How to select the correct AC Capacitor?
Replacing the correct starting or run capacitor should be fairly easy. Match the voltage and capacitance of the failed capacitor with the replacement, and check the measurements of the selected capacitor to verify that it will fit within the space available.
A capacitor will commonly be round, but they may be oval shaped as well. An oval dual run capacitor could be used instead of a round capacitor, as there is no electrical difference between the two. As long as the replacement will fit within the space provided, the case shape makes no difference. If it does not fit, the mounting strap can be changed to better fit the oval shape.