--- product_id: 51561238 title: "MAXRUN 40+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor for AC Air Conditioner Condenser - 40/5 uf MFD 440V Straight Cool or Heat Pump - Will Run AC Motor and Fan - 1 Year Warranty" brand: "maxrun capacitors" price: "Β£0.70" currency: GBP in_stock: false reviews_count: 7 url: https://www.desertcart.co.uk/products/51561238-maxrun-40-5-mfd-uf-370-or-440-volt-vac store_origin: GB region: United Kingdom --- # 40/5 MFD 370/440 Volt 10,000 AFC Safety MAXRUN 40+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor for AC Air Conditioner Condenser - 40/5 uf MFD 440V Straight Cool or Heat Pump - Will Run AC Motor and Fan - 1 Year Warranty **Brand:** maxrun capacitors **Price:** Β£0.70 **Availability:** ❌ Out of Stock ## Summary > πŸ”§ Upgrade Your Comfort with Confidence! ## Quick Answers - **What is this?** MAXRUN 40+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor for AC Air Conditioner Condenser - 40/5 uf MFD 440V Straight Cool or Heat Pump - Will Run AC Motor and Fan - 1 Year Warranty by maxrun capacitors - **How much does it cost?** Β£0.70 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/51561238-maxrun-40-5-mfd-uf-370-or-440-volt-vac) ## Best For - maxrun capacitors enthusiasts ## Why This Product - Trusted maxrun capacitors brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Safety First:** Equipped with a 10,000 AFC anti-explosion pressure switch for peace of mind. - β€’ **Easy Installation:** Quick and straightforward replacement processβ€”get back to comfort in no time! - β€’ **Dual Functionality:** Effortlessly powers both compressor and fan for optimal performance. - β€’ **Unmatched Longevity:** Engineered to last an impressive 60,000 hours, ensuring reliability. - β€’ **Versatile Compatibility:** Works seamlessly with both straight cool and heat pump systems. ## Overview The MAXRUN 40+5 MFD uf capacitor is a high-performance dual run capacitor designed for air conditioning systems, compatible with both 370 and 440 volts. Built to last 60,000 hours, it features advanced safety mechanisms and is easy to install, making it the ideal choice for reliable HVAC performance. ## Description SPECIFICATIONS FOR THE MAXRUN 40/5 MFD 370/440 VOLT CAPACITORThis Capacitor is rated for 440 Volts which means it will work at 370 or 440 VAC. A dual run capacitor, such as this 40/5, combines two capacitors into one unit. It will power a compressor motor and a fan motor, and has three terminals on the top. They are labeled "Herm" for the compressor motor, "Fan" for the fan, and "C" for the common line.The capacitor is 2" in diameter by 4.375" in height and will run from -40 C. to +70 C. It is safety rated at 10,000 AFC.Run Capacitors work hand in hand with Electric Motors that power the compressors and condensers that make air conditioning work. For this purpose, the Capacitor works the same way as a battery. It stores and releases a large charge very quickly. This released charge gives the motor the spin it needs to start and run correctly.As Air Conditioning Capacitors age, they lose their ability to hold a charge and get weaker.As the capacitor gets older, the motor may get louder and seem to run slower. If replaced before they get weaker, its possible to lengthen the life of the motor. Eventually, the capacitor will get too weak to start the motor and if the motor can't start, it can short out. Timely replacement of the capacitor is essential to Air Conditioning Maintenance.SAFETY TIPS FOR REPLACEMENTWhen replacing a capacitor always be sure to turn off the power to the air conditioning unit and place a screw driver between the terminals of the capacitor to release any stored charge. MaxRun Capacitors are designed to be the correct fit, but it's best to measure the height and width of the capacitor to double check that the replacement unit matches the original. We also recommend keeping a spare so you have one handy when it's needed. ## Features - THIS CAPACITOR is by 4.375" TALL by 2" WIDE - Measure Old Capacitor for Correct Fit - DESIGNED TO LAST 60,000 HOURS - Built to The Toughest Standards - EIA-456-A and IEC 60252 - DUAL CAPACITOR will run both a COMPRESSOR and FAN and WORKS WITH 370 or 440 VOLTS - ENGINEERED FOR SAFETY - 10,000 AFC Anti-Explosion Pressure Switch and No PBA's Used In This Product - EASY REPLACEMENT! Turn off the Power, Mark the Wires, Move the Wires to new Capacitor, Replace Capacitor and turn on Power. ## Product Details - **Capacitance:** 40 Microfarad - **Brand:** MaxRun Capacitors - **Material:** Metal - **Shape:** Cylindrical - **Operating Voltage:** 440 Volts ## Images ![MAXRUN 40+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor for AC Air Conditioner