The answer to can you use a 250v cap with a line voltage of 120v? NO, you have to think in terms of peak to peak for component selection.
Voltage measurements are in RMS or root means square the peak to peak value is ~2.8 x the rms value 120x2.8=336 so a 350v cap is needed.
Next that 3.5uf cap has 3 leads this normally means 2 capacitors if only 1 value is provided both are the same so your cap has a cap from the red to white and a second cap from the red to the other white, this is a common configuration.
I purchase components on eBay and Amazon all the time but I understand the values and tolerances in many cases I get the exact same brand ,component value and voltage component as the one I am replacing. I do have an LCR meter to measure components like this and the parts have been within the stated tolerance.
I found several 3+3.5+6 fan caps for under 10$ online these have a common that would connect where your red wire did and the 3uf on one white the 3.5 on the other white and put some tape on the 6uf one. I have purchased parts like this many times 6.99$ And now the fan works where the exact component was 35-89$ . The OEM’s in some cases have unique parts that you can only get through them and you have to pay the markup. A slight difference (Micro farids) uf in this case for a motor won’t matter it will work.
Answer:
This fan is not that quiet and tough to mount, keyholes are reversed to each other which is so stupid, and the outlet is in the way of joists... it took me 2 hours to redo joists to make it fit, I'd return it if I hadn't had to cut off part of the outlet to make it fit.
Jim
· June 27, 2019
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