The FC9577 SOT-23 Bipolar Transistor is a RoHS-compliant device manufactured by Guoxin Jiapin Semiconductor. This transistor is a small-signal NPN type that features a low collector-emitter saturation voltage, high hfe, and current gain linearity. This transistor's design and construction are optimized for low noise, stability, and low operating current. The FC9577 has a maximum collector-emitter voltage of 80V, collector-emitter voltage of 50V, and a peak collector current of 400mA. This transistor is suitable for applications such as voltage regulators, relays, signal amplifiers, oscillators, and pulse circuits.