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reading transistor datasheet(hfe)

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jayanthyk192

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Hi,
I buiding simple transistor switch circuits using 2n2222. I looked at the datasheet for the value of hfe.the datasheet gives many values of hfe. how do I know which value to take for my calculation. the values range from 35 to 300. please help me with this.

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IanP

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To insure a circuit will always work properly, it is safe to use a value of 35 ...

:wink:
IanP
 

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