12.5 uF MFD ±5% 370 VAC or 440 VAC CBB65 Oval Run Start Capacitor

12.5 uF MFD ±5% 370 VAC or 440 VAC CBB65 Oval Run Start Capacitor

Key Features

• Capacitance: 12.5 microfarads (uF/MFD)
• Tolerance: ±5%
• Voltage Rating: 370 VAC or 440 VAC
• Frequency: 50/60 Hz
• Operating Temperature Range: -40 °C to +70 °C
• Design: Oval shape, CBB65 model type
• Construction: Aluminum case with steel cover
• Terminals: Standard 1/4 inch male spade terminals
• Safety: Integrated pressure-sensitive interrupter

Replaces / Cross-Reference Part Numbers

This is a universal replacement for single run capacitors with matching specifications. To ensure a correct match, verify the following on your original capacitor:

• Capacitance: 12.5 uF or 12.5 MFD
• Voltage: 370V or 440V (a 440V rated capacitor can safely replace a 370V)
• Shape: Oval (ensure physical dimensions allow for proper mounting)

Compatibility & Fitment

Used in a wide range of single-phase motor applications, including:

• HVAC compressors and condenser fan motors
• Air conditioning units
• Heat pumps
• Furnace blower motors
• Pool and well pump motors
• Other AC motor run applications

When to Replace

A failing capacitor can cause motor issues. Consider replacement if you observe the following symptoms:

• Motor hums but does not start or struggles to start
• Fan or compressor does not engage
• Visible damage to the existing capacitor, such as a bulging top or fluid leakage
• Capacitance measurement is outside the ±5% tolerance range

Installation Tips

• Disconnect all electrical power to the equipment before servicing.
• Safely discharge the existing capacitor by shorting the terminals with a properly insulated tool.
• Confirm the capacitance (uF/MFD) and voltage rating of the new capacitor match the original part's requirements.
• Note the wiring configuration before removing the old capacitor.
• Ensure the new capacitor is securely mounted and all terminal connections are tight.