BC557 PNP Transistor (TO-92)
The BC557 is a general-purpose PNP bipolar junction transistor (BJT) widely used in electronic circuits for amplification and switching applications. It is ideal for students, hobbyists, and electronics projects involving Arduino, sensors, LEDs, and low-current control circuits.
Its compact TO-92 package makes it easy to use on breadboards, PCBs, and prototype circuits.
Features
PNP Bipolar Junction Transistor (BJT)
General-purpose switching and amplification
TO-92 package
Low noise performance
Easy to solder and breadboard-friendly
Suitable for educational and DIY electronics projects
Applications
LED switching
Signal amplification
Relay driver circuits
Sensor interface circuits
Arduino and microcontroller projects
Audio circuits
Electronics learning and prototyping
Specifications
Model: BC557
Type: PNP Transistor
Package: TO-92
Collector-Emitter Voltage (VCEO): -45V
Collector Current (IC): -100mA (Max)
Power Dissipation: 500mW
Gain (hFE): 110–800 (depending on variant)
Pin Configuration
Emitter (E)
Base (B)
Collector (C)
Package Includes:
1 × BC557 PNP Transistor