Resideo - Honeywell Home AT40A1139 Panel-Mount TransformerAT40A1139 transformer from Resideo Honeywell Home delivers a reliable 40 VA power solution, stepping down from 240V AC to 24V AC for panel mount control applications. This compact, panel mount transformer is designed to fit installations where a dedicated low voltage supply is required, providing a stable secondary voltage for compatible control circuits. Engineered to meet standard electrical panel practices, it simplifies wiring and maintenance.

1-1/4 in threaded inlet/outlet ports for easy plumbing

HL25H3TRC2

flanged x flanged end connections

It supports duct shapes round or square

with a compact form factor: 3

it detects flame quickly and responds to faults with precision

Ease of installation: Ready-to-install replacement that simplifies maintenance

24 V AC motor with 71 in-oz torque

The design emphasizes quick response times and long-term stability

helping maintain comfortable temperatures and efficient energy use

Ideal for Heil Quaker/ICP assemblies and a wide range of control panels

it supports precision control across a broad operating range and adapts to demanding industrial gas line applications