Author Topic: CEC P85 - Unknown Component  (Read 429 times)

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Offline 2XTopic starter

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CEC P85 - Unknown Component
« on: September 25, 2023, 05:36:55 pm »
Hello,
I have the below component on a power supply but I can't understand what it is. I measured it with 121GW Multimeter with diode mode (15V scale) and the results didn't give me a clear picture of what exactly is this component.


http://www.smdmark.com/en-US/search/code?id=P85]http://www.smdmark.com/en-US/search/code?id=P85


http://markingcodes.com/search/c/P85


https://en.wikipedia.org/wiki/Small-outline_transistor]https://en.wikipedia.org/wiki/Small-outline_transistor


« Last Edit: September 25, 2023, 05:46:08 pm by 2X »
 

Offline fzabkar

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« Last Edit: September 25, 2023, 05:46:12 pm by fzabkar »
 
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Offline 2XTopic starter

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Re: CEC P85 - Unknown Component
« Reply #2 on: September 25, 2023, 06:01:22 pm »
Thanks for the reply. The P85 means something? I will go with the BC869 because it is the same in electrical characteristics with the BC860, but the BC869 is available for buying in many places.
One more thing... there where the multimeter shows approximately 10V... why shows 10V and not OL?

P.S. My mistake P58.
« Last Edit: September 25, 2023, 06:03:30 pm by 2X »
 

Offline fzabkar

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Re: CEC P85 - Unknown Component
« Reply #3 on: September 25, 2023, 06:11:25 pm »
I'm guessing that "85" is a YW (Year/Week) date code.

I'm not familiar with your meter.
 
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Offline 2XTopic starter

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Re: CEC P85 - Unknown Component
« Reply #4 on: September 25, 2023, 06:13:37 pm »
Many thanks for your help.
 

Offline Swake

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Re: CEC P85 - Unknown Component
« Reply #5 on: September 25, 2023, 08:41:00 pm »
Was it still soldered on the PCB when you measured it? If that is the case then that 10V reading is interference from other components on the board.
If you want to make 100% certain it reads ok, then you measure it removed from the board.

You mention that you want to buy some. Is this because you think it is broken and want to replace it? I don't think it is broken because on your schematic between left pin and middle pin you measure a junction (0.7V), and from the left to the right pin too. That sounds like a transistor to me.
When it fits stop using the hammer
 
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Offline Swake

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Re: CEC P85 - Unknown Component
« Reply #6 on: September 25, 2023, 08:42:25 pm »
Datasheet for BC869
When it fits stop using the hammer
 

Offline 2XTopic starter

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Re: CEC P85 - Unknown Component
« Reply #7 on: September 25, 2023, 10:56:55 pm »
Was it still soldered on the PCB when you measured it? If that is the case then that 10V reading is interference from other components on the board.
If you want to make 100% certain it reads ok, then you measure it removed from the board.

You mention that you want to buy some. Is this because you think it is broken and want to replace it? I don't think it is broken because on your schematic between left pin and middle pin you measure a junction (0.7V), and from the left to the right pin too. That sounds like a transistor to me.

The measurements that I 've done was with the component removed from the PCB. I too beleive that is a tranzistor.
 


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