4 pin capacitor help

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+Ve, -Ve, and 2 dummy pins.

(you could read the product datasheet instead of asking)
http://docs-europe.electrocomponents.com/webdocs/0032/0900766b80032119.pdf
You must look carefully at the diagrams on the top of datasheet page 2 to notice that only two pins are marked with the " + " or " - " legend, and there is a reference to "dummy pins" in the text below the figures. In my opinion, the datasheet needs a more explicit identification of the "dummy pins". They are almost certainly there to improve the mechanical attachment and make the component less vulnerable to vibration, shock, etc.

Dale
 
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