SR4D4018 by TE Connectivity Design and production,in Chengze Electronics (Beijing) Co., Ltd. Spot sales,And can pass Chengze Electronics (Beijing) Co., Ltd. Purchasing。SR4D4018 Price reference $ 20.500920。SR4D4018 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information SR4D4018 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial