Hi Everyone. I have a shorted diode marked 15A 435. It's most likely a Zener since it was connected with the anode to the ground. I tried to find its reverse voltage value on the internet without success. Can anybody help?
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Re: Possibly Zener diode identification
Post a picture or at least tell us the case style. -
Re: Possibly Zener diode identification
Reverse protection and freewheel diodes are also connected anode to ground. Perhaps also picture of original circuit could also help deduce type and value.Comment
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Re: Possibly Zener diode identification
Sorry Guys, you are right. I should have posted some pictures. The circuit board is a part of the Caterpillar in-cabin control display (a bunch of alarm lights and displays). Board number CAT 106-1154. Pictures attached. The diode's very bad quality (dark) photos are due to the barely readable markings, so I had to play with lighting under the microscope to show anything.Attached FilesComment
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Re: Possibly Zener diode identification
probably custom part numbers
show us a bigger area of the board - both sidesComment
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Re: Possibly Zener diode identification
Is this a 24V system? Caterpillar uses house numbered parts.
I would expect it to be a TVS for some solenoid output, protecting the nearby mosfet/transistor. Or protecting power for the board, but it's too small really.
cross post with more pics: https://www.eevblog.com/forum/repair...dentification/Comment
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Re: Possibly Zener diode identification
I suspect the 15A is only part of the number and the 435 is the date code located under the 15A
I would take a guess the complete number is:
1.5KE
15A
435
Too bad all the pictures can't be posted here as wellComment
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