Why does this capacitor have 4 terminals?

Thread Starter

Paul Hemans

Joined Jul 8, 2015
4
Attached image is a Green-cap 500F 2.7V capacitor mh47765
I don't understand the connections. One is obviously "-" and another (opposite) is marked as "+", are the other 2 just for support on a circuit board? They have no markings that would indicate it functions like this;
http://www.hificollective.co.uk/components/claritycap_tc_4terminal.html

They are also equidistant from the "+" terminal.

Thanks.
 

Attachments

recklessrog

Joined May 23, 2013
985
Depending on the manufacturer, two are only for support when soldered into a pcb. sometimes two are pos and two are neg check with an ohmmeter if you have two pairs connected together.
The one in the photo shows the neg towards you, the pos is probably the one opposite. the other two are probably not connected and just for fixing.
 

dl324

Joined Mar 30, 2015
16,846
You should check the manufacturer datasheet for the correct usage of the dummy terminals. Some are required to make no electrical connection because they are resistively connected to the negative terminal through the electrolyte.
 
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