3 uF/MFD ±5% 370-440 VAC Oval Run Start Capacitor

3 uF/MFD ±5% 370-440 VAC Oval Run Start Capacitor

Key Features

• Capacitance: 3 Microfarad (uF/MFD)
• Tolerance: ±5%
• Voltage Rating: 370-440 VAC (replaces both 370V and 440V capacitors)
• Frequency: 50/60 Hz
• Shape: Oval
• Operating Temperature: -25°C to +70°C (-13°F to 158°F)
• Construction: Non-PCB, oil-filled case
• Terminals: Standard 1/4 in. male spade terminals

Replaces / Cross-Reference Part Numbers

• Replaces any single oval capacitor with matching 3 uF/MFD and 370V or 440V specifications.
• Verify physical dimensions for proper fit.

Compatibility & Fitment

• Used for motor run applications in single-phase motors.
• Commonly found in HVAC units, air conditioners, compressors, furnace blower motors, and pool pumps.
• The dual 370/440V rating makes it compatible with systems specifying either voltage.

When to Replace

• Motor hums but fails to start or struggles to start.
• Fan blades or blower wheel turns slower than usual.
• Compressor or fan motor does not turn on.
• Visible bulging, swelling, or leaking from the capacitor case.

Installation Tips

• Disconnect all electrical power to the equipment before servicing.
• Safely discharge the existing capacitor by shorting the terminals with an insulated screwdriver.
• Note the wire placement on the old capacitor's terminals before removal.
• Ensure the replacement capacitor's microfarad (uF/MFD) rating matches the original exactly.
• The voltage rating of the replacement capacitor must be equal to or higher than the original.