Hello,
I have blown a diode in an old function generator and need to replace it. The circuit board indicates that it was a zener diode, but I don't know what the breakdown voltage was.
The diode has the part number "2 2B2" or "2 282" (It's hard to read) but I haven't been able to find the specifications anywhere. The diode is in a DO-35 package.
Has anyone come across this part or know of a replacement?
Thanks.
-Matt
There are broker services that will help you - but that would probably be too expensive.
Do you have schematics anywhere? Know who made the function generator?
You need the reverse breakdown voltage rating. did you check out
Hi,
The function generator is a Tektronix CFG253. I called them this morning, and left a message, but they haven't called back yet.
I had another function generator of the same model and I extracted the diode in question. It appears to break down at about 1.5 Volts.
I checked out Digi-Key and others, but a search by the part number doesn't obtain any results, and they don't supply any zener diodes with breakdown voltages this low.
I made a temporary fix that seems to do the trick. It is a parallel combination of 1 signal diode from ground with two signal diodes in series to ground. I'm calling this a "~1.2V zener diode", but I'd like to get a replacement part anyway, so I'm going to keep searching.
Thanks for the quick response.
-Matt
Unemployed EE Guy wrote:
An old Archer book says that a 2B2 is a 276-1114, 1000V, 2.5A General Purpose type.
These guys may be able to help you out too.
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