45+5 uf/MFD 370 or 440 Volt VAC Round Dual Run Capacitor CBB65 50/60 Hz

45+5 uf/MFD 370 or 440 Volt VAC Round Dual Run Capacitor CBB65 50/60 Hz

Key Features

• Model: CBB65
• Capacitance: 45 + 5 Microfarad (uF/MFD)
• Capacitance Tolerance: ±6%
• Voltage Rating: 370V or 440V AC
• Frequency: 50/60 Hz
• Shape: Round
• Construction: Aluminum Case
• Operating Temperature: -40 °C to +70 °C (-40 °F to +158 °F)
• Terminals: 3 (C, HERM, FAN)
• Safety Standard: EIA-456 Compliant

Replaces / Cross-Reference Part Numbers

This capacitor replaces any round or oval dual run capacitor with matching 45+5 uF capacitance and 370V or 440V specifications. It serves as a universal replacement for a wide range of part numbers from various manufacturers.

Compatibility & Fitment

Designed for heavy-duty, continuous use in HVAC systems such as central air conditioners and heat pumps. This dual run capacitor powers a compressor motor (HERM terminal) and a fan motor (FAN terminal) simultaneously from a single common line (C terminal). It is compatible with units requiring the specified capacitance and voltage.

When to Replace

A failing capacitor can cause damage to motors. Consider replacement if you observe the following symptoms:

• Compressor or fan motor struggles or fails to start.
• AC unit hums but does not activate.
• Fan spins slowly or not at all.
• Visible signs of damage, such as a bulging or leaking capacitor case.
• Measured capacitance is outside the rated tolerance (e.g., not within ±6% of 45/5 uF).

Installation Tips

• Warning: Capacitors can store a lethal electrical charge even when power is off.
• Disconnect all electrical power to the HVAC unit at the main breaker panel before proceeding.
• Safely discharge the old capacitor by carefully shorting across the terminals with an insulated-handle screwdriver.
• Confirm the uF and VAC ratings of the replacement match the original component.
• Note the wire placement on the C, FAN, and HERM terminals before disconnecting.
• Ensure all new connections are secure. Professional installation by a qualified technician is recommended.