BC308 PNP BJT Transistor TO-92

The BC308 is a PNP bipolar junction transistor (BJT) in a compact TO-92 package, optimized for general-purpose amplification and switching in analog and digital circuits. Known for its low noise, dependable performance, and wide hFE linearity, it’s a versatile choice for electronics components in Arduino, Raspberry Pi, and other microcontroller-based projects, as well as professional designs.

Key Features ✨

• ✔️ PNP polarity for high-side switching and low-noise amplification
• ✔️ High voltage capability within compact TO-92 form factor
• ✔️ Low noise figures ideal for audio and signal-conditioning stages
• ✔️ Outstanding hFE linearity for cleaner gain and predictable biasing
• ✔️ TO-92 package for easy through-hole mounting and prototyping

Technical Specifications 🔧

• Polarity: PNP
• Package: TO-92 (through-hole)
• Collector–Emitter Voltage (VCEO): -25 V
• Collector–Base Voltage (VCBO): -30 V
• Emitter–Base Voltage (VEBO): -5 V
• Collector Current (IC): -100 mA (max)
• Power Dissipation (PD): 500 mW (max)
• DC Current Gain (hFE): 120 to 800
• Transition Frequency (fT): 130 MHz

Typical Applications 🧩

• General-purpose amplification in low-level and medium-gain stages
• Switching operations for control signals and high-side drivers
• Audio amplifiers and preamplifier stages with low noise
• Signal processing and sensor interfacing
• Power management control circuits and bias networks

Integration Tips for Arduino/Raspberry Pi 🔌

• Use a base resistor to set bias or switching current when driven by a microcontroller GPIO.
• Observe PNP orientation (emitter toward the positive rail) for reliable high-side switching.
• Keep within PD and IC limits; add a heat sink or reduce duty cycle if needed.
• For high-frequency use, consider fT = 130 MHz and layout to minimize parasitics.

Why Choose the BC308? ✅

Combining low noise, broad gain range, and a rugged TO-92 form factor, the BC308 is an excellent drop-in choice for analog front ends, signal conditioning modules, and educational projects requiring dependable PNP BJT performance at modest voltages and currents.

Datasheet 📄

BC308 datasheet available upon request. Contact us for manufacturer documentation and detailed characterization curves.