What are the specs for this Transformer?

The correct replacement for Carrier model C50A406061 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 C50A406061.

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 40VA 120V/24V for C50A406061

Name: OEM Carrier Transformer 40VA 120V/24V for C50A406061
Brand: Carrier
SKU: CARRIE-C50A406061-TRANSFORMER-HT01BD236
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-C50A406061-TRANSFORMER-HT01BD236 Brand: Carrier

✓ Guaranteed to fit C50A406061 — or your money back. Terms

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OEM Carrier 40VA Control Transformer for Model C50A406061

This OEM Carrier transformer (part# HT01BD236) is the factory-specified replacement for the C50A406061 commercial packaged rooftop unit. The transformer steps down 120V line voltage to the 24V AC signal that powers every component in the control circuit — thermostat, contactor coils, gas valve, and control board. When the transformer fails, nothing responds: the thermostat goes blank, the unit won't cycle, and no call for heating or cooling is answered. It is one of the first components to check when an entire system goes dead with no obvious cause.

Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched impedance and thermal overload protection
OEM vs Generic: OEM transformers are wound to exact factory VA and voltage tolerances. Undersized or off-tolerance generic units can overheat under full control-circuit load, tripping the internal breaker repeatedly or failing prematurely — especially on commercial rooftop equipment with multiple control loads.
Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching terminals). Photograph or label wiring before disconnecting. Replace any blown fuse on the secondary side at the same time.
Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier C50A406061 commercial packaged rooftop unit. Verify primary voltage (120V) and VA rating (40VA) on your unit's data plate before ordering. If you are unsure of fitment, our HVAC parts team will confirm compatibility before your order ships — same day, no hassle.

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 40VA 120...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier C50A406061?

Yes. This is the factory-specified OEM transformer for the Carrier C50A406061. 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 C50A406061?

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 40VA 120V/24V for C50A406061

OEM Carrier 40VA Control Transformer for Model C50A406061

Shipping Information

Return Policy

Frequently Asked Questions