Resideo AT87A1049 Transformer
The Resideo AT87A1049 Transformer is a heavy-duty 48VA HVAC control transformer designed to provide reliable 120V to 24-volt power conversion for demanding residential and commercial climate control systems. Built with a NEMA Type E rating, this foot-mounted transformer is engineered to power 24V air conditioning circuits, solenoid valves, and relays while meeting strict NEC Class 2 and UL 1585 requirements. With a primary voltage of 120 Vac and a secondary output of 26.5 V.O.C. at 60Hz, it delivers consistent potential for sensitive electronics. The unit includes integrated energy limiting overload protection to prevent circuit damage during fault conditions. For fast field installation, it features 12-inch color-coded leadwires on both the primary and secondary sides, making it a rugged drop-in solution for technicians addressing power delivery issues in multi-stage cooling or complex heating applications.
Key Benefits for HVACR Professionals- High Capacity Output: Rated at 48VA, providing ample headroom for powering multiple 24V peripherals compared to standard 40VA units.
- Circuit Safety: Built-in inherent overload protection safeguards against primary winding burnout and secondary shorts.
- Versatile Mounting: The foot-mount design allows for stable installation within air handlers, furnaces, or control panels.
- Regulatory Compliance: Fully meets UL 1585 and CSA certification standards for Class 2 non-wet and Class 3 wet applications.
- Heavy-Duty Construction: Features NEMA Type E marking and robust end bells for durability in high-temperature HVAC environments.
What is the difference between the 26.5V secondary rating and standard 24V systems?
The 26.5 V.O.C. (Voltage Open Circuit) rating ensures that under a typical load, the Resideo AT87A1049 effectively delivers a stable 24V to your components, accounting for voltage drop across longer wire runs.
Can this transformer be used for multi-stage cooling systems?
Yes, the 48VA power rating is specifically chosen by contractors for systems with higher current draws, such as those with multiple contactors or zone dampers that might exceed the capacity of a standard 120V to 24V transformer.
How do I identify the wiring for the primary and secondary connections?
This model utilizes 12-inch leadwires with industry-standard color coding (typically Black/White for 120V primary) to ensure rapid and accurate identification during service calls.
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: $99.62
-65%$99.62
$34.87Resideo AT87A1049 Transformer
The Resideo AT87A1049 Transformer is a heavy-duty 48VA HVAC control transformer designed to provide reliable 120V to 24-volt power conversion for demanding residential and commercial climate control systems. Built with a NEMA Type E rating, this foot-mounted transformer is engineered to power 24V air conditioning circuits, solenoid valves, and relays while meeting strict NEC Class 2 and UL 1585 requirements. With a primary voltage of 120 Vac and a secondary output of 26.5 V.O.C. at 60Hz, it delivers consistent potential for sensitive electronics. The unit includes integrated energy limiting overload protection to prevent circuit damage during fault conditions. For fast field installation, it features 12-inch color-coded leadwires on both the primary and secondary sides, making it a rugged drop-in solution for technicians addressing power delivery issues in multi-stage cooling or complex heating applications.
Key Benefits for HVACR Professionals- High Capacity Output: Rated at 48VA, providing ample headroom for powering multiple 24V peripherals compared to standard 40VA units.
- Circuit Safety: Built-in inherent overload protection safeguards against primary winding burnout and secondary shorts.
- Versatile Mounting: The foot-mount design allows for stable installation within air handlers, furnaces, or control panels.
- Regulatory Compliance: Fully meets UL 1585 and CSA certification standards for Class 2 non-wet and Class 3 wet applications.
- Heavy-Duty Construction: Features NEMA Type E marking and robust end bells for durability in high-temperature HVAC environments.
What is the difference between the 26.5V secondary rating and standard 24V systems?
The 26.5 V.O.C. (Voltage Open Circuit) rating ensures that under a typical load, the Resideo AT87A1049 effectively delivers a stable 24V to your components, accounting for voltage drop across longer wire runs.
Can this transformer be used for multi-stage cooling systems?
Yes, the 48VA power rating is specifically chosen by contractors for systems with higher current draws, such as those with multiple contactors or zone dampers that might exceed the capacity of a standard 120V to 24V transformer.
How do I identify the wiring for the primary and secondary connections?
This model utilizes 12-inch leadwires with industry-standard color coding (typically Black/White for 120V primary) to ensure rapid and accurate identification during service calls.
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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Product Information
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Description
The Resideo AT87A1049 Transformer is a heavy-duty 48VA HVAC control transformer designed to provide reliable 120V to 24-volt power conversion for demanding residential and commercial climate control systems. Built with a NEMA Type E rating, this foot-mounted transformer is engineered to power 24V air conditioning circuits, solenoid valves, and relays while meeting strict NEC Class 2 and UL 1585 requirements. With a primary voltage of 120 Vac and a secondary output of 26.5 V.O.C. at 60Hz, it delivers consistent potential for sensitive electronics. The unit includes integrated energy limiting overload protection to prevent circuit damage during fault conditions. For fast field installation, it features 12-inch color-coded leadwires on both the primary and secondary sides, making it a rugged drop-in solution for technicians addressing power delivery issues in multi-stage cooling or complex heating applications.
Key Benefits for HVACR Professionals- High Capacity Output: Rated at 48VA, providing ample headroom for powering multiple 24V peripherals compared to standard 40VA units.
- Circuit Safety: Built-in inherent overload protection safeguards against primary winding burnout and secondary shorts.
- Versatile Mounting: The foot-mount design allows for stable installation within air handlers, furnaces, or control panels.
- Regulatory Compliance: Fully meets UL 1585 and CSA certification standards for Class 2 non-wet and Class 3 wet applications.
- Heavy-Duty Construction: Features NEMA Type E marking and robust end bells for durability in high-temperature HVAC environments.
What is the difference between the 26.5V secondary rating and standard 24V systems?
The 26.5 V.O.C. (Voltage Open Circuit) rating ensures that under a typical load, the Resideo AT87A1049 effectively delivers a stable 24V to your components, accounting for voltage drop across longer wire runs.
Can this transformer be used for multi-stage cooling systems?
Yes, the 48VA power rating is specifically chosen by contractors for systems with higher current draws, such as those with multiple contactors or zone dampers that might exceed the capacity of a standard 120V to 24V transformer.
How do I identify the wiring for the primary and secondary connections?
This model utilizes 12-inch leadwires with industry-standard color coding (typically Black/White for 120V primary) to ensure rapid and accurate identification during service calls.
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.
