BC548 NPN General Purpose Transistor (5 Pcs)

The BC548 is a low-noise NPN Bipolar Junction Transistor (BJT) designed for general-purpose switching and signal amplification applications. It is widely used in audio circuits, sensor interfaces, relay drivers, LED switching, Arduino projects, amplifiers, and DIY electronics. With its compact TO-92 package and high current gain, the BC548 is a popular choice for low-power electronic circuits.

Features

• Full Name: BC548 NPN General Purpose Transistor
• General-purpose NPN transistor
• Low noise operation
• High DC current gain
• Fast switching performance
• Suitable for switching and amplification
• Compact TO-92 package
• Low power consumption
• Reliable and durable construction
• Easy to integrate into electronic circuits

Specifications

Pin Configuration

When viewed from the flat side with the leads pointing downward:

Note: Some manufacturers may use a different lead arrangement. Always verify the datasheet of your specific BC548 before use.

Applications / Uses

• Audio amplifier circuits
• Signal amplification
• Relay driver circuits
• LED switching
• Sensor interface circuits
• Arduino and ESP32 projects
• Oscillator circuits
• Logic switching
• Educational electronics
• DIY electronics projects

Advantages

• Low noise performance
• High current gain
• Fast switching speed
• Compact TO-92 package
• Low power consumption
• Reliable operation
• Low cost
• Widely available

Size

Package Includes

• 1 × BC548 NPN General Purpose Transistor (TO-92)

Note: The BC548 is intended for low-current applications with a maximum collector current of 100mA. It is commonly used in low-noise audio preamplifiers and signal amplification circuits. For higher-current applications such as motors or power relays, use a power transistor like BD139, D882, or a suitable MOSFET. Always use an appropriate base resistor when driving the transistor from a microcontroller or logic output.