OEM Carrier 50VA Control Transformer 120/208/240V–12/24V for Model YAC3680YAC208T

This is the OEM factory-replacement control transformer (Part# P201-35150) for the Carrier YAC3680YAC208T unit. The transformer steps down high-voltage line power — 120, 208, or 240 VAC — to the low-voltage 12/24V AC signal that powers your system's control board, thermostat, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and circuit breakers may trip if the secondary is shorted. Replacing the transformer with the correct OEM part restores full system communication and protects downstream components from voltage irregularities.

• Specs: 50VA rating | Primary: 120/208/240 VAC | Secondary: 12/24V AC | Single-phase | 60 Hz | Factory-matched Carrier/Totaline specification (P201-35150)
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances specified by Carrier engineering. Undersized or off-tolerance generic units can overload, overheat, and damage control boards — the most expensive component in the system.
• Install Difficulty: 3/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper, and needle-nose pliers. Label all low-voltage wires before removing the old unit. Verify 24V output at secondary terminals with a multimeter before buttoning up the panel.
• Warranty: 1-year OEM factory warranty. Ships same business day from our stocked warehouse — no back-order delays.

Compatibility: Designed as the OEM replacement for Carrier YAC3680YAC208T HVAC equipment. Always verify your unit's data plate voltage requirements match the 120/208/240V primary and 12/24V secondary specifications before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your system back online fast.