CAP04.5 Generic 4.5uF Capacitor Universal Appliance Part, Small Motor Capacitor Replacement

Stock code CAP04.5 is a generic 4.5uF capacitor, a universal part for appliances where the original capacitor has failed. Values around this size are common on small single phase motors, such as fan motors in rangehoods, air conditioners and pedestal fans. Compare the photo with your old capacitor's markings, terminals and mounting before you order, and check the voltage rating suits your appliance.

When a small motor capacitor gives out

Small capacitors help single phase motors start and keep them running at the right speed and direction. When one loses capacitance, the motor may hum without turning, need a flick to get going, run slowly, or overheat and cut out. A fan that spins at a fraction of its normal speed is a classic sign. Physical damage such as a bulging end or split case confirms it, though many fail without visible marks. Testing the capacitance gives a clear answer before you swap the part.

Part details

• Generic universal capacitor
• 4.5uF capacitance
• Suits small single phase motors
• Stock code CAP04.5

Fitting tips

Unplug the appliance or isolate the circuit, then discharge the old capacitor before touching it. Note which wires connect to each terminal. Fit the new capacitor in the same position and secure it so it can't vibrate against other parts. Any hard-wired or fixed equipment should be repaired by a licensed electrician.

Questions about this part

Does the voltage rating matter?

Yes. The replacement's voltage rating must be equal to or higher than the original's. The capacitance, 4.5uF here, should match the original exactly. Check the markings on your old capacitor and compare them before ordering.