BD139 NPN Bipolar Medium Power Transistor 80V 1.5A TO-126 Package (Pack Of 5)

Description

1. NPN Bipolar Transistor: The BD139 is an NPN type transistor, allowing current to flow from the collector to the emitter when a small current is applied to the base terminal. This configuration is widely used in amplification and switching applications.

2. Medium Power Rating: With a current rating of 1.5A and a voltage rating of 80V, the BD139 is suitable for medium-power applications. It can handle moderate currents and voltages, making it versatile for various electronic circuits.

3. TO-126 Package: The TO-126 package is a plastic encapsulated package with three leads (collector, base, and emitter). It offers good thermal performance and is easy to handle and mount on a circuit board.

4. Amplification and Switching: The BD139 is commonly used in audio amplification circuits, small signal amplifiers, and low-power switching applications. It is suitable for driving small loads such as relays, LEDs, and small motors.

5. Low Saturation Voltage: The BD139 exhibits a low saturation voltage, making it efficient for switching applications. It can switch on and off with minimal power loss.

6. General Purpose: It is a general-purpose transistor and finds applications in a wide range of electronic circuits where moderate power amplification or switching is required.

7. Complementary Pair: The BD139 is often used in conjunction with complementary PNP transistors (like BD140) in various electronic applications, including push-pull amplifiers and complementary symmetry amplifiers.