270-324 uF MFD 330 VAC Round Start Capacitor 50/60 Hz - Fits Air Conditioner, Heat Pump Condenser - 2 Pack
Two 270-324 uF 330 VAC round start capacitors for air conditioner and heat pump condensers.
Single 270-324 uF 330 VAC round motor start capacitor with technical specifications infographic.
Infographic showing dimensions of 270-324 uF 330 VAC round start capacitor for AC and heat pump motors.
Air conditioner and heat pump condenser units showing symptoms for start capacitor replacement.
Close-up of a 270-324 uF 330 VAC round start capacitor for air conditioner and heat pump condensers.
Infographic showing 270-324 uF 330 VAC round start capacitor features and terminal close-up.
Woman relaxing on a couch under an air conditioner with BlueStars Economical DIY Repair text overlay.
Two 270-324 uF 330 VAC round start capacitors for air conditioner and heat pump condensers.
Single 270-324 uF 330 VAC round motor start capacitor with technical specifications infographic.
Infographic showing dimensions of 270-324 uF 330 VAC round start capacitor for AC and heat pump motors.
Air conditioner and heat pump condenser units showing symptoms for start capacitor replacement.
Close-up of a 270-324 uF 330 VAC round start capacitor for air conditioner and heat pump condensers.
Infographic showing 270-324 uF 330 VAC round start capacitor features and terminal close-up.
Woman relaxing on a couch under an air conditioner with BlueStars Economical DIY Repair text overlay.
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270-324 uF MFD 330 VAC Round Start Capacitor 50/60 Hz - Fits Air Conditioner, Heat Pump Condenser - 2 Pack

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270-324 uF/MFD 330 VAC Volts

Key Features

  • Type: Motor Start Capacitor
  • Capacitance: 270-324 Microfarad (uF/MFD)
  • Voltage Rating: 330 VAC
  • Frequency: 50/60 Hz
  • Shape: Round
  • Case Material: Bakelite
  • Terminals: 1/4 inch Male Terminals
  • Dimensions: 2 9/16 in. Diameter x 4 3/8 in. Height

Replaces / Cross-Reference Part Numbers

  • MARS2 11970
  • Titan Pro TRMJ270
  • Replaces any start capacitor with matching capacitance (270-324 MFD) and voltage (330 VAC or higher) specifications.

Compatibility & Fitment

  • Designed for intermittent duty cycles in single-phase AC motor starting circuits.
  • Commonly used in HVAC units, pool pumps, well pumps, and other electric motor applications.
  • This is a start capacitor and cannot be used as a replacement for a run capacitor.

When to Replace

  • Motor hums but does not start or struggles to start.
  • Circuit breaker trips at motor startup.
  • Visible signs of damage to the old capacitor, such as bulging, cracking, or leaking fluid.
  • The motor starts slowly or requires manual assistance to get started.

Installation Tips

  • Disconnect all electrical power to the unit before servicing.
  • Safely discharge the old capacitor by shorting the terminals with an insulated screwdriver.
  • Ensure the replacement capacitor's microfarad (uf/MFD) rating is within 10% of the original part.
  • The voltage rating of the replacement capacitor must be equal to or greater than the original.
  • Professional installation is recommended.
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  • Perfect fit

    Perfect fit

    Universal fit with any brands with the same ratings
  • Premium quality

    Premium quality

    This product adopts a high-quality metalized polypropylene film that provides stable and durable performance
  • Saving solution

    Saving solution

    Enjoy the great feeling when your engine is repaired and works properly like before - BlueStars brings DIY solutions to help you deal with any trouble
  • Simple installation

    Simple installation

    Because the capacitor is a relatively simple part, the installation just takes a few minutes and will save you at least a hundred bucks in labor

FAQ

Common symptoms of a failing start capacitor include the air conditioner or heat pump compressor struggling to start, a humming sound coming from the unit without the motor engaging, or the unit repeatedly tripping the circuit breaker. If the capacitor casing appears swollen, bulging, or shows signs of leaking fluid, it must be replaced immediately.
This capacitor is a direct replacement for the Mars/BMI part number 092A270B330CE7A. It is compatible with any application requiring a 270-324 uF rating at 330 VAC.
Replacing a capacitor is a routine maintenance task, but it involves high-voltage components. Always turn off the power to the HVAC unit at the disconnect box or circuit breaker before beginning. Use an insulated screwdriver to discharge the old capacitor by touching the terminals before handling it. If you are not comfortable working with electrical components, consult a professional technician.
You will typically need a screwdriver to remove the access panel, a pair of needle-nose pliers to disconnect the wire terminals, and an insulated screwdriver for discharging the capacitor. The entire process generally takes 15 to 30 minutes.
Start capacitors are designed to provide a high-torque boost to get the motor spinning. Over time, they degrade due to heat exposure, frequent cycling, and internal chemical breakdown. Because they are only engaged for a fraction of a second during startup, they are prone to wear if the motor encounters resistance or if the ambient temperature in the condenser housing remains consistently high.