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The Honeywell model AT40A1121/U is a transformer with a power rating of forty VA. It converts 120 VAC to 24 VAC and is designed for channel frame mounting.
This transformer is suitable for various electrical applications, providing reliable step-down voltage conversion for HVAC systems, lighting controls, and other low voltage needs.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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