On Fri, 28 Jun 2013 06:08:55 -0700 Jeff Liebermann
wrote in Message id: :

On Fri, 28 Jun 2013 08:45:19 -0400, JW wrote:

Looking for a suitable cross-reference for a National PF5301 TO-92 N
channel JFET as I can't find the original part anywhere. Hell, I can't
even find an original datasheet. The critical parameter for the sub is
Igss which for the National part is 1pA. The only thing I've been able to
find so far is a Linear Systems LS5301 which has a Ig of 1pA, but at $40 a
pop (!), I'd like to find an alternate.

Does anyone know of any possible substitutes?

http://www.datasheetarchive.com/2--PF5301-2-datasheet.html
Not exactly a data sheet, but it does have some specs. There should
be some other acceptable devices in the chart. 2N4117A or 2N4118 look
very close.

ITYM PN4117A and PN4118A. [Google] Or maybe so?

Those do look good and there seems to be some out there, but I'm not too
crazy about sources that ask for a RFQ only to tell you that they have a
$100 minimum. Was hoping for something I could buy at Digikey or Mouser or
some other distributor with no minimums.

Although there is a Vishay 2N4117A-E3
http://www.mouser.com/ProductDetail/...39y4wHUM%3d I
I wonder what the -E3 means? I found a datasheet, but it does not state
what -E3 is.

Vishay also has a 2N4118A.
http://www.mouser.com/ProductDetail/...dZHJqghFYzA%3d
In stock too. Maybe I'll give that one a go, wrong package but beggars
can't be choosers.

A pity that these are all EOL. *sigh*

Thanks, Jeff.