BC547 NPN Transistor 45V 800MA – 100Pcs

Features and Specifications of the BC547 NPN Transistor

The BC547 NPN transistor is a widely used generic transistor in various electronic circuits, known for its excellent performance attributes. One of its notable features is the transistor’s structure, which consists of three semiconductor layers: the emitter, base, and collector. This arrangement allows the BC547 to function efficiently as a signal amplifier or a switch in applications ranging from audio equipment to digital devices.

In terms of operating characteristics, the BC547 boasts a maximum collector current (IC) of 100 mA and a collector-emitter voltage (VCE) of 45 V. These ratings indicate the transistor’s capability to handle moderate signal levels, making it suitable for a variety of low-power applications. The DC current gain, denoted as hFE, typically ranges from 110 to 800, highlighting the transistor’s effectiveness in signal amplification.

The frequency response of the BC547 is another critical aspect, as it can operate effectively at frequencies up to 300 MHz. This high frequency range allows the transistor to be utilized in RF applications and in circuits that require fast switching speeds. It is essential to consider these specifications when designing circuits, as they directly influence the performance and reliability of the application.

When comparing the BC547 to similar transistors, such as the BC548 and the 2N3904, one can note that while these alternatives may offer similar voltage and current ratings, the BC547 differentiates itself with superior gain and frequency response characteristics. Consequently, the BC547’s unique combination of features makes it a favored choice for engineers aiming for efficiency and reliability in their electronic designs.

Applications of the BC547 NPN Transistor

The BC547 NPN transistor is widely used in various applications, both in hobbyist projects and professional electronic designs. One of its primary roles is in signal amplification, where it is employed in audio and radio frequency applications. The BC547’s ability to amplify weak signals makes it an excellent choice for designing audio amplifiers, operational amplifiers, and other circuits that require enhanced signal strength.

In addition to amplification, the BC547 is often utilized in switching circuits. Its capability to control a larger current or voltage with a smaller input signal allows it to function effectively as an electronic switch. This characteristic is particularly useful in digital logic circuits, where the BC547 can be used to perform on-off operations, creating binary states essential for logic operations. For instance, it can be found in microcontroller projects, where it interfaces with various sensors and actuators.

Moreover, the BC547 is integral in oscillator circuits, which generate periodic waveforms necessary for numerous applications, including clock signals in digital circuits. Its versatility allows for various oscillator configurations, making it a valuable component in timing applications.

In practical circuit designs, the BC547 can be seen in LED drivers, where it controls the current flowing through the LED, ensuring optimal brightness without damaging the component. Other examples include its use in small-signal RF amplifiers, where it helps in boosting radio frequencies for better transmission quality.

Utilizing the BC547 in electronic projects provides several advantages, including its cost-effectiveness and availability. Its compact size and robust performance make it ideal for environments with limited space and resources. As a result, the BC547 transistor stands as a fundamental component for engineers and hobbyists alike, offering reliable solutions across a wide range of electronic applications.

Technical Data

• Transistor type: NPN
• Collector-Emitter Voltage (Vce): 45 V max
• Collector Current (Ic): 100 mA max
• Current Gain (hFE): 110 to 800 (depending on the model)
• Power Dissipation (Pd): 500 mW
• Base-Emitter Voltage (Vbe): 6 V max
• Operating Temperature: -55°C to +150°C
• Package: TO-92