Resideo by HoneyWell AT40A1121 40VA Transformer 120V to 24V Foot Mount

The Resideo by HoneyWell AT40A1121 is a 40VA step-down transformer designed for HVAC and control system applications. This reliable transformer converts standard 120-volt AC power to 24-volt AC, providing the necessary voltage for thermostats, zone controls, and other low-voltage HVAC components.

Key Specifications:

• Power Rating: 40VA (Volt-Amperes)
• Primary Voltage: 120VAC, 60Hz
• Secondary Voltage: 24VAC
• Mounting Style: Foot mount configuration for easy installation
• Replaces Models: AT40C1004 and AT40A1014
• Class 2 power supply for safe, code-compliant operation

This transformer features a foot-mounted design that allows for flexible installation in furnaces, air handlers, or standalone enclosures. The 40VA capacity provides sufficient power for most residential HVAC control circuits, including standard thermostats and multi-zone control panels. Built to Resideo's quality standards, the AT40A1121 offers reliable performance and long service life in demanding heating and cooling applications.

As a direct replacement for the AT40C1004 and AT40A1014 models, this transformer ensures backward compatibility for service and retrofit applications.