--- product_id: 42420116 title: "40 + 5 MFD uf 370 VAC or 440 Volt Dual Run Round Capacitor PW-40/5/R for Condenser Straight Cool or Heat Pump Air Conditioner 40/5 Micro Farad" brand: "powerwell" price: "$49.03" currency: USD in_stock: true reviews_count: 10 url: https://www.desertcart.ec/products/42420116-40-5-mfd-uf-370-vac-or-440-volt-dual store_origin: EC region: Ecuador --- # 40+5 µF dual capacitance 440V max operating voltage Built to USA EIA-456-A & IEC standards 40 + 5 MFD uf 370 VAC or 440 Volt Dual Run Round Capacitor PW-40/5/R for Condenser Straight Cool or Heat Pump Air Conditioner 40/5 Micro Farad **Brand:** powerwell **Price:** $49.03 **Availability:** ✅ In Stock ## Summary > ⚡ Power your cool with precision and durability! ## Quick Answers - **What is this?** 40 + 5 MFD uf 370 VAC or 440 Volt Dual Run Round Capacitor PW-40/5/R for Condenser Straight Cool or Heat Pump Air Conditioner 40/5 Micro Farad by powerwell - **How much does it cost?** $49.03 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/42420116-40-5-mfd-uf-370-vac-or-440-volt-dual) ## Best For - powerwell enthusiasts ## Why This Product - Trusted powerwell brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Power Boost:** Supports both fan & compressor motors seamlessly for peak A/C efficiency - • **Rugged USA Quality:** Manufactured under strict quality control with EIA-456-A & IEC 60252-1:2001 certifications - • **Snap-In Convenience:** Easy installation with secure snap-in mount—no hassle, just reliable performance - • **Compact & Space-Smart:** 2" diameter x 5.25" tall round design fits most condenser units effortlessly - • **Universal Voltage Upgrade:** 440V rating replaces 370V capacitors for longer life & superior durability ## Overview The PowerWell PW-40/5/440 is a premium dual run round capacitor designed for condenser and heat pump A/C units, offering 40+5 microfarads capacitance at a robust 440 volts. Engineered to exceed USA EIA-456-A and IEC 60252-1:2001 standards, it replaces both 370V and 440V capacitors, ensuring longer motor life and enhanced efficiency. Its compact 2"x5.25" form factor and snap-in mount make it a perfect, hassle-free upgrade for professional-grade HVAC maintenance. ## Description A capacitor is an electric component that temporarily stores an electrical charge. A dual "run capacitor" supports two electric motors, such as a fan motor and a compressor. Round dual run capacitors are used to start and run the unit more efficient. It saves space by combining two physical capacitors into one case. The dual capacitor has three terminals labeled "C", "FAN", and "HERM", which stand for the *C*ommon, Fan, and *HERM*etically sealed compressor. Dual capacitors come in a variety of sizes, depending on the capacitance (µF = MFD = micro farad), such as 60 plus 5 µF, and also the voltage. A 440 volt capacitor can be used in place of a 370 volt, as it is build better, but the 370 can’t be used in place of a 440 volt. It will work for a while and will fail prematurely, as exceeding the capacitor's rated voltage will cause the dielectric to break down and the capacitor to short out. Same as an electric wire- 600V rated wire is better than 300V one .The capacitance(µF or MFD or micro farad) must be the same or stay within 10%+ or 5%- of its original value . Example: 40 µF cap can be substituted by 38 - 44 MFD with the same or better voltage ratings capacitor. If your fan is working but compressor not, or the capacitor is bulged on top most likely your capacitor is defective. Round capacitor can be used to substitute oval shape one with the same MFD AND Volt specs. You will ask “Why I need a Cap that is rated 440V in my A/C?” Answer: You need to realize that a motor is an inductive device. When the supply voltage is applied to the motor run winding, the voltage across the start winding will be increased to a higher voltage value. A motor acts like a transformer with the run winding acting as the primary and the start winding acting as the secondary. This is why the capacitor has a much higher voltage rating than the 230 being the supply voltage. If a Capacitor is not EIA-456-A approved means it is NOT approved for USA market. ## Features - 40/5 uf or 40/5 MFD micro farad 440 Volt Dual Run Round AC Capacitor . Replaces BOTH 370 & 440 VAC capacitors - Can size measures 2" diameter x 5-1/4" tall. Operating temperature range -40 C. to +70 C/ -40F to 158F - Built to the TOUGHEST USA standards for AC motor run capacitors including EIA-456-A and IEC 60252-1:2001 - We are extremely passionate about our products and are fanatical about quality control in our workshops. ORDER NOW with peace of mind. No Catches - Replacement for 97F9838 , Z97F938 , 97F9838BZ3 , 12786 , RC0108 , 97F9849 , C3DR405 , Z97F9848BZ2 , P291-4054RS , C3405R , HCKS400D050R440Z , P291-4053RS , TT-CAP-40/5/440R , TRCFD405 , TP-CAP-40/5/440R , HC98JA041 , HC98CA040 , HC98CA041 , HC93CZ035 ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B072HM7Z27 | | Best Sellers Rank | #26,833 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #178 in Industrial Electrical Capacitors | | Brand Name | PowerWell | | Capacitance | 40 microfarad | | Customer Reviews | 4.7 4.7 out of 5 stars (2,160) 4.7 out of 5 stars | | Item Dimensions W X H | 5.25"W x 2"H | | Item Shape | Round | | Manufacturer | PowerWell | | Material Type | Copper | | Maximum Storage Temperature | 71 °C | | Maximum Voltage | 440 volts | | Model | PW-40/5/440 | | Mounting Type | Snap-In Mount | | Number Of Items | 1 | | Number Of Packs | 1 | | Operating Voltage | 440 volts | | Part Number | PW-40/5/440 | | Upc | 817506023019 | | Upper Temperature Rating | 70 °C | ## Product Details - **Brand:** PowerWell - **Capacitance:** 40 microfarad - **Material:** Copper - **Maximum Storage Temperature:** 71 °C - **Shape:** Round ## Images ![40 + 5 MFD uf 370 VAC or 440 Volt Dual Run Round Capacitor PW-40/5/R for Condenser Straight Cool or Heat Pump Air Conditioner 40/5 Micro Farad - Image 1](https://m.media-amazon.com/images/I/61jFKBkht0L.jpg) ![40 + 5 MFD uf 370 VAC or 440 Volt Dual Run Round Capacitor PW-40/5/R for Condenser Straight Cool or Heat Pump Air Conditioner 40/5 Micro Farad - Image 2](https://m.media-amazon.com/images/I/41qmm9kk7ML.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked great *by on Reviewed in the United States May 4, 2026* Exact fit and replacement. Put in hvac unit and it started right up ### ⭐⭐⭐⭐⭐ Great price & it works! Save some cash think ahead. *by on Reviewed in the United States March 13, 2021* Buying through a repairman will cost you 3x more atleast. If you have an AC / SPA, best open compressor housing/ SPA morot cap cover and note values. Most have 2 for AC & just one for spa, a 5 mfd for starting the fan motor and a 40, 50 or 60 etc. for the compressor. Having a spare in the garage can save hundreds of dollars and keep the wife happy if you swap it out and get ac up and running fast. Always kill power from breaker then short common to each of the other leads before touching or removing wires. Very Important!!! Note which color wires go to HERM etc. on the cap, before removal. You don't want to put them on the wrong side! When compressor fan stops working turn off ac immediately to prevent burning out the fan motor or compressor. If you know what to listen for, you can hear the fan running when ac starts up, if it isn't running the cap is probably bad. Alternatively if it is running and ait is hot could be compressor side of cap. I have replaced my AC cap 3x in the last 17 years and my contactor once, but after 20 years the AC is still humming. I used this cap as a temp meaure for my spa pump until the 40mfd caps came in (delayed availability). Worked great and installed the correct one when it arrived 2 weeks later. Did not need the 5 mfd side for spa pump. Now have a spare 40+5. ### ⭐⭐⭐⭐⭐ Save yourself hundreds you can do this *by on Reviewed in the United States May 21, 2023* Its a easy task to do yourself and save yourself hundreds. Capacitors can fail for many reasons , very easy to replace *****Please use extreme caution if you do this yourself, a capacitor MUST BE DISCHARGED..!!FIRST pull your air conditioner breaker outside and or turn off the breaker inside your breaker boxRemove your AC access cover ..NOW VERY IMPORTANT check with a multimeter set to read VOLTAGE to make sure there is 0 voltage going to your AC unit THOSE THICK WIRES SHOULD "READ ZERO VOLTS" COMING INTO THE CONTACTOR ..Discharge your capacitor by using a VERY INSULATED screwdriver and jumping all the terminals together...Common, Herm, & Fan.. Make note of where the wires are on the original Capacitor or take some pictures.. IF YOU CANT SEE THE MARKINGS ON THE OLD CAP :MOST CAPS WILL HAVE 4 TERMINALS FOR COMMON, 3 FOR HERM , 1 FOR FAN.. remove wires from old cap one by one and install on your new Capacitor. Put everything back turn your power back on and you should be good to go.... ## Frequently Bought Together - PowerWell 40 + 5 MFD uf 370 VAC or 440 Volt Dual Run Round Capacitor PW-40/5/R for Condenser Straight Cool or Heat Pump Air Conditioner 40/5 Micro Farad - VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool - PowerWell 45+5 MFD 45/5 uf 370 or 440 Volt Dual Run Round Capacitor PW-45/5/R for Condenser Straight Cool or Heat Pump Air Conditioner - Guaranteed to Last 5 Years --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ec/products/42420116-40-5-mfd-uf-370-vac-or-440-volt-dual](https://www.desertcart.ec/products/42420116-40-5-mfd-uf-370-vac-or-440-volt-dual) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-08-16*