OEM Carrier 50VA Control Transformer P201-35150 for Model YAC3680YAC407C

This OEM step-down transformer is the factory-specified replacement for the Carrier YAC3680YAC407C HVAC unit. It converts high-voltage line power (120/208/240 VAC) down to safe 12/24 VAC to energize the control board, thermostat wiring, and all low-voltage system circuits. When this transformer fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system will not start, and no call for heating or cooling can be processed. Replacing a failed transformer is one of the most impactful single-part repairs you can make to restore full system operation.

• Specs: 50 VA rating | Primary: 120/208/240 VAC | Secondary: 12/24 VAC | 60 Hz single-phase | CSA listed | Part # P201-35150
• OEM vs Generic: This is a genuine Carrier/Totaline factory-authorized transformer built to exact VA and voltage tolerances. Generic transformers often deviate in VA rating, causing nuisance tripping, control board undervoltage faults, or premature burnout of downstream components.
• Install Difficulty: 3/5 — Requires shutting off power at the disconnect and breaker before work begins. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wiring before disconnecting. Confirm primary voltage tap matches your supply voltage (120V or 240V).
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model YAC3680YAC407C. Also cross-references Totaline P201-35150. Verify your existing transformer's VA rating and primary voltage configuration on the data plate before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before every order — contact us today.