BC 548

The BC548 is a widely used NPN bipolar junction transistor (BJT) designed for low-power signal amplification and switching applications. It is popular in electronics projects, audio circuits, and general-purpose analog designs due to its reliability, low noise, and compact size.

Key Features

• Type: NPN Bipolar Junction Transistor

• Low noise performance

• Suitable for signal amplification

• High current gain (hFE)

• Low power consumption

• Compact TO-92 package

• Cost-effective and easily available

Technical Specifications

• Collector-Emitter Voltage (Vce): 30V

• Collector-Base Voltage (Vcb): 30V

• Emitter-Base Voltage (Veb): 5V

• Maximum Collector Current (Ic): 100mA

• Power Dissipation: 500mW

• DC Current Gain (hFE): 110 – 800 (varies by grade)

• Operating Temperature: -55°C to +150°C

Pin Configuration (TO-92 Package)

(Flat side facing you, legs downward)

1. Collector

2. Base

3. Emitter

Applications

• Audio pre-amplifiers

• Signal amplification circuits

• Switching circuits

• Oscillators and multivibrators

• Sensor interface circuits

• DIY electronics and student projects

• General low-power electronic designs

Why Choose BC548?

• Ideal for beginner and professional electronics

• Stable and dependable performance

• Perfect replacement for many small-signal NPN transistors

• Commonly used in educational kits and hobby projects