The MMBT3904 with 40V 200mW 100@10mA, 1V 200mA NPN SOT-23 Bipolar Transistors - BJT ROHS manufactured by Jingdao is a small signal transistor designed for use in automotive, industrial, communications, and other applications. It features a NPN design, an SOT-23 package, and a maximum operating voltage of up to 40V. Its power rating is 200mW, and its collector current is 100@10mA. Other features include a 1V emitter-collector voltage requirement and 200mA maximum collector current. This is a RoHS-compliant device.