BC557 PNP General Purpose Transistor

The BC557 is a general-purpose PNP bipolar junction transistor (BJT) designed for use in switching and amplification applications. Its compact size and reliable performance make it ideal for low-power circuits, audio applications, and signal amplification.

Key Features:

• Type: PNP Bipolar Junction Transistor (BJT)
• Voltage Ratings:
  • Collector-Emitter Voltage (V_CE): 45V
  • Collector-Base Voltage (V_CBO): 50V
  • Emitter-Base Voltage (V_EBO): 5V
• Current Ratings:
  • Collector Current (I_C): 100mA
• Gain (h_FE): 110 to 800
• Package Type: TO-92 (Plastic)

Applications:

• Signal amplification
• Audio and voltage amplifier circuits
• Switching low-power loads
• General-purpose electronics projects

Pin Configuration:

1. Emitter (E) – Connected to the negative side of the circuit
2. Base (B) – Controls the transistor’s operation
3. Collector (C) – Connected to the load

The BC557 is a reliable PNP transistor used for medium and low-power switching and amplification applications. It’s ideal for hobbyists, students, and professionals working with analog circuits and low-power electronics.