The MMBT3904 NPN bipolar transistor manufactured by GOODWORK is a SOT-23 sized transistor with a -55? to +150? (Tj) operating temperature range. It is ROHS-certified and has a Collector-Emitter Voltage of 40V and a Collector Emitter Saturation Voltage of 300mV@50mA, 5mA. It has a 100nA Collector-Base Voltage and a 200mA Collector Current with a 100@10mA Current Gain. The Power Dissipation is rated at 225mW and the Frequency is rated at 100MHz.