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The input and output capacitance of 2N222 is slightly higher than BC547. Are there any differences between 2N2222 and BC547 Transistor?īetween BC547 & 2N2222, there are minor changes in output and input capacitance. Although using an equivalent transistor requires a detailed comparison, the BC547 is still a good alternative to 2N2222. BC547 transistor is considered the best equivalent of 2N2222 & can work well in your projects. Given below is the list of transistors that are equivalent to 2N2222 and can be used as a replacement. Which transistors are equivalent to 2N2222? Therefore, it is important to refer to the datasheet for the exact part number and manufacturer. The exact specifications depend on the manufacturer, case type, and variation. The technical specifications of 2N2222 in TO-18 metal packaging and 2N2222A transistor in TO-92 packaging are given below: Spec 2N2222A 2N2222 Power Dissipation(T C = 25☌) 1.5 1.2W DC Current Gain (hFE) 30-300 30-300 Operating Temperature Range -55 to 150☌ -65 to 200☌ Continuous Collector Current (I C) 0.6 A 0.8 mA Collector-Base Voltage(V CB) 75 60V Emitter-Base Voltage(V EB) 6 5V Collector-Emitter Voltage(V CE) 40 30V Input Capacitance(C I) 25pF 30pF Output Capacitance(C O) 8pF 8pF Transistor type NPN NPN Package TO-92 TO-18 Mounting Type Through-hole Through-hole Transition frequency(Ft) 250MHz This table shows the technical specifications of the 2N2222 Transistor The Collector to Base, Emitter to Base, and Collector to Emitter voltage ratings of 2N2222 and 2N2222A are 60V, 30V, 5V and 75V, 40V, 6V respectively.Īlso, the 2N2222 comes in metal packaging whereas the 2N2222A is available in TO-92 plastic enclosure only.ĢN2222A is a better option considering its higher ratings, low cost, and TO-92 packaging.

Pin descriptionĢN2222 VS 2N2222A: What’s the difference?īoth are similar types of transistors but the 2N2222A has higher Maximum absolute ratings than 2N2222.

This pin act as an outlet and the current comes out of the transistor from here. 2 Base This pin controls the transistor biasing.

using just a few parts and start integrating more, I want to be mindful of the current draw on my stamp.Original 2N2222 Pinout(TO-18 Package) Pin Type Function 1 Emitter This pin act as an inlet as the current enters the transistor from here.

As I move foreword and away from simple projects Could someone help me figure out how much current I am sourcing from my stamp. Anyways I have attached the datasheet for the part to this post. I am using what I believe to be quality transistors, ST 2N2222A, I say this in reference to erco mentioning the lower quality ones the shack sells. I have one followup question to this excersize.

I fired up the stamp, made pin 15 high and it worked!.

and changing the the negative terminal on the motor.

Below is an updated schematic, the changes are the addition of the diode, resistor value change, a lower voltage motor, I got a lower voltage motor, 3V, and put in a 500ohm resistor, I forgot to get some 470's at the shack and the 500's were all I had. Mike, following your advice, I put a 1N4001 diode in place. Erco, using that relay will be my next learning excersize.

I got a multi pack of rectifier diodes, a lower voltage motor, and picked up one of the reed relays erco mentioned. Well I swung by the shack today and picked up some parts.