I am using a high voltage diode (APTDF400U120G) to freewheel an inductor in a switching circuit. It has four terminals, two for either side of the diode. I cannot figure out why this is. If I only connect to one input and one output terminal will the rating of the diode be lowered from the listed 400A? What is the purpose of four terminals?

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    Post a picture and a link to the datasheet so we all know what you are talking about. – Transistor Dec 3 at 22:10

For both redundancy and reduced overall inductance. You really don't want to have a loose connection being a single point of failure in a 400 A circuit!

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