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400-480 uF MFD 110-125 VAC Round Motor Start Capacitor 50/60 Hz AC Electric Replacement

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400-480 uf/MFD 110-125 VAC Round Motor Start

Key Features

  • Capacitance: 400-480 MFD/uf
  • Voltage Rating: 110-125 VAC
  • Frequency: 50/60 Hz
  • Operating Temperature: -40°C to +65°C (-40°F to +149°F)
  • Capacitance Tolerance: -0% / +20%
  • Terminals: Standard 1/4 inch quick connect
  • Housing: Moisture and oil-resistant plastic case
  • Safety Standard: UL 810 recognized component

Replaces / Cross-Reference Part Numbers

  • Packard PMJ400
  • TEMCo SC0032
  • Replaces any round CD60-type motor start capacitor with matching capacitance and voltage specifications. Always verify dimensions for proper fit.

Compatibility & Fitment

  • Designed for intermittent duty in single-phase AC motor starting circuits.
  • Common applications include HVAC units, air compressors, well pumps, pool pumps, and other electric motors requiring start assistance.
  • Compatible with systems operating at 110V, 115V, and 125V.

When to Replace

  • Motor hums but fails to start.
  • Motor starts slowly or requires manual help to spin.
  • Circuit breaker trips when the motor attempts to start.
  • Visible signs of damage such as bulging, cracking, or fluid leakage from the capacitor case.

Installation Tips

  • Disconnect all electrical power to the equipment before servicing.
  • Safely discharge the existing capacitor by shorting its terminals with an insulated-handle screwdriver.
  • Note the wire connections before removing the old capacitor.
  • Ensure the replacement capacitor's voltage rating is equal to or greater than the original.
  • The capacitance (MFD/uf) rating should be within the specified range of the original part.
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  • Benefits

    Benefits

    Start capacitors are needed at the beginning of each cycle and run capacitors are necessary for keeping HVAC running throughout the cycle. Replacing bad capacitors can help promote efficient operation and lengthen the life of your HVAC units
  • Energy Saving

    Energy Saving

    This capacitor will provide your electric motors with an outstanding electrical characteristic of high capacitance stability over time and temperature, and very low internal power loss.
  • Premium Quality

    Premium Quality

    The product is made of strong & durable materials that prevent cracking and failing during the installation and use process.
  • Safe To Install

    Safe To Install

    The capacitor is engineered for safety and ensure security when replacing
Shape
‎Round Motor Start
Capacitance tolerance
‎± 20%
Rated voltage
‎AC 110-125V
Temperature range
‎-40℃ to +65℃ / -40℉ to 149℉
Capacitor Dimensions
‎36mm x 70mm
Engineered For Safety
‎10000 AFC Anti Explosion Pressure Switch

FAQ

A failing start capacitor typically prevents the motor from reaching its operating speed. You may notice the motor humming or buzzing loudly without turning, or it may struggle to start and trip the circuit breaker. In some cases, the motor may only start if you manually spin the shaft, or it may fail to start entirely.
This capacitor is designed for motors requiring a 400-480 uF (MFD) rating at 110-125 VAC. It is commonly used in HVAC systems, air compressors, and water pumps. Always verify the specifications printed on your existing capacitor to ensure the capacitance (uF/MFD) and voltage (VAC) ratings match your motor's requirements.
The uF (microfarad) or MFD rating indicates the electrical storage capacity of the capacitor. A range of 400-480 uF means this unit is designed to provide the necessary torque to start motors within that specific capacitance requirement. It is a direct replacement for parts labeled with this specific range, such as the MARS 11924.
Safety is critical. Always disconnect the power supply to the equipment before beginning. Because capacitors store an electrical charge even when power is off, you must safely discharge the old capacitor by shorting the terminals with an insulated screwdriver before handling it. Check the wiring connections for any signs of corrosion or heat damage and clean them if necessary to ensure a solid connection.
Installation is generally straightforward and takes about 15 to 30 minutes. You will typically need a screwdriver to open the access panel, an insulated screwdriver to discharge the capacitor, and needle-nose pliers to remove and attach the wire terminals. Ensure the new capacitor is securely mounted in the same orientation as the original.