BD140 Transistor

BD140 ??? in this paragraph, I’m going to discuss usage and features of BD140.
BD140 is a famous PNP type transistor.
It is used in many electronics circuits.
This transistor can handle current up to 1.5A or 1500mA, due to which it can be used to drive loads up to 1.5A in electronic circuits.
For example high power LEDs, relays, motors and more, with these features.
It has lots of other features like its high collector emitter and collector base voltage that is 80 volts, make it an ideal transistor to use in circuits using 80 volts DC or below 80 volts.
Moreover the collector dissipation of this transistor is around 12.5 watt due to which it’s a good transistor to use in audio amplifier circuits.
The minimum base voltage or saturation voltage of the transistor is -0.5V.

Features / technical specifications :

Package Type: TO-126
Transistor Type: PNP
Max Collector Current(I_ج): -1.5A
Maximum Collector-Emitter Voltage (V_CE): –80V
Max Collector-Base Voltage (V_CB): –80V
Maximum Emitter-Base Voltage (VEBO): –5 فولت
Transition Frequency (fT): 190 MHz
Max Collector Dissipation (Pc): 12.5 Watt
Minimum & Maximum DC Current Gain (h_FE): 25 – 250
Max Storage & Operating temperature Should Be: -55 to 150 Centigrade

BD140 Applications :

For instance, this is some applications for that transistor.

Audio Amplifiers
Switching Loads under 1.5A
شواحن البطاريات
Power Supplies
سائق دراجه ناريه
Darlington Pair

كيفية التشغيل بأمان لفترة طويلة في الدائرة:

To safely run this transistor in a circuit it is essential to not operate it above its absolute maximum ratings.
Do not operate this transistor from voltage higher than 80V DC.
Always use a suitable heatsink.
Use a suitable base resistor to provide required base current.
Do not operate or store it in temperature below -55 centigrade and above 150 centigrade.