The BD139 is silicon Epitaxial Planar NPN transistors mounted in Jedec SOT-32 plastic package, designed for audio amplifiers and drivers utilizing complementary or quasi-complementary circuits
Power Transistor?
Transistors are three-terminal semiconductor electronic devices that can be used as switches or amplifiers.
They can be of NPN or PNP polarity, and many different types are available with different power and switching speed ratings. If a transistor designed to these concepts can handle more than 1 A of collector current, it is generally considered to be a power transistor. Such transistors must have low output resistance to deliver large load currents, and good junction insulation to resist high voltages. They must also dissipate heat very quickly to avoid overheating.
BD139 Pinout
BD139 Pin Configuration
| Pin No | Pin Name |
|---|---|
| 1 | Emitter |
| 2 | Collector |
| 3 | Base |
BD139 Key Features
- High current (max. 1.5 A)
- Low voltage (max. 80 V)
- Type Designator: BD139
- Material of Transistor: Si
- Polarity: NPN
- DC Current Gain — hFE = 40 (Min) @ IC = 0.15
- Maximum Emitter-Base Voltage |Veb|: 5 V
- Package: TO126
BD139 Specification
| Ic (mA) | Pd (mW) | Vce (max) | Vcb | hfe | @Ic | FT |
|---|---|---|---|---|---|---|
| 1.5 | 8 | 80 | 100 | 63-250 | 150 | 190 |
BD139 Equivalent/Alternate:
- BD115, BD130, BD131, BD132, BD135, BD140
Application
- Audio Amplifier
- Hi-Fi Amplifiers
- Television Circuits
- General Purpose
You can download this datasheet for BD139 NPN Power Transistor from the link given below:
