Description
The Trane SFTRR40VA Transformer is used to convert electrical power for low-voltage control circuits in furnaces, rooftop units, air handlers, and packaged equipment. Designed with a 120/208/240V primary input and a 24V secondary output rated at 40VA, it steps down incoming voltage to supply power for thermostats, relays, contactors, and control boards. Installed within the electrical control compartment, the transformer connected components communicate and operate correctly, while HVAC systems use it to maintain proper voltage distribution throughout equipment control circuits and support coordinated electrical operation.
