Bc548 Is General Purpose Silicon, Npn, Bipolar Junction Transistor. It Is Used For Amplification And Switching Purposes. The Current Gain May Vary Between 110 And 800. The Maximum DC Current Gain Is 800 Transistor number: BC548 Polarity: NPN Transistor type: Amplifier Transistor Package: TO-92 Number of pins: 3 Package contains: BC548 NPN Transistor Specification Collector-base voltage: 30V Collector-emitter voltage: 30V Emitter-base voltage: 5V Collector current: 100mA Collector power dissipation: 500mW Temperature: -65 to 150 °C