V transformer is primarily used by technicians to provide low-voltage power to control circuits, thermostats, and relay coils in HVAC units.
Can this transformer be mounted outside of a junction box?
While the unit is plate-mounted for standard 4x4 squares or octagonal boxes, it can also be clamp-mounted via a knockout or foot-mounted, provided it is housed within a suitable enclosure as per NEC Class 2 requirements.
How many VA does this unit support?
The AT72D1683 is rated for a 40VA maximum load. Ensure the total load of your thermostats, valves, and components does not exceed this rating to prevent overheating.
This item is not eligible for free shipping.
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.












