OEM Carrier Transformer 460V Primary 24V Secondary 75VA for Model TCHC2550HECMRAP600

This is the genuine OEM Carrier replacement transformer (part number HT01BD702) for the TCHC2550HECMRAP600 commercial HVAC unit. The transformer steps down the high-voltage 460V primary supply to the 24V AC control circuit voltage that powers your thermostat, relays, contactor coils, and control board. When this transformer fails, the entire low-voltage control circuit loses power — nothing responds. Symptoms include a completely unresponsive system, tripped secondary fuses, or a 24V circuit that reads zero volts at the board.

• Specs: 460VAC primary | 24V AC secondary | 75VA rated | Steel core with copper windings | Dimensions approx. 4.30″ × 3.25″ × 3.50″
• OEM vs Generic: This factory-authorized OEM part is built to exact Carrier voltage and VA tolerances. Undersized or off-spec generic transformers can sag under load, causing intermittent control board faults and premature contactor coil failure.
• Install difficulty: 3/5 — Work must be performed with power fully disconnected at the disconnect and breaker. Tools needed: multimeter, insulated screwdrivers, wire strippers, needle-nose pliers. Label all 24V secondary wiring before removal. Confirm fuse integrity on the secondary circuit before energizing.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model TCHC2550HECMRAP600 commercial HVAC equipment. Verify 460V primary supply voltage and 75VA rating on your unit's data plate before ordering. Our parts specialists are available to confirm fitment — call or chat before you order.