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MARS
MARS 14172 45/10 MFD Round Run Capacitor 440/370V

MARS 14172 45/10 MFD Round Run Capacitor 440/370V

Best price now

$30.50at Voomi SupplyChecked Nov 13

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Last seen at $30.50 at Voomi Supply on Nov 13.
  • Checked at 2 stores.

Our take on the MARS 14172 45/10 MFD Round Run Capacitor 440/370V

The MARS 14172 is a dual round run capacitor rated 45+10 µF at 440/370V, built for HVAC compressor and fan motor circuits. It uses a non-PCB dielectric with a physical interrupter for safety and carries CSA approval and UL recognition. The aluminum case and dual capacitance let one part replace the separate compressor and fan capacitors in many condenser units, which saves wiring and space compared with two single capacitors. It suits technicians and homeowners doing a like-for-like replacement; the five-year limited warranty is longer than the one-year coverage typical of many import capacitors.

Best forHVAC technicians replacing a dual run capacitorHomeowners matching an existing 45+10 µF partCondenser units needing 440/370V ratingLike-for-like compressor and fan motor repairs
Pros
  • Dual 45+10 µF capacitance replaces two single capacitors
  • 440/370V rating covers both common system voltages
  • Non-PCB construction with a physical interrupter
  • CSA approved and UL recognized
  • Five-year limited warranty
  • Aluminum round case fits standard capacitor clamps
Cons
  • Operating range stated as -40 to 70°F, narrow for cold-climate service
  • Three-blade terminal layout requires matching the original wiring
  • No discharge resistor mentioned
  • Must match capacitance and voltage exactly to avoid motor damage

MARS 14172 45/10 MFD Round Run Capacitor 440/370V prices at every store

  • Voomi SupplyNew

    In stockReturn policy

    $30.50Checked Nov 13
    Visit Voomi Supply
  • AmazonNew

    Availability unknown

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

    $39.92Free shippingChecked Nov 13
    Visit Amazon

Store links may earn us a commission.

MARS 14172 45/10 MFD Round Run Capacitor 440/370V price history

Lowest price we've seen: $39.92 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.

About the MARS 14172 45/10 MFD Round Run Capacitor 440/370V

The MARS 14172 is a dual round run capacitor rated 45 and 10 microfarads at 440 and 370 volts. It is used in HVAC systems for motor run applications.

It is a non-PCB capacitor with a physical interrupter for safety. It is CSA approved and UL recognized. The capacitor is designed for general replacement and meets performance standards set by top motor and compressor manufacturers.

Brand
MARS
MPN
14172
Capacitance
45+10 MFD
Voltage rating
440V, 370V
Shape
Round
Case material
Aluminum
Terminals
3 terminals (4, 3, and 2 blades)
Operating temperature
-40 to 70 degrees F
Safety
Non-PCB, physical interrupter
Certifications
CSA approved, UL recognized
Warranty
Five-year limited

Questions and answers

What does 45+10 µF mean on this capacitor?
It is a dual capacitor: one section is 45 µF for the compressor and the other is 10 µF for the fan motor. Both share one case and one common terminal.
Can I use it to replace a 45/5 µF capacitor?
Only if the fan section truly needs 10 µF. The compressor section must match at 45 µF, and the fan section should match the motor's rating; substituting a different value can overheat or stall the fan motor.
Does the 440/370V rating matter?
It is the maximum voltage the capacitor is rated for. A 440V rating covers 370V systems, so it works in either, but never install one rated below your system's voltage.
How do I wire the three terminals?
The terminals are typically labeled for compressor (HERM), fan (FAN) and common (C). Match the original capacitor's labeling and disconnect power before swapping.
Is this capacitor safe around older refrigerants?
It is non-PCB, so it avoids the hazardous dielectric found in legacy capacitors. It still holds a charge after power-off, so discharge it before handling.
What is covered by the warranty?
MARS offers a five-year limited warranty. Keep the receipt and confirm the part number, since coverage terms are set by the manufacturer.
Where is the MARS 14172 45/10 MFD Round Run Capacitor 440/370V cheapest?
At Voomi Supply, for $30.50, as of our latest check.
Where can I buy the MARS 14172 45/10 MFD Round Run Capacitor 440/370V?
2 stores we checked sell it, including Voomi Supply, Amazon.

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