Honeywell Tradeline AT72D1725 Multi Mount Transformer (Lot of Two)

The Honeywell Tradeline AT72D1725 is a versatile Class 2 multi-mount transformer designed for low-voltage control applications, commonly used in HVAC systems, doorbells, thermostats, and other building automation setups. It features a primary input of 120V at 50/60 Hz and provides a secondary output of 24V nominal (26.5V open circuit) with a 40VA power rating, ensuring reliable power conversion for control circuits. Its multi-mount design allows for flexible installation options including plate, foot, or knockout mounting, making it adaptable to various enclosures and junction boxes. Benefits include overload protection via an internal energy-limiting fuse, compact size for space-constrained environments, and compliance with UL and CSA standards for safety. Compared to similar transformers like those from competitors (e.g., Packard or White-Rodgers), the AT72D offers superior mounting versatility and Honeywell's reputation for durability, though it may have a slightly higher cost. Drawbacks include its age (older model series), potentially limiting availability of parts, and it's not suitable for high-power applications beyond 40VA. This lot includes two units in apparent new-old-stock condition, ideal for spare parts or installations requiring redundancy. Applications span residential and commercial HVAC controls, security systems, and low-voltage lighting.