NPN Silicon Epitaxial Planar Transistor for. Switching and Amplifier Applications. • RoHS compliance. Mechanical Data. Case: SOT, Plastic Package. The 2N is a common NPN bipolar junction transistor (BJT) used for general purpose depend on the manufacturer, case type, and variation. Therefore, it is important to refer to the datasheet for the exact part number and manufacturer. PNA. SMALL SIGNAL NPN TRANSISTOR. PRELIMINARY DATA s. SILICON EPITAXIAL PLANAR NPN. TRANSISTOR s. TO PACKAGE SUITABLE FOR.

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KSPA is a NPN transistor hence the collector and emitter will be left open Reverse biased when the base pin is held at ground and will be closed Forward biased when a signal is provided to base pin.

KSPA has a gain value of tothis value determines the amplification capacity of the transistor. The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume more than mA using this transistor. To bias a transistor we have to supply current to base pin, this current I B should be limited to 5mA.

When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region. But there are two important features that distinguish both.


KSPA can allow collector current upto mA and also has power dissipation of mW which can be used to drive larger loads than compared with BC So if you looking for an NPN transistor that could switch loads of higher current then KSPA might the right choice for your project.

Normally this type of transistor will either be used as a switch or as an amplifier, both of which is discussed below. One of the most default and primary function of a transistor is to act as a switch. It is very similar to a mechanical switch but here traneistor will control the switch using electric signals.

The vales of the Resistor in the above image are only for reference and are not accurate. The resistor R1 is called the Base resistor and is very important to dataeheet a trznsistor, it limits the base current and failing to use one might damage the transistor permanently.

The transistor will begin to 2222a when the voltage across the Base and Emitter pin exceeds 0. The resistor R2 is used to limit the current though the collector of the transistor and is not mandatory. Another Common application of a Transistor is as amplifiers. Every transistor has a gain h FE associated with it, which can be used to amplify voltage or current.

ST Microelectronics – datasheet pdf

There are many types of amplifier circuits that are possible with transistor but this is the most commonly used one trnsistor it is very good in amplifying low frequency voltage signals like audio signals. Again the values of the resistor mentioned above are only for reference commonly used you have to design your own circuit based on the application and transistor you are using.


In this type of circuit, the Emitter and the Base pin of the transistor should be commonly connected to a same 2222w, so we have connected it to the Ground potential using two resistors R4 and R3.

The base pin of the transistor has to be biased with a voltage; this voltage is provided by the potential divider network formed by the resistors R4 and R6. The capacitors C1 and C2 are simply used for filtering purpose.

ST Microelectronics

However this type of amplifiers have many drawback and if you are looking for some serious amplification applications then you should look into Op-Amps which are nothing but a package of many transistors put to gather with amplification as its sole purpose. Submitted by admin on 24 June Transistor as Amplifier Another Common application of a Transistor is as amplifiers. Applications General purpose NPN transistor Can be used to switch high current upto mA loads It can also be used in the various switching applications.

TL — Programmable Reference Voltage.