Resideo - Honeywell Home AT88A1047 Air Conditioning Transformer

Air Conditioning Transformer AT88A1047 by Resideo/Honeywell Home delivers reliable 24 VAC control power for residential HVAC and combustion control systems. With a 480 VAC primary input and a 24 VAC secondary, this transformer operates at 50/60 Hz and provides up to 75 VA of power, making it a robust solution for modern furnaces and air conditioning setups.

Built for durability, it features an internally fused secondary for overload protection and a compact foot-mount design that simplifies installation in tight mechanical rooms or equipment enclosures. This unit is UL and CSA approved for safety and compliance.

• Primary voltage: 480 VAC
• Secondary voltage: 24 VAC
• Power rating: 75 VA at 24 VAC
• Frequency: 50/60 Hz
• Temperature rise: -20 to 105 °F
• Dimensions: 2-15/16" H x 2-3/16" W x 3-5/16" D
• Mounting: Foot mount
• Application: Residential combustion control system
• Approvals: UL, CSA
• Protection: Internally fused secondary for overload protection

This transformer is an ideal, code-compliant power source for 24 VAC control circuits, delivering predictable performance and easy integration into existing equipment.