Resideo AT140A1000 Transformer
The Resideo AT140A1000 Transformer is a heavy-duty 40 VA solution designed to provide reliable 24V power for residential and light commercial HVAC control systems. As a Class 2 step-down transformer, it converts a 120V primary input to a 27V secondary (open circuit), ensuring stable operation for thermostats, gas valves, relays, and zone controllers. This unit is built for versatile field application, featuring multiple mounting configurations including foot mount, plate mount on standard 2x4 or 4x4 outlet boxes, and clamp mount via outlet box knockouts. The inclusion of metal end bells protects the internal windings, making it a rugged choice for demanding mechanical rooms. For ease of installation, the primary side utilizes 9-inch color-coded lead wires, while the secondary side provides standard screw terminals for secure low-voltage terminations. This HVAC control transformer meets NEC Class 2 requirements and is UL 1585 listed, making it a direct Honeywell AT140A1000 replacement for many generic or failed 40VA units in the field.
Key Benefits- Universal Mounting Flexibility: Supports foot, plate, clamp, and panel mounting to fit existing box configurations or new installations.
- Enhanced Protection: Integrated metal end bells shield the unit from physical damage and manage heat dissipation effectively.
- Contractor-Friendly Wiring: Streamlined setup with 9-inch lead wires on the primary side and multi-terminal secondary connections.
- Broad Compatibility: Rated at 40 VA, providing sufficient overhead for most single-zone heating and cooling control circuits.
- Code Compliance: Meets UL 1585 and NEC Class 2 standards for "not wet" environments, ensuring professional-grade safety.
Is the AT140A1000 compatible with 208V or 240V systems?
No, this specific model is a dedicated 120V primary transformer. For multi-tap applications (120/208/240V), verify the specific model suffix, as the AT140A1000 is strictly for 120V circuits.
Can I use this transformer for zone valve systems?
Yes, provided the total VA draw of the zone valves and thermostats does not exceed the 40 VA rating. It is commonly used to power 24V hydronic and air-side control logic.
What does the 27V secondary rating mean for 24V equipment?
The 27V represents the secondary open-circuit voltage. Once under a standard load, the output stabilizes to the nominal 24V required by standard HVAC components.
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 AT140A1000 Transformer
The Resideo AT140A1000 Transformer is a heavy-duty 40 VA solution designed to provide reliable 24V power for residential and light commercial HVAC control systems. As a Class 2 step-down transformer, it converts a 120V primary input to a 27V secondary (open circuit), ensuring stable operation for thermostats, gas valves, relays, and zone controllers. This unit is built for versatile field application, featuring multiple mounting configurations including foot mount, plate mount on standard 2x4 or 4x4 outlet boxes, and clamp mount via outlet box knockouts. The inclusion of metal end bells protects the internal windings, making it a rugged choice for demanding mechanical rooms. For ease of installation, the primary side utilizes 9-inch color-coded lead wires, while the secondary side provides standard screw terminals for secure low-voltage terminations. This HVAC control transformer meets NEC Class 2 requirements and is UL 1585 listed, making it a direct Honeywell AT140A1000 replacement for many generic or failed 40VA units in the field.
Key Benefits- Universal Mounting Flexibility: Supports foot, plate, clamp, and panel mounting to fit existing box configurations or new installations.
- Enhanced Protection: Integrated metal end bells shield the unit from physical damage and manage heat dissipation effectively.
- Contractor-Friendly Wiring: Streamlined setup with 9-inch lead wires on the primary side and multi-terminal secondary connections.
- Broad Compatibility: Rated at 40 VA, providing sufficient overhead for most single-zone heating and cooling control circuits.
- Code Compliance: Meets UL 1585 and NEC Class 2 standards for "not wet" environments, ensuring professional-grade safety.
Is the AT140A1000 compatible with 208V or 240V systems?
No, this specific model is a dedicated 120V primary transformer. For multi-tap applications (120/208/240V), verify the specific model suffix, as the AT140A1000 is strictly for 120V circuits.
Can I use this transformer for zone valve systems?
Yes, provided the total VA draw of the zone valves and thermostats does not exceed the 40 VA rating. It is commonly used to power 24V hydronic and air-side control logic.
What does the 27V secondary rating mean for 24V equipment?
The 27V represents the secondary open-circuit voltage. Once under a standard load, the output stabilizes to the nominal 24V required by standard HVAC components.
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
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Shipping & Returns
Description
The Resideo AT140A1000 Transformer is a heavy-duty 40 VA solution designed to provide reliable 24V power for residential and light commercial HVAC control systems. As a Class 2 step-down transformer, it converts a 120V primary input to a 27V secondary (open circuit), ensuring stable operation for thermostats, gas valves, relays, and zone controllers. This unit is built for versatile field application, featuring multiple mounting configurations including foot mount, plate mount on standard 2x4 or 4x4 outlet boxes, and clamp mount via outlet box knockouts. The inclusion of metal end bells protects the internal windings, making it a rugged choice for demanding mechanical rooms. For ease of installation, the primary side utilizes 9-inch color-coded lead wires, while the secondary side provides standard screw terminals for secure low-voltage terminations. This HVAC control transformer meets NEC Class 2 requirements and is UL 1585 listed, making it a direct Honeywell AT140A1000 replacement for many generic or failed 40VA units in the field.
Key Benefits- Universal Mounting Flexibility: Supports foot, plate, clamp, and panel mounting to fit existing box configurations or new installations.
- Enhanced Protection: Integrated metal end bells shield the unit from physical damage and manage heat dissipation effectively.
- Contractor-Friendly Wiring: Streamlined setup with 9-inch lead wires on the primary side and multi-terminal secondary connections.
- Broad Compatibility: Rated at 40 VA, providing sufficient overhead for most single-zone heating and cooling control circuits.
- Code Compliance: Meets UL 1585 and NEC Class 2 standards for "not wet" environments, ensuring professional-grade safety.
Is the AT140A1000 compatible with 208V or 240V systems?
No, this specific model is a dedicated 120V primary transformer. For multi-tap applications (120/208/240V), verify the specific model suffix, as the AT140A1000 is strictly for 120V circuits.
Can I use this transformer for zone valve systems?
Yes, provided the total VA draw of the zone valves and thermostats does not exceed the 40 VA rating. It is commonly used to power 24V hydronic and air-side control logic.
What does the 27V secondary rating mean for 24V equipment?
The 27V represents the secondary open-circuit voltage. Once under a standard load, the output stabilizes to the nominal 24V required by standard HVAC components.
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.
