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.
Verified Customer

4.9/5 based on 4750 reviews

Trane CTR03021 – OEM Definite Purpose Contactor | 2-Pole | 24V | 40A

Trane CTR03021 – OEM Definite Purpose Contactor | 2-Pole | 24V | 40A

15 in stock

Regular price $39.99 USD
Regular price Sale price $39.99 USD
Sale Sold out
Shipping calculated at checkout.

High-Level Highlights:

  • Genuine OEM Quality: Authentic Trane replacement ensures factory-spec current handling and reliable contact closure.

  • 2-Pole 30A Design: Robust construction handles standard residential HVAC loads effectively.

  • High Durability: Features heavy-duty contacts designed for a long mechanical and electrical life.

  • Flexible Wiring: Features versatile box lug and quick-connect terminations for fast and secure electrical installation.

  • Standard Replacement: A common, reliable part used across a wide range of Trane/American Standard systems.

Please visit our store for pick up.

Quantity

safe & secure Checkout

Fast & Tracked Delivery
30 Day money back guarantee

Specifications

Product Details and Key Specifications:

  • Part Number: CTR03021
  • Catalog #: N/A (Part number serves as catalog ID)
  • Manufacturer: Trane / American Standard
  • Part Type: Definite Purpose Contactor
  • Poles: 2-Pole
  • Coil Voltage: 24 VAC
  • Full Load Amps (FLA): 30A
  • Resistive Amps (RES): 40A
  • Switching Voltage: Up to 600 VAC
  • Terminal Connection: Lug or Quick Connect
  • Gross Shipping Weight: 0.7 LB 

description

Trane P/N CTR03021 – Genuine OEM Definite Purpose Contactor (2-Pole, 24V, 40A)

The Trane CTR03021 is a Genuine Original Equipment Manufacturer (OEM) definite purpose contactor, primarily used in Trane and American Standard air conditioning and heat pump systems. This heavy-duty 2-pole contactor is engineered to manage the high-current electrical loads of compressors and fan motors, ensuring reliable system start-ups and operation. Choosing an authentic Trane replacement ensures the exact electrical ratings and mounting compatibility required by your HVAC unit, preventing premature component failure or safety hazards common with lower-quality generic alternatives. 

Being an authentic OEM component, the CTR03021 features high-grade electrical contacts and a durable housing designed for superior heat resistance and electrical conductivity. This specific model is a standard replacement part, providing a stable 24V control circuit for single-phase equipment. Installing the original factory part maintains the system's UL/CSA certifications and ensures compliance with factory-spec safety protocols.

Key Features and Function:

  • Definite Purpose Design: Optimized specifically for HVAC and refrigeration systems with a focus on durability and high cycle life.
  • Genuine OEM Reliability: Official Trane replacement built to factory standards for exact fitment and long-term durability.
  • Enhanced Contact Life: High-grade contacts resist pitting and welding under heavy electrical loads.
  • Standard Mounting: Features a universal foot-mounting base that allows for easy replacement in most 2-pole applications. 

Product Details and Key Specifications:

  • Part Number: CTR03021
  • Catalog #: N/A (Part number serves as catalog ID)
  • Manufacturer: Trane / American Standard
  • Part Type: Definite Purpose Contactor
  • Poles: 2-Pole
  • Coil Voltage: 24 VAC
  • Full Load Amps (FLA): 40A
  • Resistive Amps (RES): 40A
  • Switching Voltage: Up to 600 VAC
  • Terminal Connection: Lug or Quick Connect
  • Gross Shipping Weight: 0.7 LB 

🛠️ HVAC Depot Pro Tip: The "Pitting and Buzzing" Test

Over time, the high-voltage contacts inside your CTR03021 will begin to "pit" or develop carbon buildup from electrical arcing. If you hear a loud "buzzing" or "chattering" sound when the unit calls for cooling, or if your outdoor fan runs but the compressor won't start, the contactor is likely failing. Even if the coil tests fine with a multimeter, excessive pitting creates high resistance that can overheat and destroy your compressor. Always replace a noisy or burnt contactor immediately to avoid a much more expensive repair. 

Cross-Reference:

The CTR03021 is a direct OEM replacement for the following part numbers:

  • OEM & Catalog Numbers: CTR03021, CNT03021, HW20AA107, 3021.
  • Brand Specific Replacements: Honeywell DP2030A5002, Supco DP30242, Mars 33234. 

Extensive Model Compatibility List:

Note: Use 'CTRL+F' to search for your specific model:

  • Trane/American Standard AC and HP Units (Specific Models):
  • 4TTA3030A1000AA, 4TTA3036A1000AA, 4TTA4030A1000AA, 4TTA4036A1000AA
  • 2TTA3F36A1000AA, 2TTB3F36A1000AA
  • 4TWB3030A1000AA, 4TWB3036A1000AA

 

Specification

Refund policy

Our refund and returns policy lasts 30 days. If 30 days have passed since your purchase, we can’t offer you a full refund or exchange. Please note there will be a 20% Re-stocking fee of product price.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Model and serial number must match what is on the invoice and correct box information.
Exclusions:
•    Part with obvious signs of use of installation.
•    Original box was destroyed or could not be located by purchaser.
•    Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
•    Any item that is returned more than 30 days after delivery
Part installation
HVAC Parts and Equipment Depot recommend this parts will be installed by a licensed professional contractor. HVAC Parts and Equipment Depot assumes no liability for any injuries or damages arising from the user information or products. 
Sale items
Only regular priced items may be refunded. Sale items cannot be refunded. Special Order items cannot be refunded. 
Exchanges
We only replace items if they are defective or damaged from Manufactory. If you need to exchange it for the same item, send us an email at hvacpartsstore@gmail.com and send your item to: HVAC Parts & Equipment Depot 1135 E Plano Parkway Suite 8 Plano Tx 75189.
Refunds
To complete your return, we require a receipt or proof of purchase within 30 days or less.
Once your return is received and inspected by management team, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 7-14 Business days. HVAC Parts and Equipment Depot or its employees are not responsible for damaged items from manufactory.
Shipping returns
To return your product, you should mail your product to:
HVAC Parts & Equipment Depot
1135 E Plano Parkway Suite 8 Plano Tx 75074.
Customer will be responsible for paying for shipping. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you may vary.
If you are returning more expensive items, you may consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item without a valid tracking number provided by your choice of delivery method.
Late or missing refunds
If you haven’t received a refund yet, first check your bank account again. This process takes approximately 7-14 business days depending on your Bank.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at hvacpartsstore@gmail.com
Special Orders
Special orders should be picked up within 30 Days of purchase day. Your items will be considered abandoned and will be returned to manufacturer. There will be a 100% Re-stocking fee for abandoned items. 

Need help?
Contact us via email hvacpartsstore@gmail.com or Phone 214-734-5222 for questions related to refunds and returns.
Thank you for choosing HVAC Parts & Equipment Depot.

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.
Verified Customer
View full details

Happy Shouts From Our Thrilled Customers

YOU MAY ALSO LIKE

Explore More Products

HVAC Parts and Equipment Depot

Frequently Asked Questions

Questions? We’ve got you covered

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

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

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

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

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.

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

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

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