Author Topic: Help me identify this component "A91Cd"  (Read 444 times)

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Offline Armadillo

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Help me identify this component "A91Cd"
« on: July 11, 2018, 03:08:33 pm »
Was repairing Antec 750W and came across this component marking "A91Cd" that I have never seen before.
Wonder what device is that.
Thanks;
 

Offline 4thDoctorWhoFan

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Re: Help me identify this component "A91Cd"
« Reply #1 on: July 11, 2018, 03:21:27 pm »
I believe that a A91 translates to a BAS17.
If you google BAS17, you should easily find a datasheet.   It's basically a diode between two of the pins.
 

Online cvanc

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Re: Help me identify this component "A91Cd"
« Reply #2 on: July 11, 2018, 04:18:54 pm »
One of the solder joints on that thing looks highly suspicious, FYI...
 

Offline Armadillo

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Re: Help me identify this component "A91Cd"
« Reply #3 on: July 11, 2018, 06:29:02 pm »
Thank you both for reply;

@4thDoctorWhoFan - Thanks, but I really don't think is a low voltage stabistor. I don't think this device would be used in PC power supply, would it? I don't know really. It near the LED side of the opto-isolator EL816, all 3 legs are used, hence I am inclined to think is the TL431 variants, not sure,. guessing.

@cvanc - Thanks for reply. Just checked and confirmed, its the lighting & shadow effect. Visually checked and continuity checked [pin and solder/track]

 

Offline amyk

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Re: Help me identify this component "A91Cd"
« Reply #4 on: July 12, 2018, 01:26:15 am »
That would be an AP431AR.
 
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