The obvious answer would be the IRF240 and IRF9240 (the TO-3 parents of the IRFP TO-247 parts), but they'll be hard to find/quite possibly faked.
Sorry but no.
IRF(P)240/9240 are vertical/switching MosFet ; the Magnatecs are Lateral/audio types.
Very different, specially the biasing voltage.
Direct substitution will not work.
May I ask what does Vasquo need them for?
Maybe others can be used or the easy to find plastics fit there.
IRF(P)240/9240 are vertical/switching MosFet ; the Magnatecs are Lateral/audio types.
Very different, specially the biasing voltage.
Direct substitution will not work.
May I ask what does Vasquo need them for?
Maybe others can be used or the easy to find plastics fit there.
This I know all. Therefore I write "ask there". This means, a call to this company clarify, whether there are replacements available or not for the IRF240/9240 in TO 3 outline.
Newark has IRF240s in stock now and IRF9240s due in December, Newark "should" be trustworthy.
Craig
Craig
JM, this is for the amplifier schematic in the LME49830 datasheet.
Well, I'm a little surprise the TO-3 package is only 125W Pd vs (150Watt Pd on the TO-247 package), I thought the TO-3 package will have a higher Pd.
For a reasonable heat sink without fan or liquid augmentation, I would not allow more than about 30W dissipation per package. The 125/150W numbers are kinda bogus, as they assume a perfect heat sink and unacceptable temperature for the die inside the package. A TJ of 100C or so at max dissipation and max ambient temperature is a generally accepted limit for silicon devices.
Well, that datasheet clearly specifies IRFP parts, I'm baffled as to why you would want the TO3 ones 😱 , which by the way if ever existed are obsolete (so unobtanium/ultra expensive/etc.)
I thought you were repairing some old amp with heatsinks which only accept TO3 .
EDIT: as of dissipation, I am not surprised at all, TO3 is steel (worse conductor) while all of TO247 back is (tinned) pure copper. 😱
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