BAT43 by STMicroelectronics Design and production,in TanJiayuan Electronics Spot sales,And can pass TanJiayuan Electronics Purchasing。BAT43 Price reference ¥ 1.551942。BAT43 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information BAT43 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial