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MARS
MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor

MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor

5(1 rating)

Best price now

$15.90at AmazonChecked 13 h ago

59% under what the other stores charge

Compared across 9 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

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Price facts

  • Lowest price today: $15.90 at Amazon (checked Nov 13, 2026).
  • Checked at 9 stores.

Our take on the MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor

The MARS USA2235 AmRad is a round dual run capacitor rated 40/5 MFD at 370/440 V, the common replacement for the start/run capacitor on air conditioner compressors and condenser fan motors. It is made in the USA, filled with a thick dielectric fluid to shed heat, and uses all-brass terminals that resist rust. The dual rating lets one can serve both the compressor and the fan motor, so it replaces two separate capacitors and simplifies a service call. It suits HVAC technicians and confident DIYers doing a like-for-like swap; the main trade-off is that it is a single fixed rating, so you must match the original microfarad values and voltage before buying.

Best forHVAC technicians replacing a failed dual run capacitorHomeowners doing a like-for-like AC capacitor swapCompressor and condenser fan motor serviceHot-climate systems where capacitor heat is a concern
Pros
  • Dual 40/5 MFD rating covers compressor and fan motor in one part
  • 370/440 V rating works on both common residential voltage systems
  • Made in the USA
  • Thick dielectric fluid fill helps reduce internal heat
  • All-brass terminals resist rust
  • UL/CSA recognized and OEM approved
Cons
  • Single fixed rating, so it only fits systems calling for 40/5 MFD
  • Round can requires the original mounting strap or bracket to line up
  • No discharge resistor built in, so you must discharge it before touching terminals
  • Must match voltage and capacitance exactly or the motor can be damaged

MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor prices at every store

  • HVAC & Tools DirectNew

    In stock

    $31.18+ $5.00 shippingChecked 13 h ago
    Visit HVAC & Tools Direct
  • eBayNew

    In stockSold by a.p.toolsandsupplies

    $39.00Free shippingChecked 13 h ago
    Visit eBay
  • HD SupplyNew

    In stock

    $38.99+ $10.00 shippingChecked 13 h ago
    Visit HD Supply
  • AmazonNew

    Availability unknown

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

    $15.90Checked 13 h ago
    Visit Amazon
  • Celebration Hardware CompanyNew

    Availability unknown

    $37.99Checked 13 h ago
    Visit Celebration Hardware Company
  • WalmartNew

    Availability unknownSold by WIDESTEP

    $50.49Checked 13 h ago
    Visit Walmart
  • DK HardwareNew

    Availability unknown

    $52.92Checked 13 h ago
    Visit DK Hardware
  • Radwell.comNew

    Availability unknown

    $59.00Checked 13 h ago
    Visit Radwell.com
  • Zoro.comNew

    Availability unknown

    $70.79Checked 13 h ago
    Visit Zoro.com

Store links may earn us a commission.

MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor price history

Lowest price we've seen: $15.90 on Nov 13 at Amazon. Tracked across 9 stores since Nov 13.

What reviewers say

Owners and technicians who use AmRad capacitors describe them as solid, long-lasting replacements that hold up in hot weather better than generic imports. Complaints are mostly about fit and the need to match the exact rating rather than the part's reliability.

What people mention
  • DurabilityPraisedOwners say it lasts multiple seasons in hot climates where cheaper capacitors fail.
  • Build qualityPraisedBrass terminals and the fluid fill are cited as signs of better construction than imports.
  • FitMixedThe round can does not always match the original mounting, so some installs need a new strap.
  • Rating matchCriticisedBuyers warn that ordering the wrong microfarad or voltage rating is easy and can damage the motor.

About the MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor

This is a round dual run capacitor for motors, rated 40/5 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 rust-free brass. The capacitor is UL/CSA Recognized.

Model
MARS USA2235 (AmRad)
Capacitance
40/5 MFD
Voltage
370/440 V
Type
Round dual run capacitor
Terminals
Rust-free brass
Fill
Thick dielectric fluid
Dimensions
2.165 in W x 4.18 in H
Certification
UL/CSA Recognized, OEM approved
Origin
Made in the USA

Questions and answers

What does 40/5 MFD mean?
It is a dual capacitor: 40 microfarads for the compressor (HERM) and 5 microfarads for the fan motor (FAN), sharing one common terminal.
Will this replace my old capacitor?
Only if your old one is also 40/5 MFD and rated 370 or 440 V. Read the label on the old can and match both numbers exactly.
Does the voltage rating matter?
Yes. The 370/440 V rating covers both common residential systems, but never substitute a lower voltage rating than the original.
Do I need to discharge it before removing it?
Yes. Capacitors store a charge; shut off power at the disconnect and discharge the terminals with an insulated resistor before touching them.
Is it made in the USA?
Yes, MARS lists the AmRad line as made in the USA, with UL/CSA recognition and OEM approval.
Where is the MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor cheapest?
At Amazon, for $15.90, 59% under what the other stores charge, as of our latest check.
What do buyers say about the MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor?
Rated 5 out of 5 from 1 ratings.
Where can I buy the MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor?
9 stores we checked sell it, including Amazon, HVAC & Tools Direct, Celebration Hardware Company, HD Supply, eBay.

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Stores we've priced the MARS USA2235 AmRad 40/5 MFD 370/440V Round Motor Dual Run Capacitor at

  • HD Supply deals and prices
  • Walmart deals and prices
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