35+10 uF 35/10 MFD ±5% 370-440VAC Volts CBB65 CBB65B Dual Run Start Round Capacitor

Key Features

• Capacitance: 35 + 10 Microfarad (MFD/uF)
• Voltage Rating: 370 or 440 Volts AC (VAC)
• Capacitance Tolerance: ±5%
• Operating Frequency: 50 / 60 Hertz (Hz)
• Shape: Round
• Case Material: Aluminum
• Terminals: 1/4 inch male quick-connects (C, FAN, HERM)
• Operational Temperature Range: -40°C to +70°C
• Safety Standard: UL 810 approved; pressure-sensitive interrupter

Replaces / Cross-Reference Part Numbers

• Replaces any round 35/10 MFD dual run capacitor with a 370V or 440V rating.
• Common part numbers include: P291-3514R, CBB65, C33510R, PRC3510, 97F9836, TRCD3510, CPT00666.

Compatibility & Fitment

• Designed for HVAC applications including air conditioners, heat pumps, and condenser units.
• Simultaneously provides starting and running power to a compressor motor (35 MFD) and a fan motor (10 MFD).
• Fits units from major brands including Carrier, Goodman, Trane, Lennox, Rheem, and Ruud when specifications match the original component.

When to Replace

• The capacitor case is physically swollen, bulging, or leaking oily fluid.
• The compressor or fan motor hums but will not start.
• The fan blades turn slowly or must be started by hand.
• A multimeter test shows capacitance values outside the ±5% tolerance range.

Installation Tips

• Disconnect all electrical power to the unit before beginning work.
• Safely discharge the old capacitor by shorting across the terminals with an insulated tool.
• Confirm the MFD ratings match the original capacitor exactly. The voltage rating of the new capacitor must be equal to or higher than the original.
• Note the wire placement on the C (Common), FAN, and HERM (Hermetic/Compressor) terminals before removal.
• Secure the new capacitor with the original mounting bracket to prevent vibration.