BC372 NPN Transistor Pinout Datasheet

Introduction

The BC372 is a silicon NPN bipolar junction transistor (BJT) designed for low to medium power switching and signal amplification applications. It is widely used in audio amplifiers, driver circuits, and general-purpose low-frequency amplifiers due to its excellent linear gain characteristics and stable operation. The transistor delivers high performance in both analog and digital circuits, making it a versatile component for modern electronic designs.

This transistor is typically housed in a TO-92 plastic package, which provides a compact and thermally efficient form factor suitable for through-hole PCB mounting. With a maximum collector current of 800mA and a collector-emitter voltage of 45V, the BC372 can handle moderate load applications while maintaining high gain and low noise performance. It is commonly used in amplifier output stages, switching regulators, and signal conditioning modules where efficiency and signal integrity are essential.

BC372 NPN Transistor

The BC372 also features high DC current gain (hFE) and a transition frequency (fT) of several MHz, ensuring effective operation in both low- and mid-frequency applications. It is the NPN complementary counterpart of the BC373 PNP transistor, making them a matched pair ideal for push-pull amplifier configurations and audio driver stages. Because of its reliability, low distortion, and affordable cost, the BC372 is frequently used in both consumer electronics and industrial control systems.

BC372 Pinout

Pin Configuration

Key Features

• NPN silicon transistor for general-purpose amplification and switching
• Moderate current handling capability up to 800mA
• High DC current gain with good linear response
• Compact TO-92 package for easy installation and PCB compatibility
• Suitable for low-frequency and audio applications
• Reliable thermal stability and low noise operation
• Complementary to BC373 (PNP)

Characteristics

• Collector-Emitter Voltage (VCEO): 45V
• Collector-Base Voltage (VCBO): 50V
• Emitter-Base Voltage (VEBO): 5V
• Collector Current (IC): 800mA maximum
• Total Power Dissipation (Ptot): 625mW
• DC Current Gain (hFE): 40 to 250 (depending on test conditions)
• Transition Frequency (fT): 50MHz typical
• Junction Temperature (Tj max): 150°C
• Package Type: TO-92 (Plastic Encapsulation)

More Circuit Layouts

Key Applications of BC372 Transistor

• Low-frequency and audio signal amplifiers
• Driver and output stages of audio amplifiers
• Switching and control circuits
• General-purpose signal processing
• Low-power relay and LED drivers
• Small motor control and timing circuits

PNP Complementary Transistor

• The PNP complementary transistor for the BC372 is BC373.
  Together, these transistors form a matched NPN-PNP pair, ideal for push-pull amplifiers, signal inverters, and balanced driver circuits that require symmetrical performance.

Equivalent of BC372 NPN Transistor

• BC337
• BC547
• BC548
• BC639
• 2N2222
• 2N3904
• MPS2222A

Always verify the pin configuration and ratings before substitution.

Datasheet of BC372 NPN Transistor

Click the following Button to download the datasheet of BC672 Transistor :

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