BC548 Transistor Datasheet, Pinout and Equivalent

Introduction

The BC548 transistor is a popular general-purpose NPN bipolar junction transistor used in a wide range of electronic applications. It is commonly used for amplification, switching, and signal processing. The emitter, base, and collector are the transistorhttps://azadtechhub.com/transistor-as-a-switch-a-comprehensive-overview/’s three terminals.

In electronic circuits, the BC548 transistor is commonly used as a switching device for controlling the flow of current or voltage. It can also be used as an amplifier to amplify signals or as a voltage regulator. Due to its versatility and low cost, the BC548 transistor is widely used in various electronic applications, such as audio amplifiers, oscillators, and signal generators.

The BC548 transistor is a reliable and widely used component in the field of electronics, thanks to its unique features and versatility. Whether you’re building a simple electronic project or a complex one, the BC548 is an essential component that you can’t afford to ignore. So, if you’re looking for a reliable and versatile transistor, look no further than the BC548 transistor. The BC548 is a general-purpose NPN bipolar junction transistor (BJT) commonly employ in electronic circuits for amplification, switching, and other applications.

BC548 Transistor Pins Configuration

BC548 Transistor Pins	Pin Name	Details
1	Collector	Current enters through the collector
2	Base	Biasing of Transistor is controlled by Base
3	Emitter	Current leaves transistor through emitter

Features of BC548 Transistor

Some of its features include:

• Maximum Collector-Emitter Voltage (Vce): 30V
• Maximum Collector-Base Voltage (Vcb): 30V
• Maximum Emitter-Base Voltage (Veb): 5V
• Collector Current (Ic) Maximum: 100mA
• DC Current Gain (hFE) Range: 110-800
• Power Dissipation (Pd): 500mW
• Transition Frequency (ft): 150MHz
• Operating Temperature Range: -55°C to 150°C
• Package Type: TO-92

Note that these are typical values and may vary depending on the manufacturer and specific model of the BC548 transistor.

Equivalent of BC548 Transistor

There are several alternatives for the BC548 transistor that have similar characteristics and can employ in its place in electronic circuits. Some of these alternatives include:

2N3904: This is a 40V NPN transistor with a maximum current rating of 200mA and a maximum voltage rating of 40V. It has a gain range of 100-300 and a transition frequency of 300MHz. The 2N3904 is a popular replacement for the BC548 in many applications.

BC547: This is another NPN transistor with a maximum voltage of 45V and a maximum current of 100mA. It has a gain range of 110-800 and a transition frequency of 300MHz. The BC547 is similar to the BC548 but has a slightly different pin configuration.

BC549: This is another another NPN transistor with a maximum voltage of 30V and a maximum current of 100mA. It has a gain range of 110-800 and a transition frequency of 150MHz. The BC549 is very similar to the BC548 but has a lower maximum voltage rating.

2N2222: This is another NPN transistor with a maximum voltage rating of 40V and a maximum current rating of 600mA. It has a gain range of 100-300 and a transition frequency of 300MHz. The 2N2222 is a popular replacement for the BC548 in high-current applications.

When selecting an alternative for the BC 548 transistors, it is important to ensure that the replacement transistors have similar or better characteristics to the original transistor. This will help to ensure that the circuit operates correctly and that the replacement transistor does not cause any damage to the circuit.

BC548 Transistor as a Switch

The BC 548 transistor can employ as a switch in electronic circuits to control the flow of current or voltage. When used as a switch, the transistor is either in an “on” state or an “off” state.

To use the BC548 transistor as a switch, it connects in a common-emitter configuration. In this configuration, the emitter connects to ground, the collector connects to the load, and the base is connected to the control signal.

When a positive voltage applies to the base of the transistor, it turns on and allows current to flow from the collector to the emitter, effectively turning on the load. When the voltage removes from the base, the transistor turns off and stops the flow of current through the load.

One advantage of using a transistor as a switch is that it can handle higher currents and voltages than a typical mechanical switch. Additionally, a transistor switch can be controlled electronically, allowing for more precise and flexible control of the load.

When using the BC548 transistor as a switch, it is important to ensure that the maximum ratings of the transistor are not exceeded. This includes the maximum voltage and current ratings, as well as the power dissipation rating. If the load requires a higher voltage or current than the BC548 transistors can handle, a different transistor or additional circuitry may be required.

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