Resideo - Honeywell Home AT72D1188

Resideo - Honeywell Home AT72D1188 is a 40 VA transformer designed for plate mounting, converting 120V input to a 24V low-voltage output. This HVAC transformer provides a reliable power source for thermostats, relays, and control boards in residential systems, supporting reliable operation of heating and cooling equipment.

With a compact plate-mount design, it installs quickly in standard electrical panels, saving space while delivering steady performance. The AT72D1188 is built to support typical home control circuits, helping to ensure smooth furnace and air handler operation under daily cycles and seasonal demand.

Key features

• Power rating: 40 VA transformer for steady low-voltage supply
• Input/Output: 120V primary, 24V secondary
• Mounting: Plate-mount design for easy installation
• Application: Ideal for thermostats, relays, and control boards
• Durability: Robust construction designed for long-term use