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Old 29th January 2007, 03:14 PM   #1
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Default What is this -OI- ?

This -OI- is printed on a pcb under a diode. Zener ?
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Old 29th January 2007, 03:18 PM   #2
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Could it be a - stylized - indication of polarity, O = anode, | = kathode?

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Old 29th January 2007, 04:12 PM   #3
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There are also standard symbols for diode and zener on the pcb, it is Sony.
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Old 29th January 2007, 09:57 PM   #4
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Isn't that a symbol for a current source diode (essentially a JFET with the gate and source leads internally connected)?

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Old 30th January 2007, 04:57 AM   #5
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yes that's a current source "diode" symbol..... what's the part number on the component?
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Old 30th January 2007, 09:42 AM   #6
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YD13

Can not find it on

http://www.datasheet.org.uk/datasheet-mc.html

http://www.alldatasheet.com/

Any more good & free datasheet sites ?
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Old 30th January 2007, 10:03 AM   #7
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http://www.datasheetcatalog.com/data.../1/BYD13.shtml

BYD13: Controlled avalanche rectifier
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Old 30th January 2007, 03:47 PM   #8
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Hmmm it looks like a current source diode, it is in series with a zener between V- and ground.
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