Help identifying dead electro. cap polarity?
Sparky wrote:
This cap was removed from a 70's-80's German industrial machine:
http://i37.tinypic.com/10psxg3.jpg
It has no polarity markings. One terminal is common with the metal case. Is
this always an indication of the (-) terminal?
The base has molded terminal locations numbered 1-4, two of which are empty:
http://i36.tinypic.com/e6x542.jpg
Markings on the side a
B41111-B7108-T
1000uF 40V-
GERMANY
GPF DIN 41332 06.78
I find a few references to a Siemens part that is similar:
http://www.screenghost.com/shop/show.asp?ID=74#
but no datasheet can I find. Can someone more resourceful than I find one?
I cut open one of these caps. It is paper & foil (or so it seems) spiral wrap
construction. Can polarity be determined by internal construction? Is the
center terminal always one pole (ie, always +)?
Thanks.
How is it wired in the circuit? When in doubt, this is what I look at.
You can also substitute it with an AC rated cap and just measure the
voltage across it to find out which way around it should be.
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