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BD139 transistor is a non-technicalTRANSISTOR NPN Kind use in variation of electronic circuits. It is an perfect transistor due to its high collector current and low cost. Due to thesequality it is used in academic electronics stand out as well as in Trade electronics circuit. This transistor can load upto1.5A so you can oprate high current Part like high current relays, motors, LEDs etc. It can simply hold on in nearly all electronics circuits since collector emitter and collector base voltage is very high upto 80 volts. It is also ideal to use in amplifier circuits due to 12.5W collector excess. The overload voltages of BD139 are just0.5V.

NO Pin Name
1EmitterCurrent Drains down emitter
2CollectorCurrent move in throughout collector
3BaseControls the skew of transistor, Use to turn ON & OFF
  • Plastic casing: NPN Transistor
  • obtainable Bundle: TO-126
  • Continuous Collector current(IC): 1.5A
  • Collector-Emitter voltage (VCE): 80V
  • Collector-Base voltage (VCB): 80V
  • Emitter Base collapse Voltage(VEBO): 5V
  • Collector Dissipation (Pc): 5 Watt
  • Max Transition rate of repetition (fT): 190 MHz
  • DC Current Gain (hFE): 25 – 250
  • Maximum Storage & oprate temperature-55 to +150 Centigrade  

  BD 139  Equal NPN Transistors
BD136, BD138,BD230, 2SC5171S, BD349, and BD379

PNP Harmonize of BD139 Transistor

Complementary of BD139 is BD140

  • Switching circuits
  • RF Amplifiers circuit
  • Audio amplifiers applications
  • Amplification circuits
  • Load operator circuits

Situation to use BD139 Transistor

This transistor firstly manufactured by Philips rated at 160MHz specially for audio Situation, later it was cloned by other Maker like ST, Samsung etc.
Proper to  high collector current of 1.5A this transistor TRANSISTOR can  use to control (On/Off) high loads that devour less than 1.5A.  The overload voltages (Base Emitter Voltage VBE) of only 5V, this drive it simply to used in digital electronics which has an oprated voltage of 5V. Its come in plastic jacket that is way its cost is very less and the most major feature of plastic jacket is that it will not be result  by other noise.

Other NPN Transistors

bc546. bc548. bc 549. 2n2222a. c945. c1815.

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