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Old 10-14-2021, 01:44 PM   #1
cook
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Default Decipher part of this please: 4.7U_0805_25V6K

From a Dell laptop schematic, they list this SMD capacitor: 4.7U_0805_25V6K

I understand it all except the 6K at the end. What does that mean?

4.7U is capacitance
0805 is size of SMD capacitor
25V is 25 volts.
6K ???

Thanks
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Old 10-14-2021, 02:59 PM   #2
s675
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Default Re: Decipher part of this please: 4.7U_0805_25V6K

My ideas so far for the meaning of 6K:
  • Withstand voltage (6kV)
  • "Kemet code" (seen in some documents from Kemet)
  • 6 being unknown and K being 10% tolerance
  • Date code accidentally included
  • Reel quantity accidentally included (probably not, most are 5k, 10k etc)
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Old 10-15-2021, 11:13 AM   #3
PeteS in CA
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Default Re: Decipher part of this please: 4.7U_0805_25V6K

There's no way a 0805 has terminals spaced far enough apart to handle 6KV without arcing. The "K" could be 10% tolerance. Or maybe "6K" could designate the tempco (though the terminology would be something like "X7R" or "Y5V" or "Z5U").
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Old 10-15-2021, 04:45 PM   #4
cook
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Default Re: Decipher part of this please: 4.7U_0805_25V6K

In case it helps, the motherboard is a Compal LA-7781P - Dell Latitude E6430
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Old 10-15-2021, 05:04 PM   #5
R_J
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Default Re: Decipher part of this please: 4.7U_0805_25V6K

.

Last edited by R_J; 10-15-2021 at 05:10 PM..
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Old 10-16-2021, 07:24 AM   #6
cook
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Default Re: Decipher part of this please: 4.7U_0805_25V6K

Doing more searches on my question, I was able to finally find something that may make sense on this. A German site had my same question on it and they speculated that the 6K represented the minimum purchase quantity for the item. But I will continue to search on this and post any relevant findings.

One other thing.... In the schematic for this board, they have many capacitors with this label... 4.7U_0805_25V6K~D I thought the 'K~D' was very interesting to note!
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Old 10-16-2021, 02:46 PM   #7
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Default Re: Decipher part of this please: 4.7U_0805_25V6K

I've seen some identified as 7U_0805_25V6-K and have also seen the 6 replaced with a 7.

I'm with PeteS , K is tolerance and the 6 is the tempco.

It's not ordering quantity.
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Old 10-16-2021, 07:41 PM   #8
cook
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Default Re: Decipher part of this please: 4.7U_0805_25V6K

A found a few charts listing the codes for temperature coefficient (tempco) for capacitors, but I'm not sure I understood what 6 actually stands for. It seemed that some of the coding standards had different meanings for a 6. Would someone have a link to an article or chart that would describe what 6 means in this situation?
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