BC548 NPN Transistor (30V 0.1A) is a general-purpose NPN bipolar junction transistor widely used in low-power switching and amplification applications. With a maximum collector-emitter voltage of 30V and a collector current of 100mA, this transistor is ideal for use in small-signal circuits, audio amplifiers, LED drivers, and low current switching devices.
The BC548 offers excellent gain performance with a DC current gain (hFE) typically ranging between 110 to 800, depending on the variant (A, B, or C). It comes in a TO-92 package, making it compact and suitable for breadboard prototyping and circuit integration.
It can be operated in three main configurations:
- Common Emitter – For voltage amplification
- Common Collector (Emitter Follower) – For current buffering
- Common Base – For signal amplification with low input impedance
This transistor is widely used by students, hobbyists, and engineers due to its availability, affordability, and versatility in electronic projects.
Key Features:
- Type: NPN Bipolar Junction Transistor
- Package: TO-92 (through-hole)
- Maximum Collector-Emitter Voltage (Vce): 30V
- Maximum Collector Current (Ic): 100mA
- DC Current Gain (hFE): 110–800
- Power Dissipation: 500mW
- Operating Temperature: -55°C to +150°C
- Suitable for switching & amplification applications
Applications:
- Signal amplification in low-power circuits
- Audio amplifier stages
- LED drivers and indicators
- Relay drivers for low-power control
- Switching loads up to 100mA
- Educational and DIY electronics projects
Package Type: TO-92
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