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Need 3325A component ID
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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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Hello Tom,
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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" <tomg@...> To: <hp_agilent_equipment@...> Sent: Tuesday, September 16, 2003 11:41 AM Subject: [hp_agilent_equipment] Need 3325A component ID Hi, all. |
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Don Black
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.
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Don Black. Miroslav Pokorni wrote: ?Hello Tom, |