KSP. A. NPN Epitaxial Silicon Transistor. Absolute Maximum Ratings Ta=25 °C unless otherwise . This datasheet contains the design specifications for. KSPA transistor is a general purpose transistor and hence fit into many applications, it is a direct substitute for 2NA transistor as both. KSPA Transistor Datasheet pdf, KSPA Equivalent. Parameters and Characteristics.

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The transistor will begin to conduct when the voltage across the Base and Emitter pin exceeds 0.

Normally this type of transistor will either be used as a switch or as an amplifier, both of which is discussed below. The vales of the Resistor in the above image are only for reference and are not accurate. There are many types of amplifier circuits that are possible with transistor but this is the most commonly used one because it is very good in amplifying low frequency voltage signals like audio signals.

KSPA Datasheet(PDF) – Fairchild Semiconductor

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


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

But there are two important features that distinguish both. Every transistor has a gain h FE associated with it, which can be used to amplify voltage or current. The resistor R1 is called the Base resistor and is very important to drive a transistor, it limits the kep current and failing to use one might damage the transistor permanently.

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. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region.

It is very similar to a mechanical switch but here we will control the switch using electric signals. One of the most datsheet and primary function of a dayasheet is to act as a switch. TL — Programmable Reference Voltage.

KSP2222A Datasheet

When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. Another Common application of a Transistor is as amplifiers.

KSPA has a gain value of tothis value determines the amplification capacity of the transistor. 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.


The resistor R2 is used to limit the current though the collector of the transistor and is not mandatory. To bias a transistor we have to supply current to base pin, this current I B should be dataheet to 5mA. The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume datasheer than mA using this transistor.

So datasheeet you looking for an NPN transistor that could switch loads of higher current then KSPA might the right choice for your project. Transistor as Amplifier Another Common application of a Transistor is as amplifiers.

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 Submitted by admin on 24 June Again the values of the resistor mentioned above are only dataasheet reference commonly used you have to design your own circuit based on the application and transistor you are using.