availability of IFP240 in to3 package?

[BrianGT]

I have some heatsinks with 6 - to3 mounting sockets on them each, and I was considering using them to make a Aleph 4. Are to3 irf240s around anywhere? I can't seem to find them. Is this not recommended? Is it better to just purchase new heatsinks and ditch the old ones?

Thanks,

--
Brian

 

[AudioFreak]

yeah the to-3 IRF240 devices are available ... Arrow are one source and there are many others such as digikey (i think).

 

[Nelson Pass]

They have become difficult to get, so if you find any
you might want to snap them up. Currently I'm living
off my inventory and expect to run out in 2007 🙂

 

[AudioFreak]

as i stated above, www.arrow.com lists these devices ....

Nelson, any idea why they are becoming hard to get?

 

[BrianGT]

yeah, arrow has them, but they are $6 each, which is twice the price of the IRFP240...

I think it would be cheaper for me to buy new heatsinks.

How does the matching compare for matching both the t-03 version compare to the to-274 version? Is the tolerance the same?

Thanks

--
Brian

 

[LBHajdu]

I have e-mailed International Rectifier asking them about these mosfets. They told me that they can make then at any time I need them. However there minimum order is really big I didn’t even want to ask how big. They told me the die inside the two mosfets is exactly the same. Just the case is different. Personally I am going with the to-274 version. If your heat sinks are drilled for t-03’s just use some thermal epoxy to glue an other aluminum plate over the t-03’s holes and drill for to-274.

 

[Nelson Pass]

The big manufacturers are getting out of TO-3
packages in general for cost and convenience
reasons as customers switch to plastics. I am
informed that we are way past "last call" from
IR and Harris.