These diodes are mounted into a heat sink (3 diodes). It looks like this ebay listing.
Obviously these diodes are connected individually by the studs and nuts. But what does the other side of them connect to? Are they just connected to the heat sink?
Which end is anode / carthode?
I'm looking to replace the blown diodes in a 12V 50A automotive battery charger. (I only need 2 diodes). But I was told that alternator diodes are ideal for this application. If only I know how they are wired and the polarity. I'm sure the heat sink would be a plus too.
I'm a bit puzzled why they have 3 diodes on these "blocks". Normally 2 diodes are used, for a power supply, or four if it's a bridge rectifier setup. Three seems weird....
Thanks