- Aug 25, 2007
I'm late getting back to this party, but that's not totally correct. There is an extra bond wire, but the die is exactly the same size. The die itself is visually indistinguishable between all 3 types. The submount is a little different, the die itself is not.The answer is the M and H series diodes are much more efficient than the A series diodes. They have an extra bond wire and a larger die. Most all M and H diodes can hit 2W+ with a single element lens and 1.8A current.