OEM Carrier 50VA Control Transformer P201-35150 for Model YAC3080YAC106

The Carrier P201-35150 is the factory-specified 50VA step-down transformer for the YAC3080YAC106 packaged unit. Its sole job is to convert high-voltage line power (120/208/240 VAC) down to safe 12/24V AC for every low-voltage control circuit in your system — including the control board, thermostat, and accessory terminals. When this transformer fails, the entire control circuit goes dark: the thermostat goes blank, the system won't respond to any call for heating or cooling, and in some cases a shorted secondary can trip your low-voltage fuse or damage downstream boards. Replacing it with the correct OEM unit restores factory-spec voltage regulation and protects every component downstream.

• Specs: 50 VA rating | Primary: 120/208/240 VAC multi-tap | Secondary: 12/24 VAC | 60 Hz single-phase | CSA listed | Dimensions: 3.8" L × 3.1" W × 2.2" H
• OEM vs Generic: This is a genuine Carrier/Totaline factory-authorized part. OEM transformers maintain tight voltage output under load, protecting sensitive control boards. Off-brand units often sag under VA load, causing nuisance lockouts and premature board failures.
• Install difficulty: 3/5 — Line-voltage wiring is involved. Shut off all power at the disconnect and breaker before starting. Tools needed: multimeter, screwdrivers (flathead and Phillips), wire stripper, needle-nose pliers. Photograph all wiring connections before disconnecting. Verify primary tap matches your supply voltage before energizing.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model YAC3080YAC106. Also sold under the Totaline brand (same part, same factory). Cross-reference: HCTY156D0LS11102. Confirm your unit's data plate shows a 50VA transformer requirement and a 120/208/240V primary before ordering. Need help verifying fitment? Our HVAC parts specialists are ready to confirm before you buy.