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Matched irfp250n transistors on ebay

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Mattyo5

Member
Joined 2002
I bought 200 transistors and have matched them. The groups that i matched are on ebay. I only kept a few for myself. Just thought I'd give you guys a heads up. Digikey has the $ at 3.33 each, my $ is about $5 each including ship to lower 48.

I have groups of 3,4,6,12,16, and 20 up for sale, the group of 16 and 20 are single groups (rare to match this many unless you're starting with 200+ transistors), and there are multiple other groups. Have a look at all the auctions! Thanks guys!

-Matthew K. Olson

http://search.ebay.com/_W0QQgotopageZ1QQsassZmattyo5QQsorecordsperpageZ50QQsosortpropertyZ1

or for the auction of 20 matched:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=4666&item=3866219286&rd=1&ssPageName=WDVW
 
M

Mattyo5

Member
Joined 2002
Well no takers so far. I thought these transistors would be a big hit. I did some searching here on DIYAUDIO for uses for these transistors. irfp250n are an upgrade from irfp240, and work well (i think) in just about any application that irfp240 uses, although there is no complimentary transistor to irfp250n yet. Some links to searches here on diyaudio might help

http://www.diyaudio.com/forums/showthread.php?s=&threadid=9454&highlight=irfp250n

http://www.diyaudio.com/forums/showthread.php?s=&threadid=41092&highlight=irfp250n

http://www.diyaudio.com/forums/show...08&perpage=10&highlight=irfp250n&pagenumber=3

http://www.diyaudio.com/forums/showthread.php?s=&threadid=10935&highlight=irfp250n

http://www.diyaudio.com/forums/showthread.php?s=&threadid=40506&highlight=irfp250n

someone mentioned to me that because of the gate capacitance, its best to use these transistors in half the normal quantity, for instance, if aleph 2 uses 12 irfp240's, to maintain the gate capacitance use only 6 irfp250n's, because the irfp250n's are basically akin to two irfp240's in parallel but in a single chip package... someone please correct me if i'm wrong



here's an answer to what the "n" designation is for, down at the bottom of the page

http://www.diyaudio.com/forums/show...83&perpage=10&highlight=irfp250n&pagenumber=2

hope this helps!

i'll try to eventually put up some other transistors that are matched as well, including irfp044's :)


-Matthew K. Olson
 
richie00boy

richie00boy

Member
Joined 2003
readresearch.co.uk
You might like to see this post I wrote about these devices and using them as replacements for others.

I would not recommend only using half the number of IRFP250N as you would need IRFP240 because they only have about the same SOA as the 240s so would fry. The old IRFP250 would be fine though.

The N designation indicates that the device is 5th generation and has a smaller die, hence SOA is not as good as the older ones. The advantage is that the smaller die costs less.

Good luck with the sale :)
 
M

Mattyo5

Member
Joined 2002
Good call on the SOA. I imagine that the dissipation is the same since the package is the same. to247. I'm keeping a few of these for myself, and i may try some of them in an aleph 2.... they are not stock replacements b/c of the capacitance, but still... should be a little more robust (amperage) than the 240's, though the SOA is similar. Thanks for the clarification :)

-Matthew K. Olson
 
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