
Resideo AT72D1691 Transformer
The Resideo AT72D1691 Transformer is a heavy-duty 40VA power solution engineered for consistent performance in demanding HVACR applications. Designed for versatile installation, this plate mounted 24V transformer features a multi-tap primary, allowing for easy integration with 208V/240V power supplies. It provides a stable 26.5 V.O.C. secondary output, making it ideal for powering complex control circuits, including thermostats, gas valves, and relays. Built to meet rigorous industry standards, this NEMA Type D transformer is energy-limiting and features a manual reset button for override protection, ensuring safe operation within NEC Class 2 and Class 3 environments. The 9-inch color-coded leadwires simplify identification during Honeywell transformer wiring, and the 4x4-inch plate mounting configuration ensures a secure fit on standard electrical boxes without protruding into the junction space.
Key Benefits- Multi-Voltage Compatibility: Supports both 208V and 240V primary inputs for broad equipment compatibility.
- Enhanced Safety: NEMA Type D enclosure and NEC Class 2 compliance with energy-limiting burnout protection.
- Flexible Mounting: Includes a 4x4-inch plate for standard junction box mounting, while supporting foot and clamp configurations.
- Simplified Installation: 9-inch color-coded leadwires (Black-COM, Red-208V, Orange-240V) ensure fast, accurate connections.
How do I wire the AT72D1691 for 240V systems?
Connect the Orange leadwire to the 240V hot leg and the Black leadwire to the common/neutral leg. Ensure the unused Red (208V) lead is safely capped with a wire nut.
Is the AT72D1691 compatible with smart thermostats?
Yes, the 40VA rating provides sufficient overhead to power most modern 24V smart thermostats and associated control relays simultaneously.
Does this transformer include a built-in circuit breaker?
The AT72D series often features a manual reset button for internal override protection, though external fusing is always recommended for primary circuit safeguarding.
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.
Original: $42.88
-65%$42.88
$15.01Resideo AT72D1691 Transformer
The Resideo AT72D1691 Transformer is a heavy-duty 40VA power solution engineered for consistent performance in demanding HVACR applications. Designed for versatile installation, this plate mounted 24V transformer features a multi-tap primary, allowing for easy integration with 208V/240V power supplies. It provides a stable 26.5 V.O.C. secondary output, making it ideal for powering complex control circuits, including thermostats, gas valves, and relays. Built to meet rigorous industry standards, this NEMA Type D transformer is energy-limiting and features a manual reset button for override protection, ensuring safe operation within NEC Class 2 and Class 3 environments. The 9-inch color-coded leadwires simplify identification during Honeywell transformer wiring, and the 4x4-inch plate mounting configuration ensures a secure fit on standard electrical boxes without protruding into the junction space.
Key Benefits- Multi-Voltage Compatibility: Supports both 208V and 240V primary inputs for broad equipment compatibility.
- Enhanced Safety: NEMA Type D enclosure and NEC Class 2 compliance with energy-limiting burnout protection.
- Flexible Mounting: Includes a 4x4-inch plate for standard junction box mounting, while supporting foot and clamp configurations.
- Simplified Installation: 9-inch color-coded leadwires (Black-COM, Red-208V, Orange-240V) ensure fast, accurate connections.
How do I wire the AT72D1691 for 240V systems?
Connect the Orange leadwire to the 240V hot leg and the Black leadwire to the common/neutral leg. Ensure the unused Red (208V) lead is safely capped with a wire nut.
Is the AT72D1691 compatible with smart thermostats?
Yes, the 40VA rating provides sufficient overhead to power most modern 24V smart thermostats and associated control relays simultaneously.
Does this transformer include a built-in circuit breaker?
The AT72D series often features a manual reset button for internal override protection, though external fusing is always recommended for primary circuit safeguarding.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Resideo AT72D1691 Transformer is a heavy-duty 40VA power solution engineered for consistent performance in demanding HVACR applications. Designed for versatile installation, this plate mounted 24V transformer features a multi-tap primary, allowing for easy integration with 208V/240V power supplies. It provides a stable 26.5 V.O.C. secondary output, making it ideal for powering complex control circuits, including thermostats, gas valves, and relays. Built to meet rigorous industry standards, this NEMA Type D transformer is energy-limiting and features a manual reset button for override protection, ensuring safe operation within NEC Class 2 and Class 3 environments. The 9-inch color-coded leadwires simplify identification during Honeywell transformer wiring, and the 4x4-inch plate mounting configuration ensures a secure fit on standard electrical boxes without protruding into the junction space.
Key Benefits- Multi-Voltage Compatibility: Supports both 208V and 240V primary inputs for broad equipment compatibility.
- Enhanced Safety: NEMA Type D enclosure and NEC Class 2 compliance with energy-limiting burnout protection.
- Flexible Mounting: Includes a 4x4-inch plate for standard junction box mounting, while supporting foot and clamp configurations.
- Simplified Installation: 9-inch color-coded leadwires (Black-COM, Red-208V, Orange-240V) ensure fast, accurate connections.
How do I wire the AT72D1691 for 240V systems?
Connect the Orange leadwire to the 240V hot leg and the Black leadwire to the common/neutral leg. Ensure the unused Red (208V) lead is safely capped with a wire nut.
Is the AT72D1691 compatible with smart thermostats?
Yes, the 40VA rating provides sufficient overhead to power most modern 24V smart thermostats and associated control relays simultaneously.
Does this transformer include a built-in circuit breaker?
The AT72D series often features a manual reset button for internal override protection, though external fusing is always recommended for primary circuit safeguarding.
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.












