BDX54B by STMicroelectronics Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。BDX54B Price reference $ 1.160000。BDX54B - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information BDX54B Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial