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SMB Component Help Optiplex 3020 SFF

My Dell Optiplex 3020 Small Form Factor power supply has failed, I opened the power supply up and found the faulty component. I need help tracking down a replacement ad properly identifying the component. I have taken a picture with my microscope. I would greatly appreciate any help you can give me on this. Thank you in advance.

Here are a few images based on what you asked for. Thank you for helping me out.

Here are few images of the topside of the circuit board, I circled the 2 components on the topside and they appear to be ok.

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@johnnyblazing looks like a bit over overvoltage ;-) Components on the other side okay?

oldturkey03 의 2026년 1월 9일

@oldturkey03 I circled the 2 components on the topside and they appear to be ok.

Johnnyb 의 2026년 1월 10일

@johnnyblazing just make sure you double check those since they look like they may have gotten hot as well. Let us know how it worked out.

oldturkey03 의 2026년 1월 10일

I will keep you posted, I'm going to order the replacement components and put them in. Thank you for all of the advice, you have really help me to get started on this project. Thank you.

Johnnyb 의 2026년 1월 10일

Do you have any suggestions on where I can order these components from?

Johnnyb 의 2026년 1월 10일

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게시됨: 2026년 1월 8일

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@johnnyblazing what is the exact model number for your power supply? Post another image of you complete circuit board with your question. Mark the location of the component on that one so we can see the location etc. based on the complete board.

According to the makers mark and the numbering, this looks like a Littelfuse TVS diode SMCJ series (SMCJ180A) Transient Voltage Suppression Diodes Remember, there is always a reason why components fail. Double check your power supply for other issues after you replace the diode.

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SMB Component Help Optiplex 3020 SFF

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