
CD40-3X370-370-440 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $11.88 | Condition is New, Supco CD40/5X440 Capacitor 40+5 MFD 440V, FREE SHIPPING | ![]() |
![]() | $7.25 | Condition is New, SUPCO CD40+10X440R ROUND DUAL RUN CAPACITOR (40+10 MFD X 440VAC), shipping cost = $5.25 | 99.5% |
![]() | $12.05 | Condition is New, CD40+5x440 - Oval Motor Dual Capacitor 40+5 uf MFD 440 VAC Volt Fits Supco, FREE SHIPPING | ![]() |
![]() | $12.99 | Condition is New, Round Motor Dual Capacitor 40+5 uf MFD 440 VAC Volt Replaces Supco CD40+5X440, FREE SHIPPING | ![]() |
![]() | $8.99 | Condition is New, SUPCO CD40+7.5X440R ROUND DUAL RUN CAPACITOR (40+7.5 MFD X 440VAC), shipping cost = $5.75 | 99.5% |
![]() | $13.25 | Condition is New, Supco CD40+4X440R HVAC Motor Round Dual Run Capacitor 40 + 4 MFD 440 Volts, FREE SHIPPING | ![]() |
![]() | $13.88 | Condition is New, Supco CD40+7.5x440R Capacitor 40+7.5 MFD 440/370V Round, FREE SHIPPING | ![]() |
![]() | $13.90 | Condition is New, CD40+3X440 - NEW Supco Oval Motor Dual Capacitor 40+3 uf MFD 440 VAC Volt, FREE SHIPPING | ![]() |
![]() | $13.97 | Condition is New, CD40+5x370 - Oval Motor Dual Capacitor 40+5 uf MFD 370 440 VAC Volt Fits Supco, FREE SHIPPING | ![]() |
![]() | $13.99 | Condition is New, Supco Universal Oval Motor Dual Capacitor 40+4 uf MFD 370 VAC Volt CD40+4x370, FREE SHIPPING | ![]() |
![]() | $14.00 | Condition is New, SUPCO CD40+10X370R HVAC Round Fan Motor Run Capacitor 40 + 10 MFD/UF 370 Volts, FREE SHIPPING | ![]() |
![]() | $14.49 | Condition is New, Supco Universal Oval Motor Dual Capacitor 40+3 uf MFD 440 VAC Volt CD40+3x440, FREE SHIPPING | ![]() |
![]() | $14.90 | Condition is New, Supco CD40+6X440R HVAC Motor Round Dual Run Capacitor 40 + 6 MFD 440 Volts, FREE SHIPPING | ![]() |
![]() | $15.29 | Top Pick! Condition is New, Dual Oval Run Capacitor CD40+5X370 370VAC Supco OEM-Compatible, FREE SHIPPING | 99.4% |
![]() | $15.49 | Condition is New, CD40+3X370 - NEW Supco Oval Motor Dual Capacitor 40+3 uf MFD 370 440 VAC Volt, FREE SHIPPING | ![]() |
![]() | $15.50 | Condition is New, Supco CD40+3X440R HVAC Motor Round Dual Run Capacitor 40 + 3 MFD 440 Volts, FREE SHIPPING | ![]() |
![]() | $15.90 | Condition is New, Supco Universal Oval Motor Dual Capacitor 40+5 uf MFD 370 VAC Volt CD40+5x370, FREE SHIPPING | ![]() |
![]() | $16.57 | Top Pick! Condition is New, Dual Round Run Capacitor Supco CD40+5X370R 40 + 5 MFD 370 VAC, FREE SHIPPING | 99.4% |
![]() | $18.34 | Top Pick! Condition is New, Dual Oval Run Capacitor Supco CD40+5X440 40 + 5 MFD 440/370 VAC, FREE SHIPPING | 99.4% |
![]() | $10.99 | Condition is New, CD40+5 Oval Capacitor Supco, shipping cost = $10.95 | 100.0% |
![]() | $20.60 | Condition is New, SUPCO CD40+5X440R Dual Motor Run Capacitor, Round, 40 + 5 Mfd x 440V, 2.00" Diam, FREE SHIPPING | 99.0% |
![]() | $20.75 | Condition is New, Supco CD40+5X440 Oval Run Capacitor, FREE SHIPPING | 99.2% |
![]() | $11.99 | Condition is New, CD40+5 Round Capacitor Supco, shipping cost = $10.95 | 100.0% |
![]() | $15.67 | Condition is New, 1pc Supco CD40+4X440R HVAC Motor Round Dual Run Capacitor 40 + 4 MFD 440 Vo, shipping cost = $7.95 | 99.5% |
![]() | $17.68 | Condition is New, 1pc Supco CD40+10X370R HVAC Motor Round Dual Run Capacitor 40 + 10 MFD 370, shipping cost = $7.95 | 99.5% |
![]() | $24.74 | Condition is New, CD40+10X370 - NEW Supco Oval Motor Dual Capacitor 40+10 uf MFD 370 440 VAC Volt, FREE SHIPPING | ![]() |
![]() | $24.74 | Condition is New, CD40+10X440 - NEW Supco Oval Motor Dual Capacitor 40+10 uf MFD 440 VAC Volt, FREE SHIPPING | ![]() |
![]() | $42.99 | Condition is New, LOT OF 5 SUPCO CD40+7.5X440R ROUND DUAL RUN CAPACITOR 1, shipping cost = $3.99 | 99.7% |
![]() | $46.71 | Top Pick! Condition is New, Qty 5. Supco CD40+3X440R HVAC Motor Round Dual Run Capacitor 40 + 3 MFD 440 Volt, FREE SHIPPING | 100.0% |
![]() | $55.00 | Condition is New, LOT OF 5 Supco Run Capacitor ROUND1 CD40+5 x 440R---NICE --, FREE SHIPPING | 99.5% |
![]() | $59.00 | Condition is New, Supco Round Dual Motor Run Capacitor 40 + 5 MFD 440/370 5 Pack, shipping cost = $12.95 | 100.0% |
![]() | $59.00 | Condition is New, Supco Round Dual Motor Run Capacitor 60 + 5 MFD 440/370 5 Pack, shipping cost = $12.95 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $10.00 | Condition is Used, Supco Unit Parts Run Capacitor Oval Dual Mfd Volt CD35 +5 440 85 Degrees Celsius, shipping cost = $10.00 | 100.0% |
![]() | $10.00 | Top Pick! Condition is Used, Supco Unit Parts Run Capacitor Oval Dual Mfd Volt CD35 +5 440 85 Degrees Celsius, shipping cost = $10.00 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $9.99 | Condition is New – Open box, Supco CD40+5X440R HVAC Motor Round Dual Run Capacitor, shipping cost = $6.49 | 100.0% |
![]() | $9.99 | Condition is New – Open box, Pack of 1 - Supco CD40+5X370 Oval, 40 + 5 Mfd., 370 Volt, Dual Run Capacitor x, shipping cost = $6.58 | 100.0% |
![]() | $13.00 | Condition is New – Open box, Supco CD30+5X440R HVAC Motor Round Dual Run Capacitor 30+5 MFD 440/370 Volts, shipping cost = $6.58 | 100.0% |
![]() | $10.00 | Condition is New – Open box, Supco Run Capacitor ROUND CD40+5 x 440R, shipping cost = $10.60 | 100.0% |
![]() | $55.00 | Condition is New – Open box, Supco Run Capacitors 3/CD40+5x440R 1/CD 45+5x440R 1/CD30+5x440, shipping cost = $6.88 | 100.0% |

The SUPCO CD40 3x370 is a high-performance capacitor designed for use in various industrial applications. This dual capacitor is rated for both 370 Volt and 440 Volt systems, making it a versatile option for a wide range of motor start and control applications.
The capacitor boasts a capacitance of 40 microfarads (MFD), which provides ample energy storage for motor starts and helps ensure smooth and efficient motor operation. The electrolytic capacitor is constructed using premium quality aluminum electrolyte and high-purity aluminum foil, ensuring excellent electrical performance and long-term reliability.
The SUPCO CD40 3x370 is a three-terminal capacitor, with one terminal serving as the positive terminal (marked with a symbol), and two terminals serving as the negative terminals (marked with - symbols). The capacitor is designed with a rugged construction, featuring a robust epoxy resin case that provides excellent protection against moisture, vibrations, and other environmental stressors.
The capacitor's dual voltage rating makes it an ideal choice for motor control circuits that operate on both 370 Volt and 440 Volt systems. It is also equipped with two sets of capacitor plates, each set designed for a specific voltage range, ensuring optimal performance and energy efficiency under different operating conditions.
