The BC557B is a versatile PNP bipolar transistor from DIOTEC, available at Supreme Components International, your authorised distributor for electronic components. Encased in a TO-92 package, this transistor is designed for general-purpose amplification and switching applications. With a collector-emitter voltage (Vceo) of 45V and a collector current (Ic) of 100mA, the BC557B offers reliable performance in a wide range of circuits. Its low noise figure makes it suitable for audio amplification, while its fast switching speed enables efficient operation in digital circuits. The BC557B is a popular choice for hobbyists, students, and professionals alike due to its ease of use and availability. Supreme Components International guarantees the authenticity and quality of this DIOTEC transistor.