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The Resideo AT40A1139/U is a channel frame or foot mounted 240 Vac transformer designed for step-down applications. It is ideal for powering 24 Vac control systems effectively. This transformer is suitable for any application that requires a 24 Vac supply without exceeding its volt-ampere (VA) rating.
Designed to meet specific voltage needs while ensuring reliable performance.
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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