SM4T30AY by STMicroelectronics Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。SM4T30AY Price reference $ 0.311850。SM4T30AY - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information SM4T30AY Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial