2N3906 VS 2N2222 VS 2N3904: What are the Differences?

The 2N3906 is a PNP bipolar junction transistor that is extensively used in low-power amplifying and switching applications. It's made for modest electric current and power, as well as medium voltage and somewhat high speeds. 2N3906 is called MMBT3906 in SOT23 or SMD package. In other words, MMBT3906 is the SMD version of 2N3906.

The following are 2N3906 pinout and configurations.

The 2N2222 is a common NPN bipolar junction transistor (BJT) used for general-purpose low-power amplifying or switching applications. It is designed for low to medium current, low power, and medium voltage, and can operate at moderately high speeds. It was originally made in the TO-18 metal can. 

The following are 2N2222 pinout and configurations.

The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. It is designed for low current and power, medium voltage, and can operate at moderately high speeds.

The following are 2N3904 pinout and configurations.

Symbol

Footprint

3D

2N3906 Features

• Bi-Polar PNP Transistor

• DC Current Gain (hFE) is 300 maximum

• Continuous Collector current (IC) is 200mA

• Emitter Base Voltage (VBE) is 5V

• Base Current(IB) is 5mA maximum

• Collector-Emitter Voltage (VCE) is 40V

• Collector Base Voltage (VCB) is 40V

• Available in To-92 Package

2N2222 Features

• Package Type: TO-92

• Transistor Type: NPN

• Max Collector Current(IC): 600mA

• Max Collector-Emitter Voltage (VCE): 40V

• Max Collector-Base Voltage (VCB): 75V

• Max Emitter-Base Voltage (VEBO): 6V

• Max Collector Dissipation (Pc): 625 miliWatt

• Max Transition Frequency (fT): 300 MHz

• Minimum & Maximum DC Current Gain (hFE): 35 – 300

• Max Storage & Operating temperature Should Be: -55 -150 Centigrade

2N3904 Features

• Bi-Polar NPN Transistor

• DC Current Gain (hFE) is 300 maximum

• Continuous Collector current (IC) is 200mA

• Base- Emitter Voltage (VBE) is 6V

• Collector-Emitter Voltage (VCE) is 40V

• Collector-Base Voltage (VCB) is 60V

• Available in To-92 Package

2N3906 Applications

• Used to switch high voltage low current loads

• Optimal for loads with high peak voltage up to 40V

• It is used in various switching applications.

• Used in inverter and converter circuits

• Used for making siren or dual Led or Lamp flasher.

• Can be used in Darlington Pair.

2N2222 applications  

• Motor driver circuits

• Switching circuits

• Amplifier circuits

• Sensors circuits

• Audio preamplifier

• Low power application

• Inverter circuits

• RF circuits

• Darlington Pair

• Embedded and automation projects

2N3904 applications  

• Driver Modules like Relay Driver, LED driver, etc...

• Amplifier modules like Audio amplifiers, signal Amplifiers, etc...

• VCB and VBE are high hence can be used to control voltage loads up to 40V

• Commonly used in TV and other home appliances

2N3906 equivalent

Given below is the list of popular transistors which can be used as a replacement for 2N3906:

BC557, BC527, BC558, BC559, 2N2907, BC556, A1015, C945, 2N4403, 9014, MPSA13, MPSA92, MPSA55, and ZTX555

2N2222 equivalent

Given below is the list of transistors that are equivalent to 2N2222 and can be used as a replacement: BC148, KTN2222, 2N3904, 2N4403, MPS2222, S9014, KN2222, PN2222, BC637, BC547, and BC548

2N3904 equivalent

Given below is the list of popular transistors which can be used as a replacement for 2N3904:

BC537, BC538, 2N4401, and P2N2222A. BC547 and BC548 are functionally equivalent transistors.

2n3904 and 2n3906 Package Dimensions

2n2222 TO-18 Package Dimension

PNP Complementary of 2N2222 is 2N2907

NPN Complementary of 2N3906 is 2N3904