What are the specs for this Transformer?

The correct replacement for Carrier model TCHC2550HECMRAP601 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Carrier equipment which lists the model number TCHC2550HECMRAP601.

Is this transformer compatible with Bryant or Payne systems too?

Many Carrier parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Carrier

OEM Carrier Transformer 460V–24V 75VA for TCHC2550HECMRAP601

Name: OEM Carrier Transformer 460V–24V 75VA for TCHC2550HECMRAP601
Brand: Carrier
SKU: CARRIE-TCHC2550HECMRAP601-TRANSFORMER-HT01BD702
Price: 70.20 USD
Availability: InStock

SKU: CARRIE-TCHC2550HECMRAP601-TRANSFORMER-HT01BD702 Brand: Carrier

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OEM Carrier Control Transformer 460V–24V 75VA — HT01BD702 for Model TCHC2550HECMRAP601

This is the genuine OEM Carrier control transformer (part# HT01BD702), factory-specified for the TCHC2550HECMRAP601 commercial HVAC unit. The transformer steps down 460V line voltage to the 24V signal used by thermostats, contactors, control boards, and every other low-voltage component in the system. When it fails, the entire control circuit goes dead — no thermostat response, no staging, no operation at all. Replacing it with the correct OEM part is the fastest path back to full system function.

Specs: 460V AC primary | 24V secondary | 75VA power rating | Compact steel-core, copper-wound construction | Direct OEM drop-in replacement
OEM vs Generic: OEM transformers are wound and rated to Carrier's exact tolerances. Undersized or off-spec generic units can sag under load, causing erratic control-board behavior, nuisance tripping, and premature component failure across the entire low-voltage circuit.
Install difficulty: 3/5 — This is a 460V primary circuit. Always shut off and lock out/tag out the disconnect before opening the panel. Tools needed: flat-head and Phillips screwdrivers, wire stripper, multimeter. Confirm primary voltage at the transformer terminals before energizing. Licensed technician strongly recommended on 460V commercial equipment.
Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model TCHC2550HECMRAP601 commercial HVAC equipment requiring a 460V primary / 24V secondary, 75VA control transformer. Always verify your unit's nameplate voltage before ordering. Have a question about fitment? Our parts team confirms compatibility before you buy — reach out today.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $99
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Carrier Transformer 460V–24V...

$70.20

Frequently Asked Questions

Does this Transformer fit my Carrier TCHC2550HECMRAP601?

Yes. This is the factory-specified OEM transformer for the Carrier TCHC2550HECMRAP601. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the transformer on my Carrier TCHC2550HECMRAP601?

Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Photo wiring connections. Step 3: Disconnect wires from old transformer. Step 4: Remove mounting hardware. Step 5: Install new transformer, reconnect wires matching voltage ratings. Step 6: Verify 24V output with multimeter.

My thermostat has no power. What failed?

Thermostat with no display = failed 24V transformer (or blown control board fuse). Check the 3A/5A fuse on the control board first ($1–$5 fix). If fuse is good but no 24V output from transformer, replace transformer.

Is this transformer compatible with Bryant or Payne too?

Many Carrier parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Carrier transformer?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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OEM Carrier Transformer 460V–24V 75VA for TCHC2550HECMRAP601

OEM Carrier Control Transformer 460V–24V 75VA — HT01BD702 for Model TCHC2550HECMRAP601

Shipping Information

Return Policy

Frequently Asked Questions