| DoomPixie |
Hi everyone, Just found a big bad of what apear to be doides.. They are bolt shaped and have a terminal on the top, they have i diode symbol on the side along with motorola logo and the part number 44A417074. I couldnt find anything on the internet about them so i thought i'd ask on here and see if anyone could shed some light on them.
Cheers, Owen |
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| audioservice |
| Welcome to the world of unidentified components! Pass some current through the diode to identify if its a normal PN junction silicon diode. Then, using a series resistance to protect from overdissipation find the reverse breakdown voltage. It could be a zener diode and that would not be too handy for use as a rectifier. Testing for reverse recovery time is a bit trickier and I don't have time to go into it now. Look in a Motorola rectifier data book or browse a rectifier manufacturer's website to find similar parts to your lucky find part to get an idea what your part's ratings may be. That's about the best you can do next to a smoke test... |
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| DoomPixie |
just been haveing a look and there actually apear to be 2 different types..majority is the one i mentioned earlier 44A417074 and the others are also motorola but marked 9514..
I'll have a play and see what they do.. i have about 400 of them so i dont mind frying a few..hehe.. Here's a photo,. sorry about bad quality, i took it with webcam.
Owen
EDIT: forgot to atach pic.. also just maesured them with my multimeter on diode test.. one way measures open and one measures roughly 580 on both types..
Owen |
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| jneutron |
| quote: | Originally posted by DoomPixie
just been haveing a look and there actually apear to be 2 different types..majority is the one i mentioned earlier 44A417074 and the others are also motorola but marked 9514..
I'll have a play and see what they do.. i have about 400 of them so i dont mind frying a few..hehe.. Here's a photo,. sorry about bad quality, i took it with webcam.
Owen |
Call motorola applications. Many customers specify their own part number be printed on the body, the application guys should be able to tell you what they are.
Cheers, John |
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| DoomPixie |
| i remember where they came from now i think.. big 30Kg job lot of electronics components i bought for £10 when i was about 12Years old.. which means it was about 10 years ago i got them.. Also got some wierd mercuary filled timers in the lot that nobody has really ever had any idea what i should do with..lol.. |
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| FastEddy |
... is most certainly what they are. Possibly Germanium, possibly not. I once made a perfectly good voltage regulator full wave diode bridge from 10 Watt 200 Volt Zeners ... and they looked a lot like what you have here.
Try crossreferencing the number with an old RCA "Cross Reference Guide" ... or some such online.
:smash: |
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| djQUAN |
same thing I got here except that mine are in two legged TO-220 fully insulated types.
part number FMBG19A other sites mentioned it was sanken made.
after searching around in the internet, I found in a forum in foreign language that it is rated at 10A and 90V. measured the PN junction forward voltage to be 100+mV so I'm guessing these are schottky's. |
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| FastEddy |
" ... after searching around in the internet, I found in a forum in foreign language that it is rated at 10A and 90V. measured the PN junction forward voltage to be 100+mV so I'm guessing these are schottky's. ..."
... But I would not count on that ... But definately higher current diodes of legacy manufacture.
1N4004 would do the same (except the high performance Schottky type) ...
:smash: |
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| FastEddy |
:o
That 100 mV spec would indicate such ...
Oh, well ... |
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| bays_9a5tt |
| quote: | Originally posted by DoomPixie
others are also motorola but marked 9514.. |
looks like production datecode to me (YY and week of production) |
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| djQUAN |
| quote: | Originally posted by FastEddy
:o
That 100 mV spec would indicate such ...
Oh, well ... |
well, I measured Si diodes on the meter showed ~500mV so that could be schottky but I don't know if Ge diodes are still manufactured today at those current ratings. oh well. we will know once I use them in a SMPS rectifier and see what happens. |
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