The 2SB624-BV4 is a SOT-23 type RoHS compliant Transistor manufactured by KEXIN. It is a NPN bipolar junction transistor with a maximum voltage of 30 volts and a continuous collector current rating of 300 mA. It is typically used as an amplifier, oscillator, or switch in a wide variety of electronic devices. It has a high gain of 400 and a collector-emitter saturation voltage of 0.2V. This transistor also has an excellent gain-bandwidth product and low noise level, making it suitable for such applications as audio amplifiers or low-power RF circuits.