Fairchild interest alternatives - Page 2

buzzforb · 03:43 PM

I am almost 100% sure that i have secured what i believe to be the best alternative to the 19n20C. I have one more lead on the original, but if it doesn't pan out, I would suggest FQA16n25C. I will provide links to both datasheets and I believe you will see that they are almost identical in performance.

FQA19n20c link from digikey
MOSFET N-CH 200V 21.8A TO-3P - FQA19N20C

FQA16n25c
MOSFET N-CH 250V 17.8A TO-3P - FQA16N25C

This should allow you to get datasheet direct from Digikey

oiphy · 9th April 2012, 03:38 PM

The system cannot find the path specified

flg · 9th April 2012, 04:31 PM

Well, a fine spot we are in eyy? About now, I believe it is time to look back on some comments Charles Hansen made...

buzzforb · 9th April 2012, 04:58 PM

I remember reading this conversation. Fortunately, the P channel parts are not in question and the N channel substitute seem to match the original spec'd part extremely well. Better so than the standard 19n20 part that would be next in line in the 19n family.

buzzforb · 9th April 2012, 05:25 PM

Here is a link with Nelson commenting on the original parts.

Fqa12p20 Fqa19n20c Discontinuation

buzzforb · 10th April 2012, 01:18 PM

I can get FaArichild orginal FQA16n25C parts in sealed boxes. I have some samples on the way and will provide a comparison between it and the orginal 19n20c part. If all looks good, then i will put it into an F5T and try to get some distortion numbers to compare to the article. I also will try to contact all GB members and inform them of what is happening.

oiphy · 11th April 2012, 08:38 PM

so I checked out the datasheets and I agree with you buzzforb, seems that the 25c series is a good place to start. I applaud you for youre tremendus effort with this gb.
Thanks

Stig

pddjsteve · 11th April 2012, 08:50 PM

Thanks for all the work you've put into this. I'm behind whatever the group at large decides, so far it sounds like the 16N25C is the way to go.

dr.strangelove3 · 11th April 2012, 09:15 PM

Hi buzzforb,
Also thanks for all the hard work and the substantial investment on your part!
I'll go with the part you decide.

flg · 11th April 2012, 09:29 PM

Thanks buzzforb. I agree, the 16N25C is an excellent replacement for the 19N20C. I haven't had time to do the research on Charles Hansen's suggestion of basically selecting a higher voltage complement to get the Transcunductance down to match the P part. I use a 150V part sometimes that is 20S! I think we should look for 400V N parts?

View Poll Results: F5T 19n20C replacement
FQA19n20L	0	0%
FQA12n25C	10	83.33%
FQA32N20C	0	0%
FQA28N15	0	0%
FQP TO220	2	16.67%
Multiple Choice Poll. Voters: 12. You may not vote on this poll

9th April 2012, 03:36 PM	#11
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	I am almost 100% sure that i have secured what i believe to be the best alternative to the 19n20C. I have one more lead on the original, but if it doesn't pan out, I would suggest FQA16n25C. I will provide links to both datasheets and I believe you will see that they are almost identical in performance. FQA19n20c link from digikey MOSFET N-CH 200V 21.8A TO-3P - FQA19N20C FQA16n25c MOSFET N-CH 250V 17.8A TO-3P - FQA16N25C This should allow you to get datasheet direct from Digikey __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man! Last edited by buzzforb; 9th April 2012 at 03:43 PM.

9th April 2012, 03:38 PM	#12
oiphy diy newbie diyAudio Member Join Date: Sep 2011 Location: norway	The system cannot find the path specified __________________ " If you're going throu hell, keep going"

9th April 2012, 04:58 PM	#14
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	I remember reading this conversation. Fortunately, the P channel parts are not in question and the N channel substitute seem to match the original spec'd part extremely well. Better so than the standard 19n20 part that would be next in line in the 19n family. __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man!

9th April 2012, 05:25 PM	#15
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	Here is a link with Nelson commenting on the original parts. Fqa12p20 Fqa19n20c Discontinuation __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man!


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10th April 2012, 01:18 PM	#16
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	I can get FaArichild orginal FQA16n25C parts in sealed boxes. I have some samples on the way and will provide a comparison between it and the orginal 19n20c part. If all looks good, then i will put it into an F5T and try to get some distortion numbers to compare to the article. I also will try to contact all GB members and inform them of what is happening. __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man!

11th April 2012, 08:38 PM	#17
oiphy diy newbie diyAudio Member Join Date: Sep 2011 Location: norway	so I checked out the datasheets and I agree with you buzzforb, seems that the 25c series is a good place to start. I applaud you for youre tremendus effort with this gb. Thanks Stig __________________ " If you're going throu hell, keep going"

11th April 2012, 08:50 PM	#18
pddjsteve diyAudio Member Join Date: Jul 2010	Thanks for all the work you've put into this. I'm behind whatever the group at large decides, so far it sounds like the 16N25C is the way to go.

11th April 2012, 09:15 PM	#19
dr.strangelove3 diyAudio Member Join Date: May 2004 Location: Leeuwarden	Hi buzzforb, Also thanks for all the hard work and the substantial investment on your part! I'll go with the part you decide.

11th April 2012, 09:29 PM	#20
flg diyAudio Member Join Date: Jul 2005 Location: North East	Thanks buzzforb. I agree, the 16N25C is an excellent replacement for the 19N20C. I haven't had time to do the research on Charles Hansen's suggestion of basically selecting a higher voltage complement to get the Transcunductance down to match the P part. I use a 150V part sometimes that is 20S! I think we should look for 400V N parts? __________________ “Be who you are and say what you feel because those who mind don't matter and those who matter don't mind.” Dr. Seuss

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