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TIP120 Series Transistors

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Revision as of 15:34, 1 June 2015 by DT Online (talk | contribs) (Added image)
TIP120.png

The TIP120 Series Collector is connected to the positive (+ve) supply via the load. NB If the load is inductive i.e. has coil windings such as a relay, solenoid or motor, then it is usual to connect a diode across it to prevent the Back EMF from damaging the transistor. (Cathode to supply). The input is connected to the Base via a limiting resistor (typically 1K). The Emitter is connected to the negative (-ve) supply (0V).


Uses: As current amplifiers, audio amplifiers and electronic switches, for example, Motor Drive Amplifiers, Relay Drive Amplifiers.


Data: The TIP 120 series transistors are Darlington Pairs i.e. they have 2 transistors in the one package, which gives them the advantage of higher power handling and gain.

  • Voltage between Collector and Emitter 6 - 60 Volts max.
  • Power handling capacity 60 Watts max.
  • Current handling capacity 5 Amps max.
  • Amplification (gain) greater than 1000.