About the Resideo Plate Mounted 120 V Transformer with 9" Lead Wires - AT72D1188
Quick Install, Long-Lasting Power!
The Resideo AT72D1188 is a reliable 120 Vac plate-mounted transformer designed to power low-voltage HVAC components such as thermostats, relays, and gas valves. With dimensions of 3-7/32" high by 2-7/32" wide and a depth of 2-15/16" behind, this transformer fits easily into standard 4" x 4" junction boxes, making it ideal for tight installations, retrofits, and service replacements. It comes with 9-inch color-coded lead wires for quick, secure connections. It includes override protection and meets NEC Class 2 not wet, Class 3, UL 1585, and NEMA Type D standards for safety and performance. Built to handle tough environments, it works in temperatures from -20°F to +105°F and supports both 50 Hz and 60 Hz power systems. Whether you’re upgrading a system or replacing a failed transformer, this AT72D1188 delivers safe, reliable, and consistent power to your HVAC system.
Resideo is a trusted manufacturer known for its smart home solutions and HVAC controls, providing reliable thermostats, security systems, and energy-efficient products for residential and light commercial use. Power your HVAC system the smart way with this Resideo AT72D1188. Snag this deal now, only here at PlumbersStock!
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PLEASE NOTE: You may notice a change from “Honeywell Home” to “Resideo” on our product pages. This reflects a transition that began in 2018, when Resideo became an independent company after spinning off from Honeywell. While the Honeywell Home brand remains trusted and familiar, Resideo is now the company that designs, manufactures, and supports these home comfort and security products. The name may be changing, but the quality, reliability, and innovation you’ve come to expect remain exactly the same.