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Old 29th July 2010, 02:21 AM   #1
diyAudio Member
Join Date: Jul 2010
Default WTB IRFP9240 MOSFETs

Hi All,

Been looking around on the internet to replace the output stages in an amp I've got. I'm looking for 2x5 (2 amp sections, 5 MOSFETs each. 10 total.) of these.

Digikey lists them as on order too. Is this a current production part that's just high in demand?
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Old 29th July 2010, 02:34 AM   #2
mach1 is offline mach1  Australia
Join Date: Sep 2004
Location: Brisvegas
IRFP9240 - eBay (item 300335639707 end time Jul-29-10 17:00:37 PDT)

no affiliation.
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Old 29th July 2010, 03:22 AM   #3
diyAudio Member
Join Date: Jul 2010
Aha, thanks. eBay didn't even occur to me.
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Old 29th July 2010, 04:04 PM   #4
diyAudio Member
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
Have you checked to see if these need to be matched. Usualy an output
stage will need matched devices.
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Old 29th July 2010, 05:54 PM   #5
diyAudio Member
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I'm looking into it. The schematic specifies 20-30mV across 5% .47 ohm source resistors.

The Vishay spec sheet doesn't give a spread of drain currents, so I'm not sure how to calculate the unmatched spread I might get...
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Old 29th July 2010, 05:59 PM   #6
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I have some. I'm figuring out how I want to approach this. By finding matched sets, matching myself, or buying unmatched and seeing how that goes.
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