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∙ 13y agoTypically a bad capacitor is a sign of a weakening Compressor in the unit. Rule of thumb: If the unit is 20+ years old, you would be putting a band aid on it by replacing the capacitor. If you decide to try and get by with an older system for a few more seasons, I recommend to put a new capacitor on the unit with a hard start system installed on the compressor. You can normally have this done for under $300.00. And back to your question; capacitors are sized depending on the size of the unit. Check your tonage of the unit and bring the capacitor with the correct tonage to a Parts house and they will make sure it is properly sized. Hope this helps.
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∙ 13y agoIf, by smaller in size, you mean physical size, then yes. You just need to keep the same capacitance and minimum voltage rating. Also, in a power supply filter application, you need to consider the maximum RMS current rating.
A: Polarized capacitors can be smaller in size as compared to a non polarized in the same capacity
It should say on the compressor and the fan motor labels.
Read the capacitor that you remove
If same size, yesIf same size, yes
Capacitors come in various sizes, your question is to non specific (capacitor for WHAT) for a detailed answer.
Well... Maybe yes, maybe no. It depends on two things. First, the physical size of the non-polarized capacitor may well be larger than the original size of the polarized capacitor, so it might not fit. Second, you have to consider the RMS current rating of the capacitor. Often, a polarized capacitor, such as an electrolytic capacitor, is intended to be used in a power supply, and is rated for a certain RMS current. A non-polarized capacitor, however, might not be rated for the same or higher RMS current, so it would not be able to handle the load.
89M77 40+5MFD-440VAC dual run capacitor
Capacitors come in various sizes, your question is to non specific (capacitor for WHAT) for a detailed answer.
A: Capacitance vary directly with the area applied the bigger the area the bigger the capacitor. There is another element that will increase the size that is the rating of the capacitor voltage since more material will have to be used to insulate the plates
A capacitor is a device that stores an electrical charge, or if you prefer- resists any change in voltage applied to it. Capacitance is a measure of the size or ability of a capacitor to do that. This is the Farad
35mfd/440V