50+5 uF MFD 370/440 VAC Dual Run Start Round AC Capacitor - Fits Condenser, Heat Pump - Replaces 97F9850
BlueStars 50+5 uF 370/440 VAC dual run round AC capacitor for condenser and heat pump units.
Infographic showing four easy steps for installing a 50+5 uF dual run AC capacitor in a condenser unit.
Infographic showing two 50+5 uF 370/440 VAC dual run capacitors and signs indicating when to replace an AC capacitor.
50+5 uF dual run round AC capacitor for condenser and heat pump systems shown in a lifestyle marketing graphic.
BlueStars 50+5 uF 370/440 VAC dual run round AC capacitor with dimensions and certification labels.
Technical specification chart for 50+5 uF 370/440 VAC dual run round AC capacitor with product image.
Top view of 50+5 MFD dual run capacitor showing C, HERM, and FAN terminal labels for AC condenser and heat pump.
BlueStars 50+5 uF 370/440 VAC dual run round AC capacitor with aluminum case and metalized film construction details.
Educational infographic showing a 50+5 uF 370/440 VAC dual run capacitor with a guide on how to choose the right part.
BlueStars 50+5 uF 370/440 VAC dual run capacitor shown with a technician repairing an AC condenser unit.
Technician installing a 50+5 uF 370/440 VAC dual run capacitor into an AC condenser unit.
Infographic showing wide range applications for 50+5 uF dual run capacitor in AC, refrigerator, heat pump, and compressor.
BlueStars 50+5 uF 370/440 VAC dual run round AC capacitor for condenser and heat pump units.
Infographic showing four easy steps for installing a 50+5 uF dual run AC capacitor in a condenser unit.
Infographic showing two 50+5 uF 370/440 VAC dual run capacitors and signs indicating when to replace an AC capacitor.
50+5 uF dual run round AC capacitor for condenser and heat pump systems shown in a lifestyle marketing graphic.
BlueStars 50+5 uF 370/440 VAC dual run round AC capacitor with dimensions and certification labels.
Technical specification chart for 50+5 uF 370/440 VAC dual run round AC capacitor with product image.
Top view of 50+5 MFD dual run capacitor showing C, HERM, and FAN terminal labels for AC condenser and heat pump.
BlueStars 50+5 uF 370/440 VAC dual run round AC capacitor with aluminum case and metalized film construction details.
Educational infographic showing a 50+5 uF 370/440 VAC dual run capacitor with a guide on how to choose the right part.
BlueStars 50+5 uF 370/440 VAC dual run capacitor shown with a technician repairing an AC condenser unit.
Technician installing a 50+5 uF 370/440 VAC dual run capacitor into an AC condenser unit.
Infographic showing wide range applications for 50+5 uF dual run capacitor in AC, refrigerator, heat pump, and compressor.
Lifetime Warranty

50+5 uF MFD 370/440 VAC Dual Run Start Round AC Capacitor - Fits Condenser, Heat Pump - Replaces 97F9850

Save 13%
0.00
$25.12
$28.89
$25.12
In stock
Fast delivery

Secure and trusted checkout with

  • Visa
  • Mastercard
  • American Express
  • PayPal
  • Diners Club
  • Discover
Contact for wholesale
🛠️
CONFIRM THE FIT FOR YOUR MODEL
Enter your model number

97F9850 97F9970 50+5 uF/MFD 370 or 440 VAC Dual Run Circular Start Capacitor

Key Features

  • Capacitance Rating: 50 + 5 Microfarad (uF/MFD)
  • Voltage Rating: Dual rated for 370 VAC or 440 VAC applications
  • Capacitance Tolerance: ±6%
  • Shape: Round / Circular
  • Dimensions: 2.36 inch (60 mm) diameter
  • Terminals: Three terminals for Common, Compressor, and Fan Motor
  • Construction: Aluminum case, oil-filled design for heat dissipation
  • Safety: UL 810 listed; contains no PCBs

Replaces / Cross-Reference Part Numbers

  • 97F9850
  • 97F9970
  • Also replaces other brand capacitors with matching 50/5 MFD and 370V or 440V specifications.

Compatibility & Fitment

  • For use in a wide range of HVAC systems, central air conditioners, and heat pumps.
  • Functions as a direct replacement for units from various manufacturers requiring a 50/5 uF dual run capacitor.
  • Always verify the MFD and voltage ratings of your original capacitor before purchasing.

When to Replace

  • Compressor or fan motor hums but fails to start.
  • Component runs intermittently or not at all.
  • The capacitor case is visibly swollen, bulging, or leaking oil.
  • Capacitance tests outside the component's rated tolerance.

Installation Tips

  • Disconnect all electrical power to the HVAC unit before servicing.
  • Discharge the existing capacitor to avoid electrical shock.
  • Note the wire placement on the old capacitor's "C", "HERM", and "FAN" terminals before disconnecting.
  • A 440V rated capacitor can safely replace a 370V capacitor, but a 370V cannot replace a 440V.
  • Ensure the 50 MFD and 5 MFD ratings match the original part precisely.
Product image 1
Product image 2
Product image 3
Product image 4
  • 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

This capacitor is a direct replacement for OEM part numbers 97F9850 and 97F9970. It also cross-references with Z97F9850 and 27L569.
Common signs include your AC unit failing to start, a humming sound coming from the condenser unit, the fan motor struggling to spin or requiring a manual push to start, or the system blowing warm air. If the top of the capacitor appears domed or bulging, it has failed and must be replaced.
Yes. A 440V capacitor is interchangeable with a 370V capacitor of the same MFD rating. Using a higher voltage rating is safe and often provides better heat tolerance, though you must ensure the MFD (microfarad) rating matches your original part exactly.
Replacing a capacitor is a straightforward task that typically takes 15–30 minutes. You will need a screwdriver to remove the service panel, a pair of insulated needle-nose pliers, and a pair of insulated screwdrivers to discharge the old capacitor. Always ensure the power to the HVAC unit is completely shut off at the disconnect box before beginning.
Capacitors are heat-sensitive components. Over time, exposure to extreme outdoor temperatures, power surges, and the natural degradation of the internal dielectric material will cause them to weaken. Regular maintenance, such as keeping the condenser coils clean to ensure proper airflow, helps reduce the heat stress that leads to premature failure.
Yes. Capacitors store a lethal electrical charge even after the power is disconnected. Before touching the terminals, you must safely discharge the capacitor by placing an insulated screwdriver across the terminals (connecting the common terminal to the fan and herm terminals) to drain the stored energy.