TIP127 is a PNP BJT darlington transistor. It is a must of have transistor in an electronics lab because it can be used for variety of general purpose applications where you have need for high gain. The transistor can drive load of upto 5A, the collector-emitter voltage of the transistor is 100V due to which it can easily drive load of under 100V DC. Apart from that the maximum DC current gain of the transistor is 1000 and the max collector dissipation is 65W due to which it can also be used in audio and other signal amplification purpose.
This transistor has almost the same features or characteristics compare to the other two transistors of this series which are TIP125, TIP126. The only difference is the collector-base and collector-emitter voltage. But if you are using it in load under 60V then you can also use TIP125 and TIP126 as an accurate replacement for this transistor.
Where We Can Use it & How to Use:
TIP127 transistor can be used in wide variety of application. The pair of transistor connected in side as darlington increases the transistor gain and performance, whether it is used as a switch or amplifier in both situation the darlington pair provides more sensitivity to a small signal. If you want to use it as a switch then it can be operated in full saturation mode by providing only 120mA to its base. With 5A output current you can drive a verity of devices and components in your electronic applications. Beside the above uses it can also be used as a separate audio amplifier to amplify and drive a speaker directly for a small audio coming from any devices or it can also be used in audio amplifier stages. It can also be used as an audio preamplifier or amplification of any signal.
Audio Power Amplifier
Audio Amplifier Stages
Drive Loads under 5A
Can be used at the output of microcontroller
How to Safely Long Run in a Circuit:
To get long term performance with TIP127 it is recommended to not operate load of more than 5A through this transistor. Do not drive load of more than -100V through this transistor. Use a suitable base resistor with the transistor. Always check pinout before placing in the circuit. Do not store or use in temperature below -65 centigrade and above +150 centigrade.