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40+5 MFD x 440 VAC Round Dual Run Capacitor

40+5 MFD x 440 VAC Round Dual Run Capacitor

Best price now

$15.10at PlumbersStock.comChecked 11 h ago

34% under what the other stores charge

Compared across 8 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $15.10 at PlumbersStock.com (checked Nov 13, 2026).
  • Checked at 8 stores.

Our take on the 40+5 MFD x 440 VAC Round Dual Run Capacitor

The Lennox 89M77 is a round dual run capacitor rated 40/5 MFD at 440 VAC. One section runs the compressor, the smaller one the condenser fan motor, so a single part replaces two separate capacitors in many residential condensing units. It is a service part: it suits HVAC technicians and handy homeowners replacing a failed capacitor on a compatible system. Against generic dual-run capacitors it offers the same electrical specs, so the choice comes down to physical fit and terminal layout rather than performance.

Best forHVAC technicians stocking a common dual-run valueHomeowners replacing a failed compressor/fan capacitorOlder residential condensing units that use a round 40/5 canAnyone matching an existing 440 VAC dual-run part
Pros
  • Covers compressor and fan motor in one part
  • 440 VAC rating suits most residential systems
  • Round case fits standard capacitor straps and brackets
  • Common 40/5 MFD split makes it easy to source
  • Dual-run design simplifies replacement versus two singles
Cons
  • No tolerance or life rating stated, so quality is hard to judge against spec-brand rivals
  • Must match the original microfarad values and case size exactly
  • Capacitors degrade with heat and age, so it is a wear item, not an upgrade
  • Wrong wiring during install can damage the compressor

40+5 MFD x 440 VAC Round Dual Run Capacitor prices at every store

  • PlumbersStock.comNew

    In stock

    $15.10+ $4.99 shippingChecked 11 h ago
    Visit PlumbersStock.com
  • SupplyHouse.comNew

    In stock

    $25.76+ $6.95 shippingChecked 11 h ago
    Visit SupplyHouse.com
  • WebstaurantStore.comNew

    In stock

    $15.70+ $27.40 shippingChecked 11 h ago
    Visit WebstaurantStore.com
  • Midwest Appliance PartsNew

    Availability unknown

    $20.37Checked 11 h ago
    Visit Midwest Appliance Parts
  • Jackson Systems & SupplyNew

    Availability unknown

    $22.14Checked 11 h ago
    Visit Jackson Systems & Supply
  • LONG PartsProsNew

    Availability unknown

    $23.02Checked 11 h ago
    Visit LONG PartsPros
  • ArborNew

    Availability unknown

    $26.80Checked 11 h ago
    Visit Arbor
  • Blackhawk SupplyNew

    Availability unknown

    $33.03Checked 11 h ago
    Visit Blackhawk Supply

Also available at

  • AmazonCheck price at Amazon
  • eBayCheck price at eBay
  • The Home DepotCheck price at The Home Depot
  • Parts TownCheck price at Parts Town
  • Parts Town MexicoCheck price at Parts Town Mexico
  • PlumbingSupplyandMore.comCheck price at PlumbingSupplyandMore.com
  • Schedule73PartsCheck price at Schedule73Parts
  • Surplus CityCheck price at Surplus City

Store links may earn us a commission.

40+5 MFD x 440 VAC Round Dual Run Capacitor price history

Lowest price we've seen: $11.64 on Nov 13 at Schedule73Parts. Tracked across 15 stores since Nov 13.

About the 40+5 MFD x 440 VAC Round Dual Run Capacitor

This is a round dual run capacitor rated 40/5 MFD at 440 VAC. It is the Lennox 89M77 and is used in HVAC systems.

The dual-run design supports both the fan motor and the compressor in a single unit.

Type
Round dual run capacitor
Capacitance
40/5 MFD
Voltage
440 VAC
Brand
Lennox
Part number
89M77
Application
HVAC systems, fan motor and compressor

Questions and answers

What does 40/5 MFD mean?
It is two capacitors in one case: a 40 microfarad section for the compressor and a 5 microfarad section for the fan motor. Both share the same 440 VAC rating.
Can I replace a 35/5 or 45/5 with this?
Only if the system calls for 40/5. Match the microfarad values on the old capacitor's label; going up or down changes motor performance and can shorten its life.
Does the voltage rating have to match exactly?
A 440 VAC rating can replace a 370 VAC part in most cases, since it is the minimum rating that matters. Never fit a lower-rated capacitor than the original.
How do I know it will fit?
Compare the case diameter and height with the old capacitor and check that the terminal layout matches. Round dual-run capacitors come in a few body sizes.
Is this a DIY job?
It can be, but the capacitor holds a charge and the compressor circuit is live. Shut off power at the disconnect, discharge the old capacitor, and note the wiring before removing it.
Where is the 40+5 MFD x 440 VAC Round Dual Run Capacitor cheapest?
At PlumbersStock.com, for $15.10, 34% under what the other stores charge, as of our latest check.
Where can I buy the 40+5 MFD x 440 VAC Round Dual Run Capacitor?
16 stores we checked sell it, including PlumbersStock.com, WebstaurantStore.com, Midwest Appliance Parts, Jackson Systems & Supply, LONG PartsPros.

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Stores we've priced the 40+5 MFD x 440 VAC Round Dual Run Capacitor at

  • Arbor deals and prices
  • The Home Depot deals and prices

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