OEM Carrier Transformer 40VA 120V/24V for Model C50A506052

This is the factory OEM replacement transformer (part number HT01BD236) for the Carrier C50A506052 commercial packaged unit. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including the thermostat, contactor coil, and all safety controls. When the transformer fails, the entire control circuit goes dark: the thermostat loses power, the system becomes completely unresponsive, and no heating or cooling function can be initiated. A failed transformer is often indicated by a tripped secondary fuse, a burning smell near the control board, or a multimeter reading of 0V on the 24V secondary terminals.

• Specs: 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched construction for direct drop-in replacement
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the control board. Undersized or off-tolerance generic transformers can cause erratic relay chatter, nuisance tripping, or premature control board failure due to voltage sag under load.
• Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire strippers, multimeter. Verify 0V on primary terminals before touching wiring. Always label or photograph wire connections prior to removal.
• Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier C50A506052 commercial rooftop/packaged unit. Always verify your unit's control circuit voltage requirements on the data plate before ordering. If you're unsure about fitment, our HVAC parts specialists are available to confirm compatibility before you purchase.