[Lifetime Warranty] 30+5 uF MFD 370/440 VAC Round Dual Run Capacitor - Fits Condenser, Heat Pump - Replaces TRCFD305, 97F9833 - Pack of 2
Two 30+5 uF 370/440 VAC round dual run capacitors for condenser and heat pump units.
BlueStars 30+5 uF 370/440 VAC round dual run capacitor with technical specifications infographic.
30+5 MFD 370/440 VAC round dual run capacitor with 3.75 inch height and 1.96 inch diameter dimensions.
Infographic showing AC unit symptoms for 30+5 uF dual run capacitor replacement.
BlueStars 30+5 uF 370/440 VAC round dual run capacitor with technical specifications label.
Infographic showing a 30+5 uF 370/440 VAC round dual run capacitor with a close-up of the terminal connectors.
Woman relaxing on a couch under an air conditioner with BlueStars DIY HVAC repair promotional text.
Two 30+5 uF 370/440 VAC round dual run capacitors for condenser and heat pump units.
BlueStars 30+5 uF 370/440 VAC round dual run capacitor with technical specifications infographic.
30+5 MFD 370/440 VAC round dual run capacitor with 3.75 inch height and 1.96 inch diameter dimensions.
Infographic showing AC unit symptoms for 30+5 uF dual run capacitor replacement.
BlueStars 30+5 uF 370/440 VAC round dual run capacitor with technical specifications label.
Infographic showing a 30+5 uF 370/440 VAC round dual run capacitor with a close-up of the terminal connectors.
Woman relaxing on a couch under an air conditioner with BlueStars DIY HVAC repair promotional text.
Lifetime Warranty

[Lifetime Warranty] 30+5 uF MFD 370/440 VAC Round Dual Run Capacitor - Fits Condenser, Heat Pump - Replaces TRCFD305, 97F9833 - Pack of 2

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30+5 uF/MFD 370-440 VAC Volts Round Dual Run Capacitor

Key Features

  • Capacitance: 30 + 5 Microfarad (uF/MFD)
  • Tolerance: ± 5%
  • Voltage: Dual Rated 370 or 440 VAC
  • Frequency: 50/60 Hz
  • Operating Temperature: -40°C to +70°C (-40°F to 158°F)
  • Construction: Round, oil-filled aluminum case
  • Terminals: 3 terminals labeled C, HERM, and FAN
  • Safety Standard: 10,000 AFC Protected

Replaces / Cross-Reference Part Numbers

  • This capacitor replaces any round 30/5 uF 370V or 440V dual run capacitor. While this is not an exhaustive list, it is a direct replacement for part numbers including: 97F9833, C3305R, C4305R, P291-3054R, TRCFD305, USA2227, and CBB65.

Compatibility & Fitment

  • Used in air conditioning units, heat pumps, condensers, and other HVAC systems to start and run a compressor motor (30 uF) and a fan motor (5 uF) simultaneously.
  • To ensure compatibility, match the specifications of your original capacitor:
  • Capacitance: Must be 30+5 uF/MFD.
  • Voltage: Must be 370V or 440V. This 440V capacitor can safely replace a 370V capacitor.
  • Shape & Size: Must be a round capacitor with similar dimensions to fit the mounting bracket.

When to Replace

  • Your outdoor unit hums but the fan does not spin or the compressor will not start.
  • The fan or compressor motor starts slowly or not at all.
  • The original capacitor shows physical damage, such as a bulging top, swelling, or fluid leaks.

Installation Tips

  • Disconnect all electrical power to the HVAC unit before handling.
  • Safely discharge the existing capacitor by shorting across the terminals with an insulated screwdriver.
  • Take a picture or note the wire placement on the C, FAN, and HERM terminals before disconnecting.
  • Connect the new capacitor by matching the wires to the corresponding terminals.

FAQ

This capacitor is used in many residential outdoor A/C condensers and heat pumps that require a round dual run capacitor rated at 30/5 MFD and 370/440 VAC. The 30 uF section typically supports the compressor and the 5 uF section typically supports the condenser fan motor. Match all key specs on your original part: 30/5 MFD, dual run style, round can, and a voltage rating of 370/440 VAC.
This replacement fits applications using part numbers TRCFD305 and 97F9833. Always confirm the capacitance and voltage ratings on the original capacitor label before ordering.
Common symptoms include the outdoor unit humming but not starting, the condenser fan not spinning, the compressor failing to start, intermittent shutdowns, weak cooling, or a swollen/leaking capacitor can. A failed 30/5 capacitor can affect either the compressor side, the fan side, or both.
Yes, in many HVAC applications a 440 VAC capacitor can replace a 370 VAC capacitor if the capacitance value is the same. This part is dual-rated 370/440 VAC, so it is commonly used where the original was marked 370 VAC or 440 VAC, provided the MFD rating is still 30/5.
Installation is usually straightforward for someone familiar with HVAC electrical safety. Typical tools include a screwdriver or nut driver, needle-nose pliers, and a camera or phone to document wire placement before removal. Most replacements take about 10 to 20 minutes. Power must be shut off at the disconnect and breaker, and the old capacitor must be safely discharged before touching the terminals.
Verify the old capacitor's label for an exact 30/5 MFD rating and confirm the terminal layout, usually marked C, FAN, and HERM. It is also smart to inspect the condenser fan motor, compressor wiring, contactor, and terminals for overheating or corrosion. If a new capacitor fails quickly, the underlying issue may be a weak motor, compressor hard-start condition, high heat, or electrical problems in the unit.
They commonly fail from heat, age, voltage stress, long run times, and vibration in the outdoor unit. In condenser and heat pump service, high ambient temperatures and restricted airflow can increase stress on the capacitor. Bulging, oil leakage, or capacitance readings outside tolerance are common signs the part has reached the end of its service life.