BD139 Transistor Pinout, Features, AlternateBD139 transistor is a popular NPN type used in variety of electronic circuits. It is an ideal transistor due to its high collector current and low cost. Due to these features it is used in educational electronics projects as well as in commercial electronics circuit. This transistor can load upto1.5A so you can drive high current components like high current relays, motors, LEDs etc. It can easily survive in almost all electronics circuits because 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 dissipation. The saturation voltages of BD139 are just0.5V. Pin Configurations of BD139
Features / technical specifications of BD139
BD139 Equivalent NPN TransistorsBD136, BD138,BD230, 2SC5171S, BD349, and BD379 Perfect Alternative to BD139 TransistorD882 is perfect alternate of BC139 PNP Complementary of BD139 TransistorComplementary of BD139 is BD140 Applications
Where to use BD139 TransistorThis transistor firstly manufactured by Philips rated at 160MHz specially for audio applications, later it was cloned by other manufacturers like ST, Samsung etc. Due to high collector current of 1.5A this transistor can be used to control (On/Off) high loads that consume less than 1.5A. The saturation voltages (Base Emitter Voltage VBE) of only 5V, this makes it easy to use in digital electronics which has an operating voltage of 5V. It comes in plastic jacket that is way its cost is very less and the most important feature of plastic jacket is that it will not be effect by other noise. Datasheet of BD139The datasheet of this transistor is given in this link. Other NPN Transistors |