A50L-0001-0175
FANUC A50L-0001-0175 transistor. This Fuji Electric 6DI120C-060 is a power transistor module rated at 120 amp 600 volt and part of the 6DI series. The transistor is a special version of the 6DI in a package (shape/size) specified by FANUC for their own AC spindle drives.
Namely the yellow frame digital S, I, P and early serial spindle amps.