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Old 4th June 2005, 07:26 AM   #1
klitgt is offline klitgt  Denmark
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Default Which kind of diode?

Hi
In a PSU feeding an audio buffer, a diode has broken down and allows current to run both directions.
I do not know which type to replace it with.
It is a small 4mm long and 1.5mm thick glass thing, dark orange with the printing C16PH.
Does anyone know what it is, a Zener or what??
Would be happy for a reply
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Old 4th June 2005, 08:33 AM   #2
AndrewT is online now AndrewT  Scotland
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Hi,
it could be a signal diode or zener.
Could you post a schematic?
maybe someone else recognises the code?
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Old 4th June 2005, 10:09 AM   #3
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try to find it at datasheetcatalog.com
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Old 4th June 2005, 10:43 AM   #4
klitgt is offline klitgt  Denmark
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Quote:
Originally posted by AndrewT
Hi,
it could be a signal diode or zener.
Could you post a schematic?
maybe someone else recognises the code?

Does this help? I can not see what T2 is.
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Old 4th June 2005, 11:23 AM   #5
Mr Evil is offline Mr Evil  United Kingdom
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Those diodes are surely Zener's, acting as voltage references buffered by the transistors.
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Old 4th June 2005, 11:55 AM   #6
Netlist is offline Netlist  Belgium
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It's a Philips diode. C16PH is a type code for BZX55-C16, BZX79-C16 or BZV85-C16 depending on the power requirements.
Replacing with BZV85-C16 (1Watt) will surely meet the SOA needs.

/Hugo
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Old 4th June 2005, 02:59 PM   #7
klitgt is offline klitgt  Denmark
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Quote:
Originally posted by jondavis
try to find it at datasheetcatalog.com

Tried, but no matches. Google did not either come up with anything useful. Here is a photo. Thank's to those who gave suggestions, if no further replies I trust all you who participated.
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Old 4th June 2005, 03:02 PM   #8
Netlist is offline Netlist  Belgium
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Provided info comes from ECA

/Hugo
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Old 4th June 2005, 03:19 PM   #9
klitgt is offline klitgt  Denmark
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Quote:
Originally posted by Netlist
It's a Philips diode. C16PH is a type code for BZX55-C16, BZX79-C16 or BZV85-C16 depending on the power requirements.
Replacing with BZV85-C16 (1Watt) will surely meet the SOA needs.

/Hugo
Please explain this, SOA needs? I am naive in many of those expressions. The only one I know is IMHO = In My Humble Opinion, right?
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Old 4th June 2005, 03:24 PM   #10
Netlist is offline Netlist  Belgium
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In fact I hate abbreviations as much as you do.
SOA: Safe Operation Area. Someone had to explain this to me in the past as well.
In this particular case a 1 Watt Zener will be plenty as far as power dissipation is concerned.

/Hugo
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