![]() ![]() Although care has to be taken to check if the logic device can source upto 120mA. This transistor has a low Base-Emitter Voltage of only 5V hence can be easily controlled by a Logic device like microcontrollers. TIP120 transistor is known for its high current gain (hfe = 1000) and high collector current (IC =5A) hence it is normally used to control loads with high current or in applications where high amplification is required. This increases the current gain and current rating of this transistor. The Darlington pair inside this transistor is shown clearly as its internal circuit schematic belowĪs you can see, there are two transistors inside this TO-220 package in which the emitter of first transistor is connected with the base of second transistor and the collector of both transistors are connected together to form a Darlington pair. If you need more voltage then you can check other transistor in the same family lit the TIP122. It can also withstand about 60V across its collector- Emitter hence can be used to drive heavy loads. It functions like a normal NPN transistor, but since it has a Darlington pair inside it has good collector current rating of about 5A and a gain of about 1000. The TIP122 is a Darlington pair NPN transistor. ![]() Note: Complete Technical Details can be found at the TIP120 datasheet given at the end of this page. Continuous Collector current (IC) is 5A.High DC Current Gain (hFE), typically 1000.Pin Configuration Pin NumberĬontrols the biasing of transistor, Used to turn ON or OFF the transistorĬurrent flows in through collector, normally connected to loadĬurrent Drains out through emitter, normally connected to ground This makes it suitable for medium and high power electronics like controlling motors, solenoids or high power LEDs. ![]() It can switch loads upto 60V with a peak current of 8A and continuous current of 5A. The TIP120 is a NPN Darlington Power Transistor. ![]()
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