MTX 4202 - IRF540Z or IRF540N? - diyAudio
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Old 3rd April 2011, 01:18 PM   #1
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Default MTX 4202 - IRF540Z or IRF540N?

Trying to locate some of these... digikey has the "Z" version in stock, but none of the "N". Which style is in this amp? I'm almost certain they are N seeing as the cover says "Pure N channel design", but just wanted to be certain I'm ordering the right part. The part number on the transistor only says IRF540...

Any place else I can get IRF540N's in stock?

Thanks guys.
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Old 3rd April 2011, 01:22 PM   #2
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If the originals didn't have the 'N' suffix, I wouldn't use them. I'd suggest the IRF540A of the IRF540 with no suffix except PBF.
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Old 3rd April 2011, 01:31 PM   #3
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O.K. thanks Perry. Glad I asked, lol. The transistor has the IR logo on it. Nothing about being PBF.

It appears that Gerber has the actual IR 540's. I might just order them or is the A version a better upgrade? Thanks for the link.

Last edited by Deadly Sones; 3rd April 2011 at 01:37 PM.
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Old 3rd April 2011, 01:49 PM   #4
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I don't think the 540A is an upgrade. I use them simply because I've never had a problem with them. The IRF540Ns can cause problems in some amps. I haven't tried all of the other versions in all of the amps I've repaired. The 540A has been safe. I think the original IRF540 (no suffix) is also safe.
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