OEM Carrier Control Transformer 40VA 208/240V to 24V for Model SUBCLR50HJ440480

This is the genuine OEM Carrier control transformer (part #HT01BD209) factory-specified for the Carrier SUBCLR50HJ440480. The transformer steps down line voltage from 208/240V to a safe 24V signal used by the thermostat, control board, contactor coil, and all low-voltage circuits. When this transformer fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system won't call for heating or cooling, and no fault codes will display because the board itself has no power.

• Specs: 40VA capacity | 208/240V primary input | 24V secondary output | 50/60 Hz compatible | Class 2 control transformer | Foot-mount configuration
• OEM vs Generic: This factory-original unit is wound to exact VA and voltage tolerances. Undersized or off-spec generic transformers can overheat, trip internal thermal protection, or fail within one season — leading to repeat service calls and voided equipment warranties.
• Install difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always label or photograph existing wiring connections before disconnecting. Verify 24V output at secondary terminals after installation before restoring system power.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier SUBCLR50HJ440480. Also cross-references and replaces legacy part numbers HT01BD207, HT01CN232, and 9076-00. Confirm your unit's voltage requirements against your data plate before ordering. Our technical team is available to verify fitment — order with confidence.