I am very new on this site and new to electronics. I need to ask for your help in identifying an SMD component. This is what it says on it. 0C ш Please help if you can. It's 0C and what looks like a capital E lying flat on its back. It is in a back light for my car. A Mercedes Benz ML550 enter image description here


closed as off-topic by Voltage Spike, pipe, Dmitry Grigoryev, Daniel Grillo, PeterJ Aug 27 '16 at 12:33

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  • "Questions on the repair of consumer electronics, appliances, or other devices must involve specific troubleshooting steps and demonstrate a good understanding of the underlying design of the device being repaired. See also: Is asking on how to fix a faulty circuit on topic?" – Voltage Spike, pipe, Dmitry Grigoryev, Daniel Grillo, PeterJ
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  • 2
    \$\begingroup\$ Please edit your question: (1) Fix the title to reflect the contents of your question. The existing title is useless. (2) Add a photo. There's an image button on the toolbar. How did you miss it? (3) Give context. What does the circuit it is in do. \$\endgroup\$ – Transistor Aug 25 '16 at 20:35
  • \$\begingroup\$ The photo is a big help but I don't recognise it. Someone will. \$\endgroup\$ – Transistor Aug 25 '16 at 21:00
  • \$\begingroup\$ mostly likely a diode with the sloped end marking the cathode \$\endgroup\$ – tcrosley Aug 25 '16 at 21:05
  • \$\begingroup\$ Could you add a rough measurement of the device (size of the black bit) so the package can be narrowed down. \$\endgroup\$ – Tom Carpenter Aug 25 '16 at 21:19
  • \$\begingroup\$ Also, it is more likely a 0 (zero) not a O \$\endgroup\$ – Tom Carpenter Aug 25 '16 at 21:20

It is the MM3Z5V6T1G - a 5.6V Zener diode from OnSemi in SOD-323 package.

From the datasheet we can see the following marking scheme:

Diode Marking

Note the date code location - placed at 90 degrees as you see in yours.

Also note that yours does have the Pb-free microdot in the bottom location (both are possible).

We can also decode the exact part number from the table in the datasheet:

Part Number

The 0C indicates it is the 5.6V version.

The package also matches the lead style in your photograph.

  • \$\begingroup\$ TC you are an angel, I mean that. Thank you so much i will try to see who's got it. OMG! \$\endgroup\$ – TeachMe Aug 25 '16 at 21:39

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