Table of Contents
Introduction:
The BC548 is a widely used NPN bipolar junction transistor (BJT) commonly employed in low-power amplification and switching applications. Known for its versatility and reliability, it features a maximum collector current of 100mA, a voltage rating of 30V, and a current gain (hFE) range of 110 to 800. The BC548 is popular in hobbyist projects and industrial circuits due to its affordability and ease of use. It typically operates in three regions: cutoff, active, and saturation, making it suitable for diverse electronic designs.
BC548 Pin Configuration:
Pin Configuration (TO-92):
- Pin 1 (Collector): Current enters the collector.
- Pin 2 (Base): Controls the transistor’s operation.
- Pin 3 (Emitter): Current exits the emitter.
| Pin Number | Pin Name |
|---|---|
| 1. | Collector |
| 2. | Base |
| 3. | Emitter |
Bc548 Pinout:
General Information:
- Type: NPN BJT
- Package: TO-92
- Usage: Amplification and switching
Features of BC548:
The BC548 is a popular NPN transistor with several key features:
- Type: NPN Bipolar Junction Transistor (BJT).
- Maximum Collector-Emitter Voltage (Vce): 30V.
- Maximum Collector Current (Ic): 100mA.
- Current Gain (hFE): 110 to 800, depending on the model and operating conditions.
- Maximum Power Dissipation: 500mW.
- Package Type: Typically comes in a TO-92 package.
- Frequency Response: Transition frequency (ft) of 250 MHz.
- Application: Used in low-power amplification, switching, and signal processing.
- Temperature Range: Typically operates between -55°C and +150°C.
- Easy to Use: Ideal for small-scale electronic circuits, hobby projects, and as a general-purpose amplifier.
Applications:
- Signal amplification in audio devices.
- Low-power switching circuits.
- Oscillators and timers.
- Current-controlled operation in microcontroller interfaces.
