The MARS 44507 Transformer is a control power device that converts high-voltage (typically 120 V) supply to low-voltage (commonly 24 V) output for HVAC control circuits. It supplies stable low-voltage power to thermostats, relays, and other control components, ensuring consistent system communication and operation. Designed for use in furnaces, air handlers, heat pumps, and air condit... https://www.partshnc.com/44507-mars-277v-24v-40va-transformer