124-149 uF MFD 165 VAC Round Start Capacitor - Fits AC Motor Run, Fan Start, Heat Pump
BlueStars 124-149 uF 165 VAC round start capacitor with terminal connectors.
BlueStars 124-149 uF 165 VAC round start capacitor with 3.18-inch height and 1.8-inch diameter dimensions.
Specification chart for 124-149 uF 165 VAC round start capacitor with technical details and product image.
BlueStars 124-149 uF 165 VAC 2-pin round motor start capacitor with label details.
Infographic showing 124-149 uF 165 VAC round start capacitor features, including metalized film and phenolic resin casing.
Infographic showing 124-149 uF 165 VAC round start capacitor specifications and selection guide.
Close-up of 124-149 uF 165 VAC round start capacitor being installed in an AC motor.
124-149 uF 165 VAC round start capacitor for AC motors and pumps shown with cutaway motor diagram.
Infographic showing wide application of 124-149 uF 165 VAC start capacitor for motors, pumps, and heat pump equipment.
Four-step installation guide for 124-149 uF 165 VAC round start capacitor on an AC motor.
BlueStars 124-149 uF 165 VAC round start capacitor with terminal connectors.
BlueStars 124-149 uF 165 VAC round start capacitor with 3.18-inch height and 1.8-inch diameter dimensions.
Specification chart for 124-149 uF 165 VAC round start capacitor with technical details and product image.
BlueStars 124-149 uF 165 VAC 2-pin round motor start capacitor with label details.
Infographic showing 124-149 uF 165 VAC round start capacitor features, including metalized film and phenolic resin casing.
Infographic showing 124-149 uF 165 VAC round start capacitor specifications and selection guide.
Close-up of 124-149 uF 165 VAC round start capacitor being installed in an AC motor.
124-149 uF 165 VAC round start capacitor for AC motors and pumps shown with cutaway motor diagram.
Infographic showing wide application of 124-149 uF 165 VAC start capacitor for motors, pumps, and heat pump equipment.
Four-step installation guide for 124-149 uF 165 VAC round start capacitor on an AC motor.

124-149 uF MFD 165 VAC Round Start Capacitor - Fits AC Motor Run, Fan Start, Heat Pump

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124-149 uf/MFD 165VAC Round Run Start Capacitor

Key Features

  • Capacitance: 124-149 µF (MFD)
  • Rated Voltage: 165VAC
  • Frequency: 50/60 Hz
  • Tolerance: -0% / +20%
  • Terminals: 1/4 inch quick-disconnect
  • Operating Temperature Range: -40°C to +65°C
  • Construction: Oil-filled, moisture-resistant plastic case
  • Certifications: UL 810 Recognized
  • Contains no Polychlorinated Biphenyls (PCBs)

Replaces / Cross-Reference Part Numbers

This is a universal replacement for any round motor start capacitor with matching capacitance and voltage specifications. It is a common replacement for capacitors identified as CD60 with these ratings.

Compatibility & Fitment

Designed for use in single-phase and three-phase AC electric motors. Common applications include:

  • Air conditioners
  • Heat pumps
  • Compressors
  • Refrigeration units
  • Furnace fans
  • Other motor-driven equipment

When to Replace

A failing or failed capacitor can cause several symptoms:

  • The motor hums but fails to start or turn.
  • The motor starts slowly or requires manual assistance.
  • The circuit breaker trips when the motor attempts to start.
  • The capacitor case is visibly bulged, cracked, or leaking fluid.

Installation Tips

  • Disconnect all electrical power from the equipment before beginning work.
  • Safely discharge the existing capacitor by shorting its terminals with an insulated tool, such as a screwdriver with a plastic handle.
  • Confirm the new capacitor's specifications match the original. The capacitance (µF/MFD) should be the same. The voltage (VAC) rating must be equal to or higher than the original part.
  • Connect wires to the new capacitor terminals securely. Polarity is not a concern for AC start capacitors.

Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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FAQs

This capacitor is used in some AC motor start, fan start, and heat pump applications, but compatibility depends on the exact electrical rating and the equipment's original part specification. Match the capacitance range (124-149 uF MFD), voltage rating (165 VAC), shape/style (round), and terminal configuration to your original capacitor before ordering. Always verify against the unit model number and the data printed on the old capacitor.
For capacitance, you should match the specified range exactly: 124-149 uF. A start capacitor that is significantly above or below the required MFD range can cause hard starting, overheating, or motor damage. The voltage rating should match the original rating or be higher if the application allows it, but never lower. If your old capacitor has a different MFD range, this is not the correct substitute.
Typical symptoms include a motor that hums but will not start, a fan or compressor that struggles to begin turning, intermittent startup, tripped breakers, or a system that needs a manual push to get moving. In some cases, the capacitor may show physical signs such as bulging, leaking oil, or a burnt smell, but many bad capacitors fail without obvious external damage.
First disconnect power completely. After safely discharging the capacitor, inspect it for swelling, leaks, or damaged terminals. Then test it with a multimeter that has a capacitance function and compare the reading to the labeled 124-149 uF range. If the reading is well outside that range, or the capacitor is open or shorted, it should be replaced. If the capacitor tests good, the problem may be elsewhere, such as a contactor, relay, motor winding, or power supply issue.
Installation is usually straightforward for an experienced DIYer or technician, but capacitors can hold a dangerous electrical charge even after power is turned off. Typical tools include a screwdriver or nut driver, needle-nose pliers, a camera or phone to document wire positions, and a multimeter. The job often takes about 15 to 30 minutes once the correct replacement has been confirmed. If you are not comfortable working around high-voltage HVAC components, professional installation is recommended.
Before installation, turn off power at the disconnect and breaker, verify the capacitor has been discharged, and label or photograph all wire connections. Compare the old and new capacitor for MFD rating, VAC rating, terminal style, and mounting fit. It is also wise to inspect related components such as the contactor, start relay if used, wiring ends, and the motor or compressor for overheating or seized bearings, since a failed capacitor is sometimes a symptom rather than the only problem.
Common causes include age, repeated high-heat operation, voltage stress, frequent short cycling, dirty condenser coils causing heavy motor load, weak relays, and general wear in the motor or compressor. In outdoor HVAC equipment, heat and vibration are especially hard on capacitors. If a replacement capacitor fails again quickly, the underlying motor load or control issue should be diagnosed.