BD139 NPN Transistor 80V/1.5A

The BD139 is an NPN transistor that is design for audio amplifiers and drivers utilizing complementary or quasi-complementary circuits. NPN Transistor BD139 is a medium power transistor with a collector current rating of 1.5A and a collector-emitter voltage rating of 80V. BD139 NPN Transistor has a low saturation voltage of 0.5V and a high current gain of up to 160.

The BD139 is a popular NPN transistor for a variety of audio applications, including amplifiers, drivers, and power supplies. BD139 NPN Transistor is also use in some switching applications.

The Transistor BD139 has a collector-emitter voltage rating of 80V. This means that the maximum voltage that can be applied between the collector and emitter terminals of the transistor is 80V. If the voltage between the collector and emitter exceeds 80V, the transistor will damage.

The maximum amount of current that could flow through the Collector pin is 1.5A, so do not connect loads that consume more than 1.5A using this transistor. The NPN Transistor BD139 can use to switch voltages up to 80V. 

The BD139 NPN transistor works on the principle of a bipolar junction transistor (BJT). A BJT is a semiconductor device that has three terminals: the base, the collector, and the emitter. The base is used to control the flow of current between the collector and the emitter.

The BD139 NPN transistor can use in a variety of circuits, including amplifiers, oscillators, and switches. In an amplifier circuit, the BD139 transistor is use to amplify a small signal voltage into a larger signal voltage and in an oscillator circuit, the BD139 transistor is use to generate a sine wave or square wave signal. In a switch circuit, the BD139 transistor is use to turn a load on or off.

Features : –

The BD139 transistor has a gain value of 40 to 160, which determines the amplification capacity of the transistor. This means that for every 1 amp of current that flows through the base, the collector current can be amplified by up to 160 amps.

The BD139 transistor is a popular transistor for a variety of applications due to its following benefits:

• High current gain
• Low saturation voltage
• Wide operating voltage range
• Small size
• Reliable and durable

BD139 NPN Transistor Transistor Specifications : –

The BD139 transistor is a medium power transistor with a collector current rating of 1.5A and a collector-emitter voltage rating of 80V. BD139 transistor has a low saturation voltage of 0.5V and a high current gain of up to 160. Here is a table of the key specifications of the BD139 transistor:

BD139 NPN Transistor Transistor Applications : –

The BD139 transistor is a versatile transistor that can use in a variety of applications. Here are some of the most common applications of the BD139 transistor:

• Audio amplifiers
• Power supplies
• Switching circuits
• LED drivers
• Computers
• Telecommunications
• Medical devices
• Industrial automation

BD139 NPN Transistor Transistor Pin Description : –

It is important to note that the BD139 transistor is a polarized transistor. This means that the base, collector, and emitter pins must connect in the correct order. If the pins connected in the wrong order, the transistor will not work properly and may damage. The BD139 transistor has three pins, as follows:

• Base: The base pin is use to control the flow of current through the transistor. A small current apply to the base can control a much larger current flowing through the collector.
• Collector: The collector pin is the output pin of the transistor. The current flowing through the collector is determine by the voltage apply to the base.
• Emitter: The emitter pin is the ground pin of the transistor. The current flowing through the emitter is the same as the current flowing through the collector.

Package : –

1 x BD139 Transistor

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