Difference Between BC547 Transistor vs. 2N2222 Transistor [Video&FAQ]

The BC547 Pinout is shown as follows.

BC547 Pinout

The BC547 transistor is a general-purpose bipolar NPN transistor with a gain range of 110 to 800Hfe, which determines the amplification capability of the transistor device.

The transistor BC547's maximum collector current, or maximum allowed current, is 800Ma.

Furthermore, the maximum bias current to the BC547 transistor is 5mA.

The BC547 transistor's transition frequency is 30 MHZ, which is crucial when the transistor is performing switching activities.

The following figure is the Pinout of 2N2222.

2N2222 Pinout

The 2N2222 transistor is a bipolar NPN transistor. The maximum current gain for the 2N2222 transistor is 300hFE and the current gain value will define the amplification factor for the transistor.

The maximum collector current at the 2N2222  transistor is 800mA, this particular current number is the maximum current at this device.

The maximum permitted bias voltage on the trigger terminal is 200mV, and the maximum bias current on the 2N2222 transistor is 200mA.

The maximum frequency on this frequency is 250MHZ, which is the transition frequency of the 2N2222  transistor. 

BC547 Features

• NPN BJT Transistor

• DC Current Gain range is 110 to 800 hFE

• Collector current (IC) is 100mA

• Emitter to Base Voltage (VBE) is 6V

• Collector to Emitter Voltage (VCE) is 45V

• Collector to Base voltage ( VCB ) is 50V

• Base Current ( IB ) is 5mA maximum

• Available in TO-92 Package

2N2222 Features

• NPN BJT Transistor

• DC Current Gain range is 30 to 300 hFE

• Collector current (IC) is 800mA

• Emitter to Base Voltage (VBE) is 5V

• Collector to Emitter Voltage (VCE) is 30V

• Collector to Base voltage (VCB) is 60V

• Base Current (IB) is 200mA maximum

• Transition frequency (FT) is 250MHz

BC547 Applications

• Amplifier Circuits

• Preamp Circuits

• Driver Circuits

• Switching Circuits

• PMW Circuits

• Alarm Circuits

• Water Level Indicator Circuits

• Sensor Circuits

• Touch Switch Circuits

• Volume Level Changing Circuits

2N2222 Applications

• Low Power Applications

• Preamp

• Motor Driver Circuits

• Inverter Circuits

• Amplifier Circuits

• Switching Circuits

• Sensor Circuits

BC547 Equivalents

The BC series, such as BC549 and BC639, are the finest recommendations for the BC547 transistor equivalent, followed by the 2N2222 transistor.

BC636 replaces BC547, 2N2369, 2N3055, 2N3904, 2N3906, and 2SC5200 in the PNP.

2N2222 Equivalents

2N3904, BC547, BC548, and 2N3906 are 2N2222 comparable transistors.

Each of the 2N2222 equivalent transistors described here is an NPN bipolar transistor, with the majority of them being identical.

The two transistors' packages are shown as follows.

BC547 Package

2N2222 Package

For this 2N2222 transistor, TO-18 metal can package.

The TO-18 transistor package had a higher temperature withstanding capacity.

The 2N2222 is a more powerful transistor than the BC547. The 2N transistors came in a to-18 package, which implies they were packaged in a metal container.

The BC547 transistor had a to-92 package, but 2N2222 had to-92 packages as well, such as PN2222 and KN2222.

On the 2N2222, the pinout is emitter, base, and collector, whereas, on the BC547, it is collector, base, and emitter.

The collector to the base voltage at 2N2222 is 60v, while it is 50v at bc547, while the collector to emitter voltage at 2N2222 is 30v, while it is 45v at BC547. The emitter to base voltage at 2N2222 is 5v, while it is 6v at BC547. 

The 2N2222's maximum collector current is 800mA, while the bc547's is 100mA.

The power dissipation of both the 2N2222 and the BC547 is the same (500mw), the DC gain of the 2N2222 is 75 to 300HFe and the DC gain of the BC547 is 110 to 800HFe, and the thermal resistance of the 2N2222 is 146k/w and the thermal resistance of the BC547 is 83.3 C/w.

The noise figure on 2N2222 is 4db and on BC547 is 10db because the transition frequency of 2N2222 is 250MHz and that of BC547 is 300MHz.

BC547 Datasheet

2N2222 Datasheet