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Michel & Siso are very knowledgeable and explain everything to where I could understand! Amazing experience! Thank you will always come here for any AC needs. Trustworthy and excellent customer service.

Celest G.

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4.9/5 based on 4750 reviews

Trane Service First SFCAP40D5440R Dual Run Capacitor 40+5 MFD 440V Round

Name: Trane Service First SFCAP40D5440R Dual Run Capacitor 40+5 MFD 440V Round
Brand: HVAC Depot
SKU: SFCAP40D5440R
Price: 39.99 USD
Availability: InStock

Low stock: 6 left

$39.99 USD

Sale Sold out

Shipping calculated at checkout.

Quick Features & Highlights

Restores Starting Torque: Ensures the compressor receives the necessary electrical boost to start under high head pressure.
Eliminates System Humming: Resolves the common electrical "buzzing" or humming sound associated with a failed run capacitor.
Enhances Efficiency: Maintains stable microfarad output to help the system reach its rated SEER efficiency.
Direct OEM Replacement: Eliminates the guesswork associated with "universal" capacitors that may have different height or diameter specs.
Prevents Motor Overheating: By providing a clean phase shift, it keeps motor operating temperatures within safe factory limits.

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Specifications

Product Details:

Brand: Service First / Trane / American Standard
Manufacturer: Trane Technologies
Part #: SFCAP40D5440R
Shipping Weight: 1.72 lbs
Voltage: 440 VAC (Compatible with 370 VAC systems)
Capacitance: 40 + 5 MFD (Microfarads)
Type: Dual Run capacitor
Shape: Round
Frequency: 50/60 Hz
Tolerance: +/- 5%

description

Trane Service First SFCAP40D5440R Dual Run Capacitor 40+5 MFD 440V Round

This genuine Service First SFCAP40D5440R is the factory-authorized OEM replacement part engineered to serve as the electrical "brain" and primary power reservoir for your condensing unit. Acting as a dual-run component, it provides the critical phase-shift and starting torque required by both the compressor and the condenser fan motor. Designed specifically for Trane and American Standard furnace and AC series, this capacitor ensures the system maintains precise microfarad levels to protect motor windings. Without this high-performance component, the system cannot achieve the synchronized rotation necessary for cooling, making it the most vital electrical link in your outdoor assembly.

Key Features:

OEM Precision Engineering: The SFCAP40D5440R is a certified Service First part, ensuring exact capacitance matching for Trane and American Standard equipment.
Dual-Component Management: Features a 40+5 MFD configuration that handles both the high-load compressor (HERM) and the fan motor (FAN) simultaneously.
Resolution of Start-Up Issues: Designed to fix specific humming noises, "hard-starting" compressors, and fan motor lag caused by weakened legacy capacitors.
Advanced Safety Interrupter: Includes an internal pressure-sensitive safety mechanism that disconnects the capacitor in the event of an electrical surge to prevent casing rupture.
High-Heat Durability: Encased in a rugged, oil-filled aluminum housing rated for 440V to withstand extreme cabinet temperatures and voltage fluctuations.

Product Details:

Brand: Service First / Trane / American Standard
Manufacturer: Trane Technologies
Part #: SFCAP40D5440R
Shipping Weight: 1.72 lbs
Voltage: 440 VAC (Compatible with 370 VAC systems)
Capacitance: 40 + 5 MFD (Microfarads)
Type: Dual Run capacitor
Shape: Round
Frequency: 50/60 Hz
Tolerance: +/- 5%

🛠️ HVAC Depot Pro Tip:

Safety is the first priority when handling electrical storage components. Always disconnect the main power at the outdoor disconnect box and discharge the old capacitor by shorting the terminals with an insulated-handle screwdriver. Take a Picture First of the original wiring configuration—paying close attention to the colors connected to the C (Common), HERM, and FAN terminals. During your diagnostic check, ensure the mounting strap is tightened securely to prevent vibration, which can lead to premature terminal fatigue or wire disconnection.

