I bought a bunch of POLARIZED caps of different values for my Sherwood restoration, they all have a + sign on one end, these 100 uF caps do not but instead have stripe down one side. Do the arrows indicate the negative or positive end?
On this cap, the negative is labeled. With a ”negative” sign inside the arrow. On some brands a plus sign is used, perhaps arrows pointing toward that end. With axial caps, the dimpled end is almost always positive. And the end with a solid aluminum can is always negative, with the rubber seal on the positive end. So even if the plastic wrapper were missing you could figure it out. Sometimes the case if you are replacing an old cap. With radials you have to rely on a marking.
OP edited his post for some reason after I answered, which has made my answer look tautological. It wasn't.
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Those types of caps used to be coded by a plain, thick black line down the length next to the (-) lead.
But some didn't get that, or worse, thought it actually meant the positive side.
So then the line was changed into arrows with minus signs. It has to be language independent and graphic,
since the parts are sold in many countries.
Aside from the -negative- sign INside the arrow:
Which end lead is welded to the case? Which enters a rubber plug? Compare to polar caps you are not confused by.
(Yes, this fails when both leads come out one end.)
Which end lead is welded to the case? Which enters a rubber plug? Compare to polar caps you are not confused by.
(Yes, this fails when both leads come out one end.)