Will this capacitor work?

I do not see any reasonthat it would not work. It is a motor run capacitor. The uF is the same and the voltage rating is as high or higher (much higher in this case). While not really important in your cse, the temperature rating is 85 deg C. It would be better if it was over 100 deg C. That just usually indicates a bette capacitor, but not really needed in your case.

It looks ok, with one possible problem. The capacitor should be non-polarized.

aluminium electrolytic capacitors [4] with non solid electrolyte and therefore they are only applicable for the short motor starting time. I dunno about the "non solid electrolyte" since the capacitor in question is a "solid" polypropylene metallized film dielectric. Oh well.

I can't tell from the Farnell data sheet whether it's an NP cap. So, I found the original C87 series data sheet at: It doesn't specifically say non-polarized, but the lack of polarity markings and an "AC" voltage rating, indicates that it's probably NP. Yes, it should work.

I'd like to pass some of your help ethic on to Phil. But I'm afraid it would take a massive dose, and end up harming your superpower! Luv you Jeff, Mikek :-)

The capacitor in question was listed as a motor RUN capacitor,not start.

The top of the data sheet says RUN so the non-polarized electrolyte part should not be in question.

Yeah... I love this group. It's been years since I've been here and I'm super happy that it's still going and not wrecked by trolls.

Thanks guys!

?F

Do you have any photos of your rollup door? I'm wondering if it is the same make as my old 1970s vintage door on my midway rifle gallery game.

I've put a few pictures of my door motor here:

John :-#)#

Oops. I stand corrected. I wasn't paying attention to the differences between start and run capacitors.

Run vs. Starting Capacitor

In any case, the data sheet is the correct one for a run capacitor:

Yup, nearly identical. Same gears for the limit switches. (pain in the ass :- )