Functional Devices TR20VA004 Transformer 277/240/208/120 Primary 24V Secondary 20VA

The Functional Devices TR20VA004 Transformer is a power conversion component used to step down 277/240/208/120VAC input voltage to 24VAC for compatible control circuits and equipment operation. Commonly installed in HVAC systems, the transformer supplies low-voltage power to thermostats, relays, controllers, and other connected parts within the system. Its role within the equipment includes supporting stable voltage conversion, assisting with control circuit operation, and helping maintain reliable electrical performance across designated heating, cooling, and building automation applications.