Condenser - 40/5 uf MFD 440V Straight Cool or Heat Pump - Will Run AC Motor and Fan - 1 Year Warranty - Image 1](https://m.media-amazon.com/images/I/71IbkY6vCfL.jpg) ![MAXRUN 40+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor for AC Air Conditioner Condenser - 40/5 uf MFD 440V Straight Cool or Heat Pump - Will Run AC Motor and Fan - 1 Year Warranty - Image 2](https://m.media-amazon.com/images/I/71Vhw7S8DYL.jpg) ![MAXRUN 40+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor for AC Air Conditioner Condenser - 40/5 uf MFD 440V Straight Cool or Heat Pump - Will Run AC Motor and Fan - 1 Year Warranty - Image 3](https://m.media-amazon.com/images/I/81Ed1GxzmnL.jpg) ![MAXRUN 40+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor for AC Air Conditioner Condenser - 40/5 uf MFD 440V Straight Cool or Heat Pump - Will Run AC Motor and Fan - 1 Year Warranty - Image 4](https://m.media-amazon.com/images/I/81G3pTHD8hL.jpg) ![MAXRUN 40+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor for AC Air Conditioner Condenser - 40/5 uf MFD 440V Straight Cool or Heat Pump - Will Run AC Motor and Fan - 1 Year Warranty - Image 5](https://m.media-amazon.com/images/I/91YZb0WeWeL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Replaced Higher Priced One For this Brand *by A***T on April 20, 2022* These Capacitor for AC central systems do not last so long. I've been replacing when they need too be. You'll know when you need to replace them. I trying out this brand I had heard about it, plus the specs matched up to what was in there. I had HD = heavy duty but those only lasted almost 5 years under yearly usage. My Ex her brother was AC tech but he never came here to install this they live 6 round trip. Not that hard to discharge the capacitor first with a large flat head screw driver. Make sure you take a picture of how the wires of the defective capacitor was. Match Fan C M/H for me there are 3 wires and you don't want them touching each other or touching metal.I want to see how long this last I need to keep one as spare. This and the inside handler 1/2 hp fan EMC..If you keep your coils outside clean helps keep everything running at peak and cold.Longevity This one I don't know year 2022 this was installed lets see how long it last.Update! March 2nd 2023No issues but I getting another one for the this price is a steal yet I think it was $9.99 last month. I repair my own central AC just cleaned on the air handler condenser coil with dog brush start from the top go downward. Sprayed vinegar mix with dawn generic one and water spray inside and out wait . Use the hose I got off Amazon has well. Had to repair that too. Cleaned out the evaporator line as well and the main unit outside condenser coil too. Once all this was done the air came in cooler ran less than before. Made my own connector to the dry vac intake outtake nozzle. That line needs to be clear every 6 months. Max Run worth the money. You know when it goes bad when the there is a loud db skrill.. I keep the house at 79F with digital LUX.Listen I think you should get you get the Max Run.. ### ⭐⭐⭐⭐⭐ Solid Choice *by T***I on December 26, 2024* This MAXRUN capacitor is a solid choice for replacing the dual run capacitor in my AC unit. It's the right size (40/5 MFD) and voltage (440V) and seems well-made. Installation was straightforward, and my AC has been running smoothly since. The one-year warranty provides some peace of mind. Overall, I'm happy with this purchase. ### ⭐⭐⭐⭐⭐ Verify the size before ordering, easy install, works great. *by T***R on February 25, 2022* This is an easy install, just disconnect power, wait a bit (to let it discharge) open a cover plate, use a screwdriver or something to short the terminals and verify no retained charge, and replace the wires on the same terminals with the new one as they were on with the old one. Each terminal has a different number of stabs (2,3, or 4), so easy to keep straight.Typically you will need a replacement run / start capacitor if your compressor FAN will not start. You can hear it humming, but not moving. Using a screwdriver to push start the blades will often get it working, and at that point you can be fairly confident the start portion of the capacitor is bad.My experience is that the start portion always fails first, not guaranteed but seems to be pretty common. It is very hard to test a capacitor properly without a special tool, so I have replaced this before on a "just in case" basis. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/51561238-maxrun-40-5-mfd-uf-370-or-440-volt-vac](https://www.desertcart.co.uk/products/51561238-maxrun-40-5-mfd-uf-370-or-440-volt-vac) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-04*