[SOLVED] Alternative for a transistor

[Mazen21]

Hello,
I want to know waht are the specification that I should look for to find an alternative for a a transistor?
thanks

 

[papunblg]

1. Match the current gain.
2. Match the maximum current

 

[godfreyl]

It depends what the transistor is used for. For a power transistor, you will care about maximum power and perhaps maximum voltages. If it is for switching, you may care about saturation characteristics or switching times. For a preamplifier, you may care about noise figures. For any high speed circuit, you may care about Ccb and Ft.

 

[papunblg]

see Choosing Transistor Replacements - summary of how to choose replacement transistors, ensuring the transistor replacements are able to operate satisfactorily within the circuit . here : https://www.electronics-radio.com/a...nsistor/choosing-replacements-transistors.php

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see Choosing Transistor Replacements - summary of how to choose replacement transistors, ensuring the transistor replacements are able to operate satisfactorily within the circuit . here : http://www.electronics-radio.com/articles/electronic_components/transistor/choosing-replacements-transistors.php

 

[Mazen21]

thank you that was helphul