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Old 01-11-2012, 11:54 PM   #1
cmj21973
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Default What is this component?

Need help identifing components marked CR(n) on an Onan generator control board.

CR4; CR5; Cr6; CR7 are diodes but, what are CR2 & CR3?

What kind of diode are they?

Will pull them to get markings and to test them tomorrow.
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Last edited by cmj21973; 01-12-2012 at 12:01 AM..
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Old 01-12-2012, 04:24 AM   #2
Evil Lurker
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Default Re: What is this component?

I'm guessing its an ultrafast sinterglass avalanche diode.

http://www.datasheetcatalog.org/data...shay/86040.pdf
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Old 01-12-2012, 04:31 PM   #3
cmj21973
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Default Re: What is this component?

Thanks Evil Lurker.

Pulled both and they are the same. Marked J5552 AKK.

Web search turn up this:
http://www.oberst-electronics.de/ll-d.html

DMM diode test (probe/comp.):
CR2 (+)/(+) (-)/(-) .505; (+)/(-) (-)/(+) .0L
CR3 (+)/(+) (-)/(-) .516; (+)/(-) (-)/(+) .0L

MM Ohms Rx1K (probe/comp.):
CR2 (+)/(+) (-)/(-) no reading; (+)/(-) (-)/(+) 4
CR3 (+)/(+) (-)/(-) no reading; (+)/(-) (-)/(+) 4

I think they test good, right?

Last edited by cmj21973; 01-12-2012 at 04:40 PM..
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Old 01-12-2012, 07:16 PM   #4
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Default Re: What is this component?

1N5552. Military spec.

http://www.datasheetcatalog.org/data...or/mXrurqs.pdf
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