STS4DPF20L by STMicroelectronics Design and production,in TanJiayuan Electronics Spot sales,And can pass TanJiayuan Electronics Purchasing。STS4DPF20L Price reference ¥ 8.357725。STS4DPF20L - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information STS4DPF20L Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial