BC557 PNP Transistor

The BC557 is a widely used PNP bipolar junction transistor (BJT) ideal for general-purpose low-power amplification and switching applications. It's the complementary pair of the popular BC547 NPN transistor and is commonly found in audio circuits, analog designs, and sensor interfacing.

With a maximum collector current of 100mA and low saturation voltage, the BC557 works well for low-voltage, low-current applications in hobby electronics, DIY projects, and embedded systems using Arduino, ESP32, or Raspberry Pi.

It comes in a TO-92 package, making it breadboard-friendly and easy to integrate into any project.

🔧 Features:

• Type: PNP Bipolar Junction Transistor

• Max Collector Current: 100mA

• Collector-Emitter Voltage: -45V

• Max Power Dissipation: 500mW

• TO-92 package for easy prototyping

• Complementary to BC547 (NPN)

🎯 Applications:

• Low-power signal amplification

• Switching circuits

• Analog signal control

• Audio electronics

• Arduino and sensor interfacing

• Robotics, IoT, and DIY electronics