These TO220 packaged schottky diodes seem fairly common in switch mode
power supplies used in photo copiers and such now. I don't think you should
have much trouble finding a replacement. Perhaps you can find a junked
copier to get one from. The schottky diodes are fast acting and have less
voltage drop than silicon.
Don Black.
Miroslav Pokorni wrote:
?Hello Tom,
Motorola did a lot of Schottky and ultrafast recovery diodes in
TO-220
packages. Those were diodes for currents higher than 5 A and to
best of my
knowledge, none of them were JEDEC registered, so most likely single
source.
I have seen some other manufacturers putting out diodes in TO-220,
but very
few of them, not an industry wide practice. Some of those diodes
were pairs,
and others had tab connected to one of end leads. What you have
is either a
pair with one leg shorted or it is a bona fide single diode.
As Schottky diodes, TO-220 was used up to 30 A and for higher current
they
used TO-218 (a bigger package). In ultrafast recovery the line
was drawn at
16 A.
Hope, this helps somewhat.
Regards
Miroslav Pokorni
----- Original Message -----
From: "Thomas P. Gootee"
To:
Sent: Tuesday, September 16, 2003 11:41 AM
Subject: [hp_agilent_equipment] Need 3325A component ID
?
> Hi, all.
>
> I need help identifying a part on the power supply board of an
HP
> 3325A.
>
> It is CR10. But it resembles a TO-220 transistor.
>
> There are three separate part numbers on it: 1) 84-0266 (top
of front
> of device), 2) 8515, preceded by what looks like the Motorola
"M",
> inside a circle (bottom of front of device), and 3) 136725, printed
> on the top of the device.
>
> Terminals 2 and 3 (left to right, from front) appear to be shorted.
>
> And if anyone has schematics, or a service manual, that's already
> scanned or photocopied, I would be very interested.
>
> Thanks!
>
> Tom Gootee
>
> tomg(at)fullnet.com
>
>
>
>
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