BC547 NPN Transistor Datasheet

Introduction

The BC547 is a very common and versatile silicon NPN bipolar junction transistor (BJT) widely used for general-purpose low-power amplification and switching. It’s a go-to component for electronics hobbyists and students because of its reliability, low cost, and wide availability. The BC547 can handle a collector-emitter voltage (VCEO​) of 45V and a continuous collector current (IC​) of 100mA, making it a great fit for a broad range of low-power to medium-voltage circuits.

A key feature of the BC547 is its high DC current gain (hFE​), which typically ranges from 110 to 800. This high gain allows a very small base current to control a much larger collector current, making it highly efficient for amplification. The transistor also has low noise capabilities, which is ideal for use in signal amplification stages. Its low typical saturation voltage of only 90mV also makes it an excellent and efficient electronic switch. With a power dissipation of 500mW and a high transition frequency of 300MHz, the BC547 is capable of handling high-speed switching and can be used in high-frequency applications.

BC547 NPN Transistor

The BC547 is housed in a compact and easy-to-use TO-92 package, which is the industry standard for small through-hole components. Its blend of performance, affordability, and accessibility has cemented its status as a fundamental building block in the electronics world.

BC547 Pinout

BC547 NPN Transistor Key Features

The BC547 is a very common and versatile silicon NPN bipolar junction transistor (BJT) used for general-purpose low-power amplification and switching. It is a popular choice among students and hobbyists due to its reliability, low cost, and wide availability.

• Medium Voltage Rating: It has a collector-emitter voltage (VCEO​) of 45V, making it suitable for a broad range of low to medium-voltage circuits.
• Low Current Capability: The transistor can handle a continuous collector current (IC​) of up to 100mA, which is ideal for controlling small loads like LEDs, small relays, and signal processing circuits.
• High DC Current Gain (hFE​): The BC547 boasts a high DC current gain, which typically ranges from 110 to 800. This allows a very small base current to control a much larger collector current, making it highly efficient for amplification tasks.
• Good Power Dissipation: With a total power dissipation (PD​) of 500mW, it can manage a good amount of power for its size without overheating.
• High Transition Frequency: It has a transition frequency (fT​) of 300MHz, which allows for high-speed switching and use in high-frequency applications.
• Compact Package: The BC547 is commonly available in a TO-92 package, which is a small, plastic through-hole package that is easy to use on breadboards and PCBs.

BC547 Transistor Specifications/Characteristics

More Circuit Layouts

Key Applications of BC547 NPN Transistor

• Sensor Circuits
• Audio Preamp circuits
• Audio Amplifier Stages
• Switching Loads under 100mA
• Transistor Darlington Pairs
• Radio Frequency Circuits

PNP Complimentary Transistor

PNP Complementary of BC547 Transistor is BC557.

Equivalent Transistors of BC547

2N2222, 2N3904, 2N4401, BC337 
(Pin configuration of some transistors are different from BC547).

Datasheet of BC547 NPN Transistor

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