OEM Carrier Control Transformer 50VA 120/208/240V–12/24V for Model YAC48140YAC304C

This OEM Carrier control transformer (part number P201-35150) is the factory-specified replacement for the Carrier YAC48140YAC304C packaged unit. The transformer steps down high-voltage line power (120/208/240 VAC) to the safe low-voltage signal (12/24 VAC) required to energize the thermostat, control board, contactor coil, and all other 24V control-circuit components. When it fails, the entire low-voltage control circuit goes dead — the thermostat goes blank, the system won't respond to any calls for heating or cooling, and nothing operates even though line voltage is present at the unit.

• Specs: 50 VA rating | Primary: 120/208/240 VAC | Secondary: 12/24 VAC | 60 Hz | Single phase | CSA listed | Totaline/Carrier Factory Authorized Part
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, manufactured to exact VA and voltage tolerances. Generic transformers often run undersized VA ratings that overheat under full control-circuit load, causing nuisance shutdowns and premature failure of downstream boards.
• Install difficulty: 3/5 — Line voltage is present at the transformer primary; always disconnect power at the breaker and verify with a meter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire stripper, multimeter. Label or photograph all wiring connections before removal.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse — order by 3PM local time.

Compatibility: Direct OEM replacement for Carrier YAC48140YAC304C packaged units. Cross-references Totaline P201-35150 and part number HCTY156D0LS11102. Verify primary voltage configuration (120V or 240V) matches your unit's wiring before installation. Have questions about fitment? Our HVAC parts team confirms compatibility before you order — in stock and ready to ship today.