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I'm trying to resurrect a computer board that was damaged by overvoltage, and I'm having trouble identifying one of the components.

It's a surface-mount chip, six pins, 2mm along its longest side, and the only identifying markings are the letters "KE".

From what I can tell by its position it is power related, either a transformer or a diode of some kind. The board has a 5V supply voltage. All instances of this component I've found are labelled as "DCn".

Close-up of chip, 6-pin "KE" IC highlighted with a red box

I've written to the manufacturer asking for a circuit diagram or list of parts, but I haven't heard back. Does anyone on here happen to know what this chip is and where/if I can find a replacement? If it makes any difference, the board is a Diamond Systems AUR-Z530 series.

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    \$\begingroup\$ From the designator DC Likely a clamping diode array, such as a TVS. It looks like just protecting the KBMS1 external header from ESD. Likely not at all related to your motherboard being toast from overvoltage. Also no manufacturer will support a common user with motherboard schematics, that's business critical info, they won't bother even answering. \$\endgroup\$
    – Justme
    Oct 18, 2022 at 11:25
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    \$\begingroup\$ Looks like pins 2 and 5 are the power rail(s), and the other pins are the TVS pins. Make sure none of them are shorted to the power rail(s). \$\endgroup\$
    – rdtsc
    Oct 18, 2022 at 12:19

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I actually heard back from the manufacturers in the end; it is indeed a diode/TVS array, specifically a PLR0504F. I was linked to a datasheet here: http://www.protekdevices.com/xyz/documents/datasheets/plr0504f.pdf

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