Resideo AT140B1297/B Transformer
Professional grade power management is critical for modern control circuits, and the Resideo AT140B1297/B Transformer delivers the stability needed for field reliability. This 40VA foot-mount transformer is engineered to convert a 120V primary voltage down to a 24V secondary output, making it a standard replacement for residential and light commercial HVAC applications. Built as a Class 2 transformer, it provides the necessary safety isolation for powering thermostats, zone valves, and gas valves without risking sensitive electronics. The 60Hz design features metal end bells and a rugged construction that withstands the temperature fluctuations common in mechanical rooms. This Honeywell Home compatible transformer is UL listed (UL 1585) and meets all NEC requirements for low-voltage power sources. For contractors looking to reduce truck stock, this universal 24V control transformer provides the electrical capacity to handle most multi-stage cooling or heating control loops without voltage drop-off during peak induction.
Technical Benefits for the Field:
- High Current Capacity: Provides a full 40VA rating, ensuring enough overhead for modern smart thermostats and multiple zone dampers.
- Integrated Safety: Built to UL 1585 standards as a Class 2 power supply, preventing circuit overloads and equipment damage.
- Flexible Mounting: Features a versatile foot-mount configuration that facilitates fast upgrades in tight air handler or furnace cabinets.
- Stable Voltage Regulation: Maintains a consistent 24V output from a 120V source to prevent chatter in contactors and relays.
- Industry Standard Connections: Color-coded lead wires simplify identification during HVAC transformer replacement.
Common Installation Questions:
Can I use this to power a WiFi thermostat?
Yes. The 40VA rating on this Resideo 24V transformer provides more than enough power for even the most power-hungry smart thermostats and associated control modules.
Is this compatible with older 120V systems?
This unit is specifically designed for 120V primary input. For 208V or 240V primary applications, you would require a multi-tap HVAC control transformer rather than this dedicated 120V model.
Where should this transformer be mounted?
The foot-mount design is intended for installation inside an electrical junction box or within the appliance cabinet to protect the 120V connections and ensure NEC compliance.
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 AT140B1297/B Transformer
Professional grade power management is critical for modern control circuits, and the Resideo AT140B1297/B Transformer delivers the stability needed for field reliability. This 40VA foot-mount transformer is engineered to convert a 120V primary voltage down to a 24V secondary output, making it a standard replacement for residential and light commercial HVAC applications. Built as a Class 2 transformer, it provides the necessary safety isolation for powering thermostats, zone valves, and gas valves without risking sensitive electronics. The 60Hz design features metal end bells and a rugged construction that withstands the temperature fluctuations common in mechanical rooms. This Honeywell Home compatible transformer is UL listed (UL 1585) and meets all NEC requirements for low-voltage power sources. For contractors looking to reduce truck stock, this universal 24V control transformer provides the electrical capacity to handle most multi-stage cooling or heating control loops without voltage drop-off during peak induction.
Technical Benefits for the Field:
- High Current Capacity: Provides a full 40VA rating, ensuring enough overhead for modern smart thermostats and multiple zone dampers.
- Integrated Safety: Built to UL 1585 standards as a Class 2 power supply, preventing circuit overloads and equipment damage.
- Flexible Mounting: Features a versatile foot-mount configuration that facilitates fast upgrades in tight air handler or furnace cabinets.
- Stable Voltage Regulation: Maintains a consistent 24V output from a 120V source to prevent chatter in contactors and relays.
- Industry Standard Connections: Color-coded lead wires simplify identification during HVAC transformer replacement.
Common Installation Questions:
Can I use this to power a WiFi thermostat?
Yes. The 40VA rating on this Resideo 24V transformer provides more than enough power for even the most power-hungry smart thermostats and associated control modules.
Is this compatible with older 120V systems?
This unit is specifically designed for 120V primary input. For 208V or 240V primary applications, you would require a multi-tap HVAC control transformer rather than this dedicated 120V model.
Where should this transformer be mounted?
The foot-mount design is intended for installation inside an electrical junction box or within the appliance cabinet to protect the 120V connections and ensure NEC compliance.
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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Description
Professional grade power management is critical for modern control circuits, and the Resideo AT140B1297/B Transformer delivers the stability needed for field reliability. This 40VA foot-mount transformer is engineered to convert a 120V primary voltage down to a 24V secondary output, making it a standard replacement for residential and light commercial HVAC applications. Built as a Class 2 transformer, it provides the necessary safety isolation for powering thermostats, zone valves, and gas valves without risking sensitive electronics. The 60Hz design features metal end bells and a rugged construction that withstands the temperature fluctuations common in mechanical rooms. This Honeywell Home compatible transformer is UL listed (UL 1585) and meets all NEC requirements for low-voltage power sources. For contractors looking to reduce truck stock, this universal 24V control transformer provides the electrical capacity to handle most multi-stage cooling or heating control loops without voltage drop-off during peak induction.
Technical Benefits for the Field:
- High Current Capacity: Provides a full 40VA rating, ensuring enough overhead for modern smart thermostats and multiple zone dampers.
- Integrated Safety: Built to UL 1585 standards as a Class 2 power supply, preventing circuit overloads and equipment damage.
- Flexible Mounting: Features a versatile foot-mount configuration that facilitates fast upgrades in tight air handler or furnace cabinets.
- Stable Voltage Regulation: Maintains a consistent 24V output from a 120V source to prevent chatter in contactors and relays.
- Industry Standard Connections: Color-coded lead wires simplify identification during HVAC transformer replacement.
Common Installation Questions:
Can I use this to power a WiFi thermostat?
Yes. The 40VA rating on this Resideo 24V transformer provides more than enough power for even the most power-hungry smart thermostats and associated control modules.
Is this compatible with older 120V systems?
This unit is specifically designed for 120V primary input. For 208V or 240V primary applications, you would require a multi-tap HVAC control transformer rather than this dedicated 120V model.
Where should this transformer be mounted?
The foot-mount design is intended for installation inside an electrical junction box or within the appliance cabinet to protect the 120V connections and ensure NEC compliance.
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.
