OEM Carrier 50VA Control Circuit Transformer for Model YAC3680YAC307C

This is the factory-specified OEM replacement control circuit transformer for the Carrier YAC3680YAC307C. The transformer steps down high-voltage line power (120/208/240 VAC) to safe low-voltage output (12/24 VAC) to energize your system's control board, thermostat circuit, and all low-voltage accessories. When this transformer fails, the entire control circuit goes dead — your thermostat will show no response, the system won't call for heating or cooling, and no fault codes will display because the board itself has no power. Replacing the transformer with the correct OEM part restores factory-spec voltage regulation and protects downstream components from over- or under-voltage stress.

• Specs: 50VA rating | Primary voltage: 120/208/240 VAC | Secondary voltage: 12/24 VAC | 60 Hz | Single phase | OEM Part Number: P201-35150
• OEM vs Generic: This is the genuine Carrier factory part, manufactured to exact VA rating and impedance tolerances. Generic transformers with loose VA tolerances can underpower control boards, causing nuisance lockouts, erratic behavior, or premature board failure.
• Install difficulty: 2/5 — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before removal. Verify primary tap selection matches your supply voltage before energizing.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model YAC3680YAC307C. Verify your unit's supply voltage (120V or 208/240V) matches the correct primary tap on this transformer before installation. Our parts specialists are available to confirm fitment — contact us before ordering if you have any questions.