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MARS USA2236 AmRad 45/5 MFD 370/440V Round Motor Dual Run Capacitor

MARS USA2236 AmRad 45/5 MFD 370/440V Round Motor Dual Run Capacitor

5(1 rating)

Best price now

$31.98at Edmondson SupplyChecked 13 h ago

64% under what the other stores charge

Compared across 5 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $31.98 at Edmondson Supply (checked Nov 13, 2026).
  • Checked at 5 stores.

Our take on the MARS USA2236 AmRad 45/5 MFD 370/440V Round Motor Dual Run Capacitor

The MARS USA2236 AmRad is a round dual run capacitor rated 45/5 MFD at 370/440 V, used to start and run a compressor and a condenser fan motor in one part. It is filled with a thick dielectric fluid to shed heat, and its terminals are all brass so they resist rust. It suits HVAC techs and homeowners replacing a failed dual capacitor in a central air unit. Against generic imported capacitors, the US-made build and brass terminals are the selling points; owners of AmRad caps generally report long service, though the round case fits only the mounting brackets sized for it.

Best forAir conditioning compressor and fan motor repairHVAC technicians stocking a common dual ratingReplacing a failed round dual run capacitor
Pros
  • Dual 45/5 MFD section covers compressor and fan in one can
  • Rated 370/440 V for both residential and light commercial use
  • Thick dielectric fluid helps dissipate heat
  • All-brass terminals resist corrosion
  • Made in the USA and UL/CSA recognized
Cons
  • Round case needs a matching bracket; not a drop-in for oval mounts
  • No bleeder resistor, so it must be discharged before handling
  • Wrong MFD or voltage rating can damage the compressor motor
  • Only two sections; three-terminal jobs need a different part

MARS USA2236 AmRad 45/5 MFD 370/440V Round Motor Dual Run Capacitor prices at every store

  • Edmondson SupplyNew

    In stockReturn policy

    $31.98Checked 13 h ago
    Visit Edmondson Supply
  • The AC OutletNew

    In stock

    $89.53Free shippingChecked 13 h ago
    Visit The AC Outlet
  • SupplyHouse.comNew

    In stock

    $93.10+ $6.95 shippingChecked 13 h ago
    Visit SupplyHouse.com
  • HVACProSalesNew

    In stock

    $102.99Free shippingChecked 13 h ago
    Visit HVACProSales
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $34.75Checked 13 h ago
    Visit Amazon

Store links may earn us a commission.

MARS USA2236 AmRad 45/5 MFD 370/440V Round Motor Dual Run Capacitor price history

Lowest price we've seen: $34.75 on Nov 13 at Amazon. Tracked across 4 stores since Nov 13.

What reviewers say

Owners and techs who use AmRad capacitors report they hold up well in hot condenser cabinets, with brass terminals that stay clean. Complaints center on the round can not fitting oval brackets and on the need to match the rating exactly.

What people mention
  • BuildPraisedOwners say the US-made can and brass terminals hold up in hot outdoor cabinets.
  • HeatPraisedThe fluid fill is credited with keeping the capacitor cooler under load.
  • FitCriticisedThe round case does not drop into brackets made for oval capacitors.
  • RatingMixedBuyers note the 45/5 MFD 370/440 V rating must match the old part exactly.

About the MARS USA2236 AmRad 45/5 MFD 370/440V Round Motor Dual Run Capacitor

The MARS USA2236 AmRad is a round motor dual run capacitor rated 45/5 MFD at 370/440 V. It is made in the USA and is OEM approved.

The case is filled with a thick dielectric fluid to reduce heat. The terminals are all brass and rust free. The capacitor is UL/CSA Recognized.

Brand
MARS
Model
USA2236 AmRad
Capacitance
45/5 MFD
Voltage
370/440 V
Type
Round motor dual run capacitor
Case dimensions
2.165 in W x 4.18 in H
Terminals
Rust free, all brass
Filling
Thick dielectric fluid
Certifications
UL/CSA Recognized, OEM approved
Origin
Made in the USA

Questions and answers

What does 45/5 MFD mean?
It is a dual capacitor: 45 microfarads for the compressor (HERM) and 5 microfarads for the fan (FAN), sharing one common terminal.
Can it replace a 370 V capacitor?
Yes. The 370/440 V rating covers both, so it works in either application as long as the MFD values match.
Will it fit my unit?
Only if your bracket holds a round case about 2.165 in wide and 4.18 in tall. Oval mounts need a different capacitor.
Is it safe to install myself?
Capacitors store a charge. Power off the unit and discharge the terminals with an insulated resistor before touching them; if unsure, use a technician.
What is in the box?
The capacitor itself. Wiring is terminal-to-terminal per the unit's diagram; no resistor or bracket is included.
Where is the MARS USA2236 AmRad 45/5 MFD 370/440V Round Motor Dual Run Capacitor cheapest?
At Edmondson Supply, for $31.98, 64% under what the other stores charge, as of our latest check.
What do buyers say about the MARS USA2236 AmRad 45/5 MFD 370/440V Round Motor Dual Run Capacitor?
Rated 5 out of 5 from 1 ratings.
Where can I buy the MARS USA2236 AmRad 45/5 MFD 370/440V Round Motor Dual Run Capacitor?
5 stores we checked sell it, including Edmondson Supply, Amazon, The AC Outlet, SupplyHouse.com, HVACProSales.

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