The SUPCO CD40 3x370 is also outfitted with high-quality dual motor run capacitors, which provide the necessary energy boost to help motors start smoothly and efficiently. The capacitor's low Equivalent Series Resistance (ESR) and high Ripple Current (RC) rating ensure that the motor receives a consistent supply of power during start-up and operation.
This capacitor is designed to meet or exceed the requirements of various industrial standards, including UL, CSA, and CE. It is also RoHS compliant, ensuring that it is free of harmful substances such as lead, mercury, cadmium, and hexavalent chromium.
In summary, the SUPCO CD40 3x370 is a high-quality, dual voltage capacitor designed for use in industrial motor control applications. Its durable construction, premium quality materials, and excellent electrical performance make it an ideal choice for applications that require smooth and efficient motor operation.
The SUPCO CD40 3x370 is a 3-phase, 400V/370V capacitor bank designed for use in motor applications. Here are some pros and cons to help you make an informed decision about purchasing this capacitor bank:
Pros:1. High Voltage and Capacitance: The SUPCO CD40 3x370 provides a high voltage rating of 370V and a capacitance of 40 microfarads per unit, making it suitable for use in industrial applications with high power motors.
2. Dual Voltage: The dual voltage rating of the capacitor bank (370V and 440V) makes it versatile and adaptable to different motor applications.
3. Molded Case: The capacitor bank comes in a molded case design, which provides better protection against external impacts and environmental conditions.
4. Energy Efficiency: The use of capacitor banks in motor applications can lead to energy savings by reducing the motor's starting current and improving its power factor.
Cons:1. Cost: The SUPCO CD40 3x370 is a high-performance capacitor bank, and its price reflects the advanced technology and capabilities it offers.
2. Size and Weight: The capacitor bank is relatively large and heavy, which can increase transportation and installation costs.
3. Complex Installation: Installing a capacitor bank like the SUPCO CD40 3x370 requires specialized knowledge and expertise, which may add to the overall cost of the project.
Ending Conclusion:The SUPCO CD40 3x370 is a high-quality capacitor bank with advanced features that make it suitable for use in industrial motor applications. While it comes with a higher cost and complex installation requirements, the energy efficiency and versatility it offers can make it a worthwhile investment for businesses that rely on high power motors.
Recommendation:If you are looking for a reliable and efficient capacitor bank to improve the performance and energy efficiency of your industrial motors, the SUPCO CD40 3x370 is a strong consideration. However, it is crucial to weigh the benefits against the costs and ensure that you have the necessary expertise and resources to properly install and maintain the capacitor bank. Consulting with a professional electrical engineer or capacitor supplier can help you make an informed decision.
Details:
The CD40 3x370 is a new Supco oval motor dual capacitor specifically designed for central furnaces. Designed for compatibility and performance, this motor capacitor is a crucial component maintaining improving the efficiency of central furnaces. With a capacity of 40 3 uf and rated for 370 440 vac, this motor capacitor is reliable efficient component heating systems.
specifications centrafurn:
- brand: Supco
- mpn: Cd40
- model: Cd40 3 X370
- type: Central Furnace
- heating system: Motor
shipping centrafurn:
- service: usps ground advantage
- transit: 3-10 days
- carrier: usps
- class: standard
- type: fixed
seller centrafurn:
- rating: 100.0%
- # reviews: 652
- city: vienna, virginia
offer centrafurn:
- prices: $7.25–$59.00
- item condition:
- New
- Used
- New – Open box
- best offers: true
- in stock #: 5
- availability: in stock
- sold #: 23
- options: ship-to-home
- started: november 5, 2025
general centrafurn:
- category: Home & Garden > Heating, Air > Cooling Systems > Central Furnaces
returns centrafurn:
- policy: no returns
payments centrafurn:
- credit card: mastercard
- wallet: paypal
- other
Also Available:
- SSN0145: FURNACE, Supco
- CD25-3X370-POCD4515-25-3: MOTOR CAPACITOR, Fits Supco
- SM3404: INDUCER FURNACE FAN MOTOR, Supco
- IG1100: IGNITOR KIT, Supco
- 4JJ0535: MOTOR CAPACITOR, Fits Diversitech Supco







































