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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ST Microelectronics

Graf and William Sheets I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA: It was originally made in the TO metal can as shown in the picture. The BC is transisotr low voltage, low current, general-purpose switching transistor in a TO package. Commercial transistors Bipolar transistors. Junkbots, bugbots, and bots on wheels: KSPA datashest 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.

The Base-Emitter voltage of this transistor is 6V so you just have to supply this voltage across the base and emitter of the transistor to induce a base current into the tranwistor.

No other pin will show that. Spehro Pefhany k 4 To make things simple I have shown a simplified circuit to make a transistor as switch. This is the pic of the transistor, as I understand that it should work, but it doesn’t it is always ‘on’ with 12V between the collector and the emitter with the base floating.

To bias a transistor we have to supply current to base pin, this current I B should be limited to 5mA. Retrieved 26 March In actual circuit modifications might be required.


Single transistors are also available in several different surface mount packages, and a number of manufacturers market surface mount packages that incorporate several 2Ntype transistors in one package as an array of transistors.

If I set up the circuit for a quick test, it seems that the datasheet or the transistor has the pins swapped. The 2N, 2N, and 2N devices, for example, datasjeet date back to the s but have been improved, are still useful in new designs and are still trnsistor for experimenters. 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 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.

2NA Pinout, Features, Equivalent & Datasheet

I have used a base voltage of 5V and a value of 1K as current transiator resistor. This page was last edited on 25 Octoberat The 2N is an NPN transistor that can only switch one-third the current of the 2N but has otherwise similar characteristics.

So if you looking for an NPN transistor that could switch loads of higher current then KSPA might the right choice for your project. How to use 2NA This transistor like all can be used either as a switch or as an amplifier.

It can be even worse, since the On Semi PN has the conventional pinout, despite being the same manufacturer and mostly same specifications: It is used in a variety of analog amplification and switching applications. Home Questions Tags Users Unanswered.

ST Microelectronics – datasheet pdf

Retrieved from ” https: The situation worsen when all these china fake transistors crowded the whole market, there are no standardization at all. The 2N is considered a very common transistor, [1] [2] [3] and is used as an exemplar of an NPN transistor.


As the name suggests this resistor will limit the current flowing through the transistor to prevent it from damaging. Every transistor has a gain h FE associated with it, which can be used to amplify voltage or current. I don’t think so – throw it in the bin. The general specifications of the various variants are similar, with the biggest difference being the maximum 22222a current and power dissipation.

Submitted by admin on 24 June From Wikipedia, the free encyclopedia.

PN2222A Datasheet, Equivalent, Cross Reference Search

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The base pin of the transistor has to be biased with a voltage; transisotr voltage is provided by the potential divider network formed by the resistors R4 and R6.

Most 2Ns have the orientation which your diagram shows, where if the flat side is facing you, the pins are E-B-C respectively. 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. When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter.

Note that the motor here draws about mA from the 12V power source, since the 2N has collector current rating upto mA this circuit is possible had it been a BC the transistor should have been burnt. Absolute maximum rating for emitter-base voltage is 6V hence the E-B junction broke down and started conducting.