Which kind of diode?

klitgt · 4th June 2005, 07:26 AM

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

AndrewT · 4th June 2005, 08:33 AM

Hi,
it could be a signal diode or zener.
Could you post a schematic?
maybe someone else recognises the code?

jondavis · 4th June 2005, 10:09 AM

try to find it at datasheetcatalog.com

klitgt · 4th June 2005, 10:43 AM

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.

Mr Evil · 4th June 2005, 11:23 AM

Those diodes are surely Zener's, acting as voltage references buffered by the transistors.

Netlist · 4th June 2005, 11:55 AM

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

klitgt · 4th June 2005, 02:59 PM

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.

Netlist · 4th June 2005, 03:02 PM

Provided info comes from ECA

/Hugo

klitgt · 4th June 2005, 03:19 PM

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?

Netlist · 4th June 2005, 03:24 PM

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

4th June 2005, 07:26 AM	#1
klitgt diyAudio Member Join Date: Sep 2004 Location: Denmark	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

4th June 2005, 08:33 AM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, it could be a signal diode or zener. Could you post a schematic? maybe someone else recognises the code? __________________ regards Andrew T.

4th June 2005, 11:23 AM	#5
Mr Evil diyAudio Member Join Date: Aug 2004 Location: Behind you	Those diodes are surely Zener's, acting as voltage references buffered by the transistors. __________________ https://mrevil.asvachin.eu/

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4th June 2005, 10:09 AM	#3
jondavis diyAudio Member Join Date: Nov 2004 Location: Manila	try to find it at datasheetcatalog.com

4th June 2005, 11:55 AM	#6
Netlist diyAudio Moderator Join Date: Jan 2003	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

4th June 2005, 03:02 PM	#8
Netlist diyAudio Moderator Join Date: Jan 2003	Provided info comes from ECA /Hugo

4th June 2005, 03:24 PM	#10
Netlist diyAudio Moderator Join Date: Jan 2003	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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