2n2222

2n2222 transistor pinout

Pin Number	Pin Name	Description
1	Emitter	Current flows out through emitter
2	Base	Controls the biasing of the Transistor
3	Collector	Current flows in through collector

2n2222 package

• For this 2n2222 transistor, TO-18 metal can package
• The TO-18 transistor package had a higher temperature withstanding capacity.

2n2222 specification

• NPN BJT Transistor
• DC Current Gain range is 30 to 300 h_FE
• Collector current (I_C) is 800mA
• Emitter to Base Voltage (V_BE) is 5V
• Collector to Emitter Voltage (V_CE) is 30V
• Collector to Base voltage (V_CB) is 60V
• Base Current (I_B) is 200mA maximum
• Transition frequency (F_T) is 250MHz

2n2222 Description

• The 2n2222 transistor is a bipolar NPN transistor, the maximum current gain for the 2n2222 transistor is 300h_FE and the current gain value will decide the amplification factor for the transistor.
• The maximum collector current at the 2n2222 transistor is 800mA, this particular current value is the maximum current at this device.
• The maximum bias current on the 2n2222 transistor is 200mA, the maximum allowable bias voltage on the trigger terminal.
• The transition frequency of the 2n2222 transistor is 250MHZ, it is the maximum frequency on this frequency.

Datasheet of 2n2222 transistor

If you need the datasheet in pdf please click this link

2n2222 Equivalent

• The 2n2222 equivalent transistors are 2n3904, BC547, BC548, and 2n3906
• Each of the 2n2222 equivalent transistors listed here is NPN bipolar and most of them are identical transistors.

2n2222 vs BC547 vs 2n3904 vs 2n2222A

	2n2222	BC547	2n3904	2n2222A
Collector to base voltage (VCB)	2n222260v	BC54750v	2n390460v	2n2222A75v
Collector to emitter voltage (VCE)	2n222230	BC54735	2n390440	2n2222A40
Emitter to base voltage (VEB)	2n22225v	BC5476v	2n39046v	2n2222A6v
Collector current (IC)	2n2222800mA	BC547100mA	2n3904200mA	2n2222A800mA
Power dissipation	2n2222500mw	BC547500mw	2n3904625mw	2n2222A500mw
Junction temperature (TJ)	2n2222200°C	BC547150°C	2n3904150°C	2n2222A200°C
Transition frequency (FT)	2n2222250MHZ	BC547300MHZ	2n3904300MHZ	2n2222A300MHZ
Noise (N)	2n22224db	BC5475db	2n390410db	2n2222A4db
Gain (hFE)	2n222230 – 300 hFE	BC547110 – 800 hFE	2n390430 – 300 hFE	2n2222A35 – 300 hFE
Package	2n2222TO-18	BC547TO-92	2n3904TO-92	2n2222ATO-92 TO18 TO39

2n2222 Application

• It is the most popular general-purpose transistor type used in electronics.
• Low power applications
• Preamp
• Motor Driver circuits
• Inverter circuits
• Amplifier circuits
• Switching circuits
• Sensor circuits

2n2222 transistor as a switch

• The circuit shows the 2n2222 transistor as a switch, as we can see an input resistor used to drive the transistor and another resistor to drive the LED.
• As when the switch closes, the transistor starts work, and the LED ON and OFF interval control by the resistor value.

2n2222 transistor as an amplifier

• The figure shows the amplifier circuit using a 2n2222 transistor.
• The common emitter is the configuration of the transistor, it is the best voltage amplifier circuit using NPN 2n2222 transistor
• This particular had a higher gain, due to the transistor configuration.