OEM Carrier 40VA Control Transformer HT01BD236 for Model C50A506061

This OEM replacement transformer (part number HT01BD236) is the factory-specified control circuit transformer for the Carrier C50A506061 commercial packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, contactor coil, gas valve, and every other low-voltage control component in the system. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system will not respond to any call for heating or cooling, and no safety safeties or diagnostics can operate. A failed transformer is often misdiagnosed as a bad control board, making correct identification critical before ordering parts.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched output for reliable low-voltage control circuit operation
• OEM vs Generic: This OEM transformer is wound and insulated to Carrier's exact VA rating and thermal protection specs. Generic transformers frequently run under-rated VA, causing nuisance trips and premature burnout — especially under peak demand in commercial applications.
• Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Verify 120V input and 24V output with a meter before and after installation. Photograph existing wire connections before disconnecting.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C50A506061 commercial rooftop/packaged unit. Verify primary voltage (120V) and VA rating on your unit's wiring diagram or data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — same-day shipping guaranteed on in-stock orders.