data 5dMarking: 5D. Part #: BAS516. Package: SOD-523. Datasheet: 188Kb4P. Manufacturer: Galaxy Semi-Conductor Holdings Limited. Description: Hh Speed Switching Diode. 202SPhotonix is a privately funded spin-off venture, founded upon the ground breaking research led by the inventor of 5D Memory, Peter Kazansky from the University of Southampton.