BD139 NPN Transistor In Pakistan

BD139 is a popular NPN transistor used in a wide variety of electronic circuits, due to its high collector current and low cost it is an ideal transistor to be used in educational electronic projects and also in commercial electronics. It can drive loads up to 1.5A which is a good feature due to which you can drive many high-current components such as high-power LEDs, high-current relays, motors etc. The collector-emitter and collector base voltage are also very high therefore it can easily survive in an electronic circuit that is operated under 80 volts. The collector dissipation is 12.5W which is also ideal to use in audio amplifier circuits. The saturation voltage of the transistor is just 0.5V.