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Identify diodes and SCRs

I have some stud diodes and SCRs removed from an old VFD unit. All have

1/4-20 threaded studs. They are: SCRs (anode case): GE-55-305-601 GE-55-296-601 GE- and NL-55-323-122 Diodes: 55-238-601 (cathode case, Westinghouse) 55-278-601 (anode case, various) 55-215-601 (cathode case, IR)

Given the consistency I was wondering if someone might in fact have some data on these.

Thanks,

Tim

-- Deep Fryer: A very philosophical monk. Website @

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Reply to
Tim Williams
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Those numbers sound like house numbers - the mfr. stamps the customer's part number on them; if that's the case, you'd have to go back to the original maker of the VFD, if they still exist.

Or, you could test/characterize them in your lab.

Good Luck! Rich

Reply to
Rich Grise

That's the usual trouble with house numbers... still.. just a shot in the dark...

I could do stuff like gate trigger current, fall time, recovery time, breakdown voltage and maybe some others, but stuff like max dI/dt sounds like a destructive test to me. :-\\

Tim

-- Deep Fryer: A very philosophical monk. Website @

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Reply to
Tim Williams

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