What is bc 557?

The BC557 is a PNP Bipolar Junction Transistor (BJT) used for low power switching and amplification applications. It is a versatile transistor that can be used for a wide range of applications. The BC557 is typically used as a general-purpose amplifier, switch, and audio frequency driver. This transistor has a maximum collector current (Ic) of 100mA and a maximum collector-emitter voltage (Vce) of 45V. The BC557 is housed in a TO-92 package, which makes it easy to use in a variety of circuits. Some of the features and specifications of the BC557 are:

• Low Current (Maximum Ic = 100mA)
• Low Voltage (Maximum Vce = 45V)
• Medium Power (Maximum Power = 625mW)
• PNP Type
• TO-92 Package
• hFE Range: 200-800

Overall, the BC557 is a popular transistor used in a range of applications due to its versatility and medium power handling capabilities.