md4dMD4D Datasheet. Part #: MD400A08D4. Datasheet: 121Kb3P. Manufacturer: Jiangsu APT Semiconductor Co.,Ltd. Description: Rectifier Diode Modules. 73 Results.Last week, the Dital Impact Alliance (DIAL) and Data Pop Alliance made public a free on handbook on Mobile Data for Development (MD4D), available here on