I have a PCB using 2 'PH48' zeners. Chinese mfg. I cannot find any information on this designation in order to find a datasheet. Anyone know what part it is, where I could get a datasheet?

I also have another diode, possibly a zener that is marked 'C6V85T'. Same question.

Any help?

thx
B

 

The latter might be a 6.8V zener. Some manufacturers put the zener voltage in their part number.

Don't know about the others; 4.8V isn't a standard value.

 

Have you tested the PH48 to find its regulator voltage? Are you sure it is a zener? Form factor would help guessing at current rating.

 

You can use the power supply and adjust to +10V and then in series with a resistor as 330~430Ω to test their zener voltage, if they are zeners, zener diode should be draw exceed 5mA, so it can get a stable zener voltage.

 

can you post a picture?

 

Hi all- sorry I was not able to circle back on this sooner. I've identified the 'C6V85T' component as a 6.8V zener. I finally figured the other part out as well: PH4148 - It's a Philips 1N4148. I couldn't see the 41 because of other components on the PCB, until one end (was apparently weak) gave way while I was trying to wipe it, so I could then stand it up.

Thank you all for your help.

 

Sounds like you may have discovered the issues also.