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BD139 TO-126 NPN Transistor
The BD139 NPN Transistor is a type of bipolar junction transistor (BJT) that is commonly used in a variety of electronic applications. It is a three-layer, NPN (negative-positive-negative) type of device that operates in the active mode, meaning that it requires a small base current to control a larger collector-emitter current. The TO-126 package of the BD139 transistor makes it a popular choice for applications where a larger power handling capability is required compared to the smaller TO-92 package. In terms of electrical characteristics, the BD139 has a maximum collector-emitter voltage of 80 volts and a maximum collector current of 1.5 amperes. It also has a gain (hFE) ranging from 40 to 160, making it well suited for use in a variety of power amplifier configurations. The BD139 can be used in applications such as switching, amplifying, and voltage regulation. It is commonly used in consumer electronics, automotive electronics, and industrial control systems. In conclusion, the BD139 NPN Transistor TO-126 is a versatile and cost-effective device that is widely used in many different applications. Its compact size, low cost, and good electrical characteristics make it a popular choice for designers and engineers looking to build a wide range of electronic systems that require a higher power handling capability.