How do you select an equivalent transistor?

As bias voltages and other features are different it is necessary to select a replacement transistor with the same material. Select the same functional type of transistor: Transistors are normally given an indication of their application in the datasheets. The replacement should have the same application if possible.

What type of transistor will work best?

Best Transistors: BJTs

• #1 NPN – 2N3904. You can find most often NPN Transistors in low-side switch circuits.
• #2 PNP – 2N3906. For high-side switch circuits, you need a PNP style BJT.
• #3 Power – TIP120.
• #4 N-Channel (Logic Level) – FQP30N06L.

What are the factors to consider in substituting transistor?

Depending on the application and type of the original transistor, the basic areas of concern are the voltage, power, current, switching speed and amplification characteristics of the substitute. Other areas that may also be important include the lead locations on the transistors and the mounting options.

What is the difference between 2N3904 and 2n2221 transistor?

It’s plastic but a very similar generic NPN small signal transistor. 2N3904 has more gain hfe than the 2N3903. They are very similar electrically to 2N2221 and 2N2222 which have metal can cases. Another 2N2222 transistor?

What is the common emitter configuration of transistor?

The Common Emitter Configuration. One such Common Emitter Amplifier configuration of an NPN transistor is called a Class A Amplifier. A “Class A Amplifier” operation is one where the transistors Base terminal is biased in such a way as to forward bias the Base-emitter junction.

What are the three types of transistor amplifiers?

The transistor is a three terminal device, thus the input and the output must share one terminal in common. This is the origin of the nomenclature of the three types of transistor ampli ers: common collector, common emitter, and common base.

How to identify the three leads of a TO-92 transistor?

However the current must be limited to 3 mA approximately. The three leads of a TO-92 transistor may be identified in the following manner: Keeping the printed side toward us, the right side lead is the emitter, the center one is the base and the left hand side leg is the collector of the device.