Resideo by HoneyWell AT140B1297/B to Transformer Transformers - 120V 24V 40VA

The Resideo by Honeywell AT140B1297/B is a 40VA step-down transformer designed for HVAC control systems and thermostats. This transformer converts standard 120-volt primary power to 24-volt secondary output, providing reliable low-voltage power for heating and cooling equipment controls.

Key Specifications:

• Primary Voltage: 120VAC
• Secondary Voltage: 24VAC
• Power Rating: 40VA (volt-ampere)
• Suitable for residential and light commercial HVAC applications
• Class 2 transformer for safe, low-voltage control circuits
• UL listed for safety and reliability

This transformer provides sufficient power capacity for most standard thermostats and HVAC control systems, with the 40VA rating ensuring adequate current supply for typical system demands including contactors, relays, and zone controls.