Cross-Reference:

Superseded/Legacy:
CPT00668, CPT0668, CPT02115, CPT2115, CPT-0668
Drawing/OEM Numbers:
97F9856, 97F9838, 80K4801, C3405R, C4405R, 22V5701
White-Rodgers/Emerson Equivalents:
97F9834, 97F9895

Model Compatibility:

4TTR (Suffixes: 3030A, 3036A, 4030A, 4036A, 6036B)
4TTB (Suffixes: 3030A, 3036A, 4030A, 4036A)
2TTR (Suffixes: 1030A, 2030A, 3030A, 3036A)
2TTB (Suffixes: 1030A, 2030A, 3030A)
4TWA (Suffixes: 3030A, 3036A, 3036B)
4TWX (Suffixes: 4030A, 4036A, 5030A)
4TWB (Suffixes: 3030A, 3036A)

Specification

Refund policy

Refund & Return Policy

Last Updated: June 2026

At HVAC Parts & Equipment Depot, customer satisfaction is important to us. This Refund & Return Policy explains how returns, exchanges, and refunds are handled for purchases made through TopHVACParts.com.

Return Eligibility

We accept returns within 30 days of delivery.

To qualify for a return:

The item must be unused, uninstalled, and in its original condition.
The item must be returned in its original packaging.
Model numbers and serial numbers must match the original purchase records.
Proof of purchase or order confirmation is required.

Non-Returnable Items

The following items are not eligible for return or refund:

Installed or used parts.
Products showing signs of installation, modification, or damage caused after delivery.
Items missing original packaging.
Sale or clearance items.
Special-order or custom-order products.
Returns requested more than 30 days after delivery.

Restocking Fee

Approved returns may be subject to a 20% restocking fee.

The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.

Damaged, Defective, or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.

Email: support@tophvacparts.com
Phone: (214) 734-5222

We may request photographs and additional information to help process your claim.

If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.

Exchanges

We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.

To request an exchange, contact us at:

support@tophvacparts.com

Refund Process

Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.

If approved:

Refunds will be issued to the original payment method.
Processing typically takes 7–14 business days after approval.
Your financial institution may require additional time before the refund appears in your account.

Return Shipping

Customers are responsible for return shipping costs unless the return is the result of:

Our shipping error,
A defective product,
A damaged product received upon delivery.

Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

Refund & Return Policy

Last Updated: June 2026

Return Eligibility

We accept returns within 30 days of delivery.

To qualify for a return:

The item must be unused, uninstalled, and in its original condition.
The item must be returned in its original packaging.
Model numbers and serial numbers must match the original purchase records.
Proof of purchase or order confirmation is required.

Non-Returnable Items

The following items are not eligible for return or refund:

Installed or used parts.
Products showing signs of installation, modification, or damage caused after delivery.
Items missing original packaging.
Sale or clearance items.
Special-order or custom-order products.
Returns requested more than 30 days after delivery.

Restocking Fee

Approved returns may be subject to a 20% restocking fee.

The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.

Damaged, Defective, or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.

Email: support@tophvacparts.com
Phone: (214) 734-5222

We may request photographs and additional information to help process your claim.

If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.

Exchanges

We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.

To request an exchange, contact us at:

support@tophvacparts.com

Refund Process

Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.

If approved:

Refunds will be issued to the original payment method.
Processing typically takes 7–14 business days after approval.
Your financial institution may require additional time before the refund appears in your account.

Return Shipping

Customers are responsible for return shipping costs unless the return is the result of:

Our shipping error,
A defective product,
A damaged product received upon delivery.

Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

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Happy Shouts From Our Thrilled Customers

William Bartlett

Cecil really saved me with troubleshooting tips over the phone. Thought I was going to have to replace the blower motor and ended up only needing a motor run capcitor. Thank you and God bless!

