What is BD139?

What is BD139?

BD139 is a Bipolar NPN transistor, it is mounted in the SOT-32 plastic package. It is designed for audio amplifier and driver utilizing complementary circuits. BD139 has a gain value of 40 to 160, which determine the amplification capacity of a transistor.

Can I use BD140 instead of BD139?

Though the best choice for power transistors is BD139 and BD140 but if they are not available then you may also go for BD135 and BD136 which are NPN and PNP transistors respectively but preference must be given to BD139/140 pair.

What is BD140 transistor?

BD140 is a medium power bipolar junction transistor that is mainly used for switching and amplification purpose. It belongs to the PNP transistor category and comes in the TO-126 package. It is made up of silicon material with collector current 1.5A which indicates it can support loads under 1.5A.

What is the use of 2N2222 transistor?

The 2N2222 is a common NPN bipolar junction transistor (BJT) used for general purpose low-power amplifying or switching applications. It is designed for low to medium current, low power, medium voltage, and can operate at moderately high speeds. It was originally made in the TO-18 metal can as shown in the picture.

What is TIP122 transistor?

The TIP122 is a Darlington pair NPN transistor. It functions like a normal NPN transistor, but since it has a Darlington pair inside it has a good collector current rating of about 5A and a gain of about 1000. It can also withstand about 100V across its collector- Emitter hence can be used to drive heavy loads.

Is the BD139 an NPN or PNP transistor?

These epitaxial planar transistors are mounted in the SOT-32 plastic package. They are designed for audio amplifiers and drivers utilizing complementary or quasi-complementary circuits. The NPN types are the BD135 and BD139, and the complementary PNP types are the BD136 and BD140.

How much current can a 2N2222 transistor handle?

It’s a current controlled transistor. It has a Collector current of 800 mA. Power Dissipation of 2N2222 is 500mW. It can operate between -65 C to 200 C temperature.

Is PN2222 the same as 2N2222?

PN2222 vs 2N2222 2N2222 is the most common NPN bipolar junction transistor available in the market. Same as PN2222, it can be used for amplification of analog signals as well as switching applications. For most purposes, they are interchangeable.

Are NPN and PNP transistors interchangeable?

Answer: NPN and PNP transistors are interchangeable if you remember one simple rule: A bipolar transistor is essentially two back-to-back diodes with the base being the common connection. On the left is an NPN (negative-positive-negative) transistor and on the right is a PNP (positive-negative-positive) transistor.

What is a TIP120?

The TIP 120 is a NPN darlington transistor with a current gain of 1000 that is a good choice for interfacing many higher current or higher voltage loads to an Arduino or other microcontroller. It can be used to control DC motors, solenoids or strings of LEDs with minimal current draw from the microcontroller.

What are the specifications of a bd139 transistor?

Technical Specifications of BD139 Transistors are: 1) Transistor Type: NPN 2) Max Collector Current (IC): 1.5A 3) Max Collector-Emitter Voltage (VCE): 80V

What does LED1 mean in a bd139 circuit?

BD139 is acting a switch and oscillates high-frequency signal with the help of R1, C1, and C2 resonator. In this circuit, LED1 indicates the presence of bias to this circuit. For practical understanding let’s see circuit diagram.

How does a bd139 work as a switch?

BD139 working as a Switch 1 In given diagram circuit is designed to produce high magnetic flux. Center tapped coil is maid by 20 SWG Enameled copper… 2 BD139 is acting a switch and oscillates high-frequency signal with the help of R1, C1, and C2 resonator. 3 In this circuit, LED1 indicates the presence of bias to this circuit. More

What is the current gain of a bd139?