Welcome back, Joey. I remember measuring these diodes for you, but have measured so many more since then it is difficult to remember specifics about them. Fortunately, I have kept a log of all the iterations of this diode I have measured. These are, indeed, case neutral. The pin out on them is the same as the M140 diodes. That is a very good price for binned diodes in this wavelength that don't need a case positive driver. Good luck on your sale. :yh: