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Old 1st February 2008, 08:50 PM   #1
Khron is offline Khron  Romania
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Default OnSemi FETs?

Has anyone used OnSemi power mosfets for an Aleph?

I've recently ordered 10pc of MTW32N20E (32A, 200V), along with some other stuff, to possibly replace the IRFP260N in the mini-Aleph J i'm putting together as a headphone amp. The specs look nearly identical.

Any reasons they might not sound properly / good?
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Old 1st February 2008, 09:06 PM   #2
steenoe is offline steenoe  Denmark
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For an Aleph amp, the CiSS value is of specific interest! The lower the better. All the On Semi's i have looked at, were useless.
Its pretty nice to have them as free samples though

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Old 1st February 2008, 10:13 PM   #3
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Old 2nd February 2008, 03:13 AM   #4
Khron is offline Khron  Romania
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Ciss for the OnSemi is specced as 3600 (typ) / 5000 (max) pF, as opposed to the 4057 (typ) for the IRFP260N. Comparable, i'd say
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Old 2nd February 2008, 10:17 AM   #5
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Quote:
Originally posted by Khron
Ciss for the OnSemi is specced as 3600 (typ) / 5000 (max) pF, as opposed to the 4057 (typ) for the IRFP260N. Comparable, i'd say
Perhaps, but it's the IRFP240 you should compare with, as it is what Pass specs.
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Old 2nd February 2008, 01:04 PM   #6
steenoe is offline steenoe  Denmark
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Quote:
Originally posted by mpmarino


Perhaps, but it's the IRFP240 you should compare with, as it is what Pass specs.
Excactly.

The most usefull Onsemi fets (for Pass projects) are the TO220's MTP10N and MTP12P. They are very nice for a BosoZ type PSU. (Drop in replacement) Ofcourse, they carry the J310 also, which gained some popularity lately

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Old 4th February 2008, 12:20 AM   #7
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Don't assume higher capacitance is always a bad thing. I've had at least one circumstance where the higher capacitance part sounded better.

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Old 4th February 2008, 12:34 AM   #8
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Old 4th February 2008, 04:26 AM   #9
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Old 4th February 2008, 04:35 AM   #10
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