Capacitor Polarity

I recently purchased a polarized capacitor, but it does not indicate the positive or negative side. I noticed one end of the cap had a small indented "neck" around it. Does this indicate polarity in any way?

Posted by Anonymous on 23/01/2005, at 11:45 GMT

Capacitor polarity

On axial capacitors (one lead at each end) the end with the 'neck' is positive.

On radial capacitors (both leads at the same end) the longer lead is positive.

Most are clearly marked, so the one you have is unusual!

Posted by John Hewes on 24/01/2005, at 13:53 GMT

Capacitor Polarity

There may be a band on the case sheathing that indicates the negative lead (usually).

Posted by Robert Neill (varient412@yahoo.co.uk) on 15/10/2010, at 15:04 GMT