Verified Buyer

Riley Connolly

Cecil and Fidel were absolutely amazing and so helpful. We were happy they were open on Sunday, but was impressed with their knowledge and willingness to make sure we had everything we needed. If you need parts or service or install, I would recommend.

Verified Buyer

Cole Meger

Our AC went out during the hottest stretch of summer, and with a one-year-old at home, we were desperate for a quick fix. These guys came through big time — not only did they source the part faster than anyone else in the area, they also walked me through DIY troubleshooting while I waited. Trustworthy, knowledgeable, and run by a solid local family. As someone who owns rental properties nearby, I’ll be sourcing all my HVAC parts from them moving forward. Highly recommend!

Verified Buyer

Carl T. Droste

Had a power outage last night and during the 100 degree heat today noticed that the AC was not blowing any cold air. Pulled the capacitors to have them checked and also took video of the relay making noise even with the breaker was off. The proprietor and her staff were very friendly and helpful. She had the video analyzed and confirmed something was wrong. She checked one of the capacitors was a little low. Capacitor replacement is the biggest ticket item for HVAC repair. It is hundreds of dollars with the a capacitor only about $20.

Verified Buyer

Fuzzy Wuzzy

Cecil and his family have been a life saver. I walked in with very little knowledge on parts let alone how to repair my unit. All I had was my brother in FL who knows more than I do and Cecil at HVAC Depot. With 2 young kids at home I couldn't afford to wait for a HVAC tech. Cecil walked me through what I needed to know, even after hours when the shop closed. I successfully repaired the fan motor and replaced the capacitor. Thank you HVAC team for being totally awesome. Prices were amazing and I'm forever going to support this small family business. You and your family are what Texas is all about!!!

Verified Buyer

Linda Robinson

I called HVAC Depot and was absolutely blown away by the fast, courteous and exceptional service. They were very knowledgeable about explaining what they were doing and what had happened to the ac system. If you ever need a HVAC team they are best and they won’t hesitate by coming out and they won’t leave until you are happy with the service. Thank you so much for your excellent service. Kudos to you Michelle for your amazing customer service.

Verified Buyer

Paul Hamer

My AC went out in our home on Friday night. I went out and got the capacitor details and took them here first thing Saturday morning. Lady at the counter was friendly and had the capacitor I needed! When I got home, I installed the capacitor and AC is all good!!

Verified Buyer

Jeff Ledesma

Awesome support and had everything I needed for an older unit! Then helped me out with the DIY!! Air conditioning back up and running at 100%!!
Thanks for everything

Verified Buyer

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Frequently Asked Questions

Questions? We’ve got you covered

Can anyone buy from your store, or do I need to be a licensed contractor?

We are open to the public! Homeowners, landlords, and DIYers are all welcome—no license required.

What kinds of HVAC parts do you sell?

We carry blower motors, fan motors, capacitors, control boards, contactors, thermostats, filters, copper lines, refrigerants, and more.

Do you sell parts for specific brands like Trane, Goodman, or Lennox?

Yes, we stock OEM and compatible replacement parts for major brands including Trane, Goodman, Lennox, Carrier, Rheem, and others.

Can you help me find the right part for my system?

Absolutely! Bring in the part, model number, or a picture, and our team will help match you with the correct replacement.

Do you offer returns or exchanges on parts?

Yes, we accept returns or exchanges within a set time period—just make sure the item is unused and in original packaging. Ask for specific terms at the counter.

Do you provide technical support or installation services?

While we don't install, we can answer basic questions and refer you to trusted local HVAC technicians if needed.

Do you sell refrigerants to the public?

We sell certain refrigerants, but EPA regulations require certification for purchase of products like R-410A or R-22.

Do you ship parts, or is it in-store only?

We offer both! You can shop in person or call to arrange shipping if you're out of town.

Trane Service First SFCAP40D5440R Dual Run Capacitor 40+5 MFD 440V Round