The Trane TRR02736 Step-Down Transformer converts 115V AC power to 24V AC at 60 Hz, providing low-voltage power for compatible HVAC control circuits. Designed for Class 2 applications, it supports control components such as thermostats, relays, and control boards in compatible heating and air conditioning systems. By supplying the required voltage, this transformer helps ensure reliab... https://www.partshnc.com/trane-trr02736-step-down-transformer-115v-ac-24vac-60-hz-class-2