EEVblog Electronics Community Forum

Electronics => Projects, Designs, and Technical Stuff => Topic started by: IconicPCB on April 09, 2019, 10:32:41 pm

Title: Replacement for TIP36 transistor
Post by: IconicPCB on April 09, 2019, 10:32:41 pm

The replacement issue is not too difficult to resolve however I am looking for a TIP36 like transistor with a lower beta than tip36.

In fact I am presently using  TIP36 however I am looking for similarly specced transistor with a beta of 15 to 20 at collector current of 10 amps.

BD250 seems like a suitable candidate unfortunately it is obsolete.

EDIT: obsolete according to some suppliers , element14 claims 600 odd pieces world wide.
Element14 offers a Multicomp device which is different to some older sources... back to square one.

Title: Re: Replacement for TIP36 transistor
Post by: Cliff Matthews on April 10, 2019, 12:48:21 am

Alltransistors.com is helpful. Search on TIP36, > 'find substitute', > search again results (after changing parameters desired).
Here is similar devices (https://alltransistors.com/crsearch.php?mat=Si&struct=PNP&pc=90&ucb=80&uce=40&ueb=5&ic=25&tj=150&ft=3&cc=0&hfe=20&caps=&r1=0&r2=0&r1r2=0), (without limiting results to a TO218 case) scroll down - there's a big list. - Hope that helps!

Title: Re: Replacement for TIP36 transistor
Post by: radix on April 10, 2019, 06:52:01 pm

Why wouldn't you just put a resistor across the BE junction?

Title: Re: Replacement for TIP36 transistor
Post by: oPossum on April 10, 2019, 08:02:46 pm

On Semi MJW21194

https://www.onsemi.com/pub/Collateral/MJW21193-D.PDF (https://www.onsemi.com/pub/Collateral/MJW21193-D.PDF)

Title: Re: Replacement for TIP36 transistor
Post by: IconicPCB on April 10, 2019, 08:19:18 pm

That is wha I have done. Effectively a 2.5 ohm resistor did the trick.