35 uF MFD ±5% 370/440 VAC Multi-Purpose Motor Run Round Capacitor - Fits AC Motor Run, Fan Start, Condenser
35 uF 370/440 VAC round motor run capacitor with BlueStars label and dual terminal connectors.
Step-by-step installation guide for 35 uF motor run capacitor showing AC unit wiring and replacement process.
Infographic showing two 35 uF 370/440 VAC round motor run capacitors and signs indicating when to replace an AC unit.
BlueStars 35 uF 370/440 VAC round motor run capacitor for AC and fan systems.
BlueStars 35 uF 370/440 VAC round motor run capacitor with dimensions and certification labels.
Specification chart for 35 uF 370/440 VAC round motor run capacitor with technical details.
Top view of 35 uF 370/440 VAC motor run capacitor showing 2-terminal layout with Common, Fan, and Herm labels.
Infographic showing 35 uF 370/440 VAC round motor run capacitor with aluminum case and metalized polypropylene film details.
Educational infographic showing how to choose a 35 uF 370/440 VAC round motor run capacitor.
35 uF 370/440 VAC round motor run capacitor for AC condenser and fan units.
Technician installing a 35 uF 370/440 VAC round motor run capacitor into an AC condenser unit.
Infographic showing 35 uF motor run capacitor applications for AC, refrigerator, heat pump, and compressor units.
35 uF 370/440 VAC round motor run capacitor with BlueStars label and dual terminal connectors.
Step-by-step installation guide for 35 uF motor run capacitor showing AC unit wiring and replacement process.
Infographic showing two 35 uF 370/440 VAC round motor run capacitors and signs indicating when to replace an AC unit.
BlueStars 35 uF 370/440 VAC round motor run capacitor for AC and fan systems.
BlueStars 35 uF 370/440 VAC round motor run capacitor with dimensions and certification labels.
Specification chart for 35 uF 370/440 VAC round motor run capacitor with technical details.
Top view of 35 uF 370/440 VAC motor run capacitor showing 2-terminal layout with Common, Fan, and Herm labels.
Infographic showing 35 uF 370/440 VAC round motor run capacitor with aluminum case and metalized polypropylene film details.
Educational infographic showing how to choose a 35 uF 370/440 VAC round motor run capacitor.
35 uF 370/440 VAC round motor run capacitor for AC condenser and fan units.
Technician installing a 35 uF 370/440 VAC round motor run capacitor into an AC condenser unit.
Infographic showing 35 uF motor run capacitor applications for AC, refrigerator, heat pump, and compressor units.
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35 uF MFD ±5% 370/440 VAC Multi-Purpose Motor Run Round Capacitor - Fits AC Motor Run, Fan Start, Condenser

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35 uF MFD ± 5% 370-440 VAC Volt Multi-Purpose Motor Run Round Capacitor

Key Features

  • Capacitance Rating: 35 Microfarad (uF/MFD)
  • Voltage Compatibility: 370V or 440V AC
  • Capacitance Tolerance: ±5%
  • Operating Frequency: 50/60 Hz
  • Case Shape: Round
  • Operating Temperature: -40°C to +70°C (-40°F to +158°F)
  • Construction: Oil-filled aluminum can for heat dissipation and longevity
  • Safety: Integrated pressure-sensitive interrupter

Replaces / Cross-Reference Part Numbers

This capacitor is a universal replacement for any brand's single-value round capacitor with the same 35 MFD capacitance and 370V or 440V rating. Verify physical dimensions for a proper fit.

  • Replaces capacitors with markings such as CBB65.
  • Direct substitute for parts from brands including Genteq, Packard, Titan, and Mars with matching specifications.

Compatibility & Fitment

  • Designed for continuous use in single-phase motor applications.
  • Commonly used in HVAC systems, air conditioners, heat pumps, condenser units, compressors, and other electric motors.
  • A 440V capacitor can safely replace a 370V unit with the same MFD rating.
  • Ensure the physical dimensions (diameter and height) match the available space in your equipment.

When to Replace

  • The motor hums but does not start or requires a manual push to start.
  • Visible damage to the old capacitor, such as a bulging or swollen case, or fluid leakage.
  • The fan or compressor in an HVAC unit fails to turn on.
  • Capacitance reading on the existing capacitor is outside its rated tolerance (e.g., below 33.25 MFD or above 36.75 MFD for a ±5% unit).

Installation Tips

  • Warning: Capacitors can store a dangerous electrical charge. Disconnect all power to the unit before servicing.
  • Safely discharge the existing capacitor by shorting the terminals with an insulated-handle screwdriver.
  • Note or photograph the wire connections before removing the old capacitor to ensure correct installation.
  • Connect the wires to the corresponding terminals on the new capacitor. Polarity is not a concern for AC motor run capacitors.
  • Secure the new capacitor with the original mounting bracket.
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  • Step 1

    Step 1

    Turn off the power and locate the capacitor
  • Step 2

    Step 2

    Discharge any stored electricity by shorting the terminals
  • Step 3

    Step 3

    Take a photo or note how the wires connect. Disconnect wires & install the new capacitor.
  • Step 4

    Step 4

    Reassemble and test

FAQ

A failing capacitor often shows physical signs such as a bulging or domed top, leaking oil, or a burnt smell. Functionally, you may notice your motor struggling to start, humming without spinning, or the equipment running at a slower-than-normal speed. If you have a multimeter with a capacitance setting, you can test the terminals; if the reading is significantly outside the 35 µF ±5% range, the capacitor should be replaced.
Yes, this capacitor is rated for both 370 VAC and 440 VAC. It is designed to handle the higher voltage rating, making it a suitable replacement for equipment originally equipped with either voltage specification.
The 35 µF (microfarad) rating is the electrical storage capacity required by your motor to maintain torque and speed. It is critical to match this number exactly. The ±5% tolerance indicates the allowable variance from that 35 µF rating; this capacitor is manufactured to stay within that precise range for optimal motor performance.
Installation typically requires a screwdriver to open the access panel, a pair of insulated needle-nose pliers to remove and attach the spade connectors, and a pair of insulated pliers or a screwdriver to safely discharge the old capacitor before handling. The process usually takes 15 to 30 minutes for those familiar with basic electrical safety.
Always disconnect the power supply to the unit before beginning any work. Capacitors store a significant electrical charge even after the power is turned off. Before touching the terminals, use an insulated-handle screwdriver to short across the terminals to safely discharge any remaining energy.
The most common cause of failure is heat exposure. Over time, the internal dielectric material degrades, leading to a loss of capacitance. Frequent power surges, high ambient temperatures in the condenser unit, and general wear and tear from years of operation will eventually cause the capacitor to lose its ability to effectively start or run the motor.