The BC817 25 from Hunan Jingxin Microelectronics is a Bipolar Junction Transistor with Collector Base Voltage 50 V, Continuous Collector Current 500 mA, DC Current Gain 160 to 400, Gain Bandwidth Product 100 MHz, Power Dissipation 0.3 W. Tags: Surface Mount, NPN Transistor. More details for BC817 25 can be seen below.