Electronics > Beginners
Please help me identify this diode?
Acedias:
Hello everyone,
I am helping a friend with a power door lock issue on his car. We narrowed it down to the control unit under the dashboard that controls the power locks as well as power windows and ignition lock. I began by removing components out of circuit one by one and testing them. Capacitors, resistors, then diodes. Everything tested ok until i got to this diode. It is reading bad both ways using my meter.
Luckily all the diodes on the board seem to be the same. All have the same identification on the side, but i have had no luck with finding a replacement using the numbers.
I need some help identifying this diode.
On the side it has 0139 or possibly 3901 Or 01 3 9 depending on how you look at it.
The 01 goes one way and the 3 and 9 are turned the other way. (Attached pictures)
The others seem to measure anywhere between .570 and .593 vdc on my multimeter set to the diode test.
Any help and guidance would be appreciated.
floobydust:
I would say it's a Japanese part, non-JEDEC package. Possibly "R1" but you'd have to measure yours.
It's usually a vanilla rectifier diode rated 1.5-2A, skinny leads (small PCB holes) and smaller body. It all makes it hard to find a replacement in NA where everything is DO-41 and 1A or 3A with nothing in-between.
Jwillis:
The DO-41 ( DO-204-AL or SOD66) is a common semiconductor package used to encapsulate rectifier diodes.Typically 1N400X series.
Best guess it's equivalent to 1N4001.
Spork Schivago:
Could you provide a picture that shows where sideways letters meet the normal one, perferable one that shows most of the numbers on the diode?
Also, is there any numbers on the board itself? Such as a model number of the board? Probably a long shot, but sometimes, I can find schematics for various equipment.
Thanks!
Brumby:
--- Quote from: Spork Schivago on March 24, 2019, 01:12:26 am ---Could you provide a picture that shows where sideways letters meet the normal one
--- End quote ---
You can work that out by looking at the top right image. The top of the "3" is just visible.
--- Quote --- perferable one that shows most of the numbers on the diode?
--- End quote ---
You aren't going to get a single shot showing that, without some very clever optics - or some photo stitching.
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