BD245B Transistor

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bryan

Member

• Jul 11, 2011

• #1

Hello:

Have a project going, but it requires a BD245B transistor. Can not find one locally or at Digi-Key. Is there something equivalent that I can use. Attached is a pdf of the schematic.

Thanks in advance.

 

Attachments

• powersupply_upd4.pdf

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carbonzit

Active Member

• Jul 11, 2011

• #2

NTE matches it to their NTE390. Don't know if this is close enough for you, but it is available.

After looking at your circuit, judging by its position and function (pass transistor), I'd be surprised if you couldn't use a 2N3055 there.

 

Last edited: Jul 11, 2011

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colin55

Well-Known Member

• Jul 11, 2011

• #3

Use a BD679 in place of BD245 and BC137 if you only need 3 amps. BD679's are only 10 cents.

 

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bryan

Member

• Jul 11, 2011

• #4

Thanks folks,appreciate it. Found this site which lists equivelants.

https://alltransistors.com/transistor.php?transistor=24953

Colin55 just to be sure, you are suggesting the BD679 can replace both transistors BD245b and BC137 as the pair are actually acting as a Darlington transitor?

 

Last edited: Jul 11, 2011

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colin55

Well-Known Member

• Jul 11, 2011

• #5

BD 679 is NPN Darlington