OEM Carrier Control Transformer 50VA 120/208/240V–12/24V (P201-35150) for Model YAC36100YAC305A

This is the genuine OEM factory-replacement control transformer for the Carrier YAC36100YAC305A HVAC system. The transformer is the nerve center of your low-voltage control circuit — it steps down 120/208/240V line power to a safe 12/24V signal used by the thermostat, control board, contactors, and all low-voltage components. When it fails, the entire system goes dark: your thermostat goes blank, the unit won't respond to calls for cooling or heating, and you may blow a 5-amp control fuse repeatedly. Replacing the transformer with a matched OEM unit restores full system control immediately.

• Specs: 50VA 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 | Weight: 2.3 lbs
• OEM vs Generic: This is the exact Carrier/Totaline factory-specified unit (P201-35150). Generic transformers often carry ±10% VA tolerances and use lower-grade core laminations — under a full control-circuit load, an undersized transformer will run hot, hum loudly, and fail prematurely. OEM means exact VA headroom and verified insulation class.
• Install difficulty: 3/5 — Always shut off power at the breaker and verify zero voltage before disconnecting wires. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester, wire labels or phone camera for documentation. Note primary tap selection (120V vs 208/240V) before wiring — incorrect tap = immediate failure.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse. Orders placed before 3 PM local time leave today.

Compatibility: Direct OEM replacement for Carrier model YAC36100YAC305A. Also cross-references Totaline P201-35150 and Carrier part HCTY156D0LS11102. Verify your unit's data plate voltage before selecting the primary tap. Need help confirming fitment? Our HVAC parts specialists are standing by — order with confidence.