GE Brand [Lifetime Warranty] 70 uF MFD 370/440 VAC ±5% Round Run Capacitor 50/60 Hz AC Electric Replacement
BlueStars 70 uF 370/440 VAC round run capacitor with terminal connectors.
BlueStars 70uF 370/440 VAC round run capacitor with dimensions labeled 4.73 inches height and 2.36 inches diameter.
Specification chart for 70 uF 370/440 VAC round run capacitor with technical details and product image.
Top view of 70 uF round run capacitor showing 2-terminal layout with Common, Fan, and Hermetic compressor labels.
Infographic showing 70 uF 370/440 VAC round run capacitor features including aluminum case and metalized film construction.
Informational guide on choosing a 70 uF 370/440 VAC round run capacitor with product specifications.
BlueStars 70 uF 370/440 VAC round run capacitor shown in a promotional graphic with an HVAC technician.
70 uF 370/440 VAC round run capacitor for AC electric systems with technician performing maintenance in background.
Infographic showing 70 uF 370/440 VAC run capacitor applications for AC, refrigerator, heat pump, and compressor units.
Step-by-step installation guide for 70 uF 370/440 VAC round run capacitor replacement in AC units.
BlueStars 70 uF 370/440 VAC round run capacitor with terminal connectors.
BlueStars 70uF 370/440 VAC round run capacitor with dimensions labeled 4.73 inches height and 2.36 inches diameter.
Specification chart for 70 uF 370/440 VAC round run capacitor with technical details and product image.
Top view of 70 uF round run capacitor showing 2-terminal layout with Common, Fan, and Hermetic compressor labels.
Infographic showing 70 uF 370/440 VAC round run capacitor features including aluminum case and metalized film construction.
Informational guide on choosing a 70 uF 370/440 VAC round run capacitor with product specifications.
BlueStars 70 uF 370/440 VAC round run capacitor shown in a promotional graphic with an HVAC technician.
70 uF 370/440 VAC round run capacitor for AC electric systems with technician performing maintenance in background.
Infographic showing 70 uF 370/440 VAC run capacitor applications for AC, refrigerator, heat pump, and compressor units.
Step-by-step installation guide for 70 uF 370/440 VAC round run capacitor replacement in AC units.
Lifetime Warranty

[Lifetime Warranty] 70 uF MFD 370/440 VAC ±5% Round Run Capacitor 50/60 Hz AC Electric Replacement

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70/5 uF MFD 370-440 VAC Round Dual Run Capacitor

Key Features

  • Capacitance Rating: 70 + 5 Microfarad (uF/MFD)
  • Voltage Rating: 370 or 440 Volts AC (VAC)
  • Tolerance: ±5%
  • Frequency: 50 / 60 Hz
  • Shape: Round
  • Construction: Aluminum case with metallized polypropylene film
  • Terminals: Three terminals labeled C (Common), HERM (Compressor), and FAN
  • Operational Life: Tested for up to 60,000 hours of service life
  • Operating Temperature: -40°C to +70°C

Replaces / Cross-Reference Part Numbers

  • Replaces any round dual run capacitor with matching 70/5 uF MFD and 370V or 440V specifications.
  • Suitable replacement for parts from brands such as JARD, MARS, TEMCo, ClimaTek, Titan Pro, and others.
  • Common part numbers include: C3705R, TRCFD705, 97F9895, P291-7054R, CBB65-R.
  • Always verify physical dimensions (diameter and height) for proper fit.

Compatibility & Fitment

  • Designed for use in HVAC systems, including air conditioners and heat pumps.
  • Provides starting and running torque for a compressor motor (70 uF side) and a fan motor (5 uF side) in a single unit.
  • Compatible with units from major manufacturers provided the capacitance, voltage, and physical size specifications match the original part.

When to Replace

  • The compressor or fan motor hums but will not start.
  • The outdoor condenser unit fan spins slowly or requires a manual push to start.
  • Visible signs of failure on the existing capacitor, such as a bulging top, swelling, or oily residue leaking from the case.
  • The AC system is running but not blowing cold air.

Installation Tips

  • Warning: Disconnect all electrical power to the HVAC unit at the breaker panel and service disconnect before handling.
  • Safely discharge the old capacitor by shorting the terminals with a resistor or an insulated-handle screwdriver.
  • Note or photograph the wire connections to the C, HERM, and FAN terminals before disconnecting.
  • Install the new capacitor, ensuring it is secured by the original mounting bracket.
  • Connect the wires to the corresponding terminals on the new capacitor.

FAQ

Match the capacitance and voltage ratings on your original part. This replacement is for applications that require a 70 microfarad (70 uF / MFD) run capacitor rated for 370 VAC or 440 VAC, 50/60 Hz. The replacement should also match the terminal style and fit physically in the mounting bracket or strap used by your equipment.
Yes, in many cases a 440 VAC rated run capacitor can replace a 370 VAC capacitor if the microfarad rating is the same at 70 uF and the terminals and fit are correct. The voltage rating can be equal to or higher than the original, but the capacitance should stay matched to the equipment requirement.
Common signs include a motor that hums but does not start properly, hard starting, overheating, weak compressor or fan operation, intermittent shutdowns, or a breaker tripping during startup. In HVAC and similar AC motor applications, a failed run capacitor can also cause the motor to run inefficiently or stop altogether.
The ±5% tolerance means the actual capacitance value can vary within 5% of the stated 70 uF and still be within spec. That means an acceptable measured value is typically between 66.5 uF and 73.5 uF.
For someone experienced with electrical repairs, replacement is usually straightforward and may take about 15 to 30 minutes. Typical tools include a screwdriver or nut driver, needle-nose pliers, and a camera or phone to record wire placement before removal. Always disconnect power and safely discharge the capacitor before handling it.
Verify the original part's microfarad rating, voltage rating, terminal layout, and mounting style. Inspect the wiring connectors for looseness, heat damage, or corrosion. If this capacitor is used with a motor or compressor that has been overheating, also check for restricted airflow, seized bearings, dirty coils, failing contactors, or high amp draw that may have contributed to capacitor failure.
Common causes include heat exposure, age, voltage stress, power surges, excessive motor current, poor ventilation, and vibration. In HVAC and motor-driven equipment, a struggling fan motor or compressor can shorten capacitor life, so replacing the capacitor alone may not solve the problem if another component is causing overload.