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The MOSFET is on a laptop motherboard close to the power jack. The part reads: D1 GNA and 2R1H01 It's faulty so I'm looking to replace it.

I added some pictures of the area + the MOSFET. The laptop is an HP Elitebook 850 G1 (I haven't had any luck finding schematics but maybe someone else has more luck). And I found this code on the motherboard: 6050A2560201-MB-A03.

photo of device

photo of PCB

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  • \$\begingroup\$ Are you even sure it's a MOSFET and not some other device in a similar package? \$\endgroup\$
    – Hearth
    Commented Dec 18, 2023 at 20:48
  • \$\begingroup\$ I'm not sure if it is just the way the picture was taken, but the 3-pin device north east of SW152 gives the appearance that the device may have overheated. On closer inspection, are there any devices with sign of damage such as a cracked package? \$\endgroup\$
    – Chester Gillon
    Commented Dec 18, 2023 at 21:27
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    \$\begingroup\$ Hello, the component appears completely normal under the microscope. It appears my camera didn't do it justice. I have also looked at other components in the region and none of them have any signs of damage. \$\endgroup\$
    – Hidde
    Commented Dec 18, 2023 at 21:32
  • \$\begingroup\$ From the marking style, the manufacturer is likely Niko-Sem or Unikc, I can't find a part with a "D1" product code though. \$\endgroup\$
    – nanash1
    Commented Dec 19, 2023 at 9:04
  • \$\begingroup\$ Really odd that there is nothing on the internet about this MOSFET. Do you think there might be another MOSFET I can get away with using as a replacement? \$\endgroup\$
    – Hidde
    Commented Dec 19, 2023 at 12:25

2 Answers 2

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After looking in the datasheet of the "HP EliteBook 840 G1" and looking for Q6010 I now believe it to be the AON7403 MOSFET. I don't know enough about MOSFET's to confirm this however. Thank you all for your help.

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  • \$\begingroup\$ Unfortunately, AO doesn't seem to put part marking information in their datasheets. What leads you to think it's an AON740? \$\endgroup\$
    – Hearth
    Commented Dec 19, 2023 at 13:33
  • \$\begingroup\$ On the datasheet of a similar laptop motherboard, right under Q6010 it says ALPHA_AON7403L_DFN_8P. This brought me to the AON7403, the MOSFET's appear to look identical. I'm not certain but it's the best I can find. \$\endgroup\$
    – Hidde
    Commented Dec 19, 2023 at 13:36
  • \$\begingroup\$ Without knowing what it's doing, I can't say for certain, but the AON7403 seems like a reasonable enough MOSFET. It can be driven at 10 V or at 5 V and has reasonably low on-resistance at either drive condition. The package is a common one, so "looks identical" isn't really enough of a clue (there are thousands of MOSFETs that look identical to this one if you ignore the markings), but the characteristics look pretty reasonable for a power FET on a computer motherboard. The only problem is that it's obsolete, so you might need to replace it with a different part. AO recommends their AONR21321. \$\endgroup\$
    – Hearth
    Commented Dec 19, 2023 at 13:45
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    \$\begingroup\$ @Hearth The search aosmd.com/… is filtered on the aosmd.com site for markings for AON7403. It finds aosmd.com/sites/default/files/res/markings/AON7403.pdf. The marking in that document doesn't match that from the picture in the question, but could be compatible in a DFN3X3 package. \$\endgroup\$
    – Chester Gillon
    Commented Dec 19, 2023 at 13:47
  • \$\begingroup\$ @ChesterGillon The main problem, I suppose, is figuring out if it's supposed to be a P-channel or N-channel FET in that position. After you know that, probably most reasonably-spec'd FETs would work. It doesn't look like this is part of a switching converter (no nearby inductor) so you wouldn't need to be as careful about capacitances. \$\endgroup\$
    – Hearth
    Commented Dec 19, 2023 at 14:02
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It's probably a Unikc PZ2003EEA P-channel MOSFET. The datasheet doesn't specify the markings, but I found a listing on shopee with a (low quality) picture that shows a "D1" product code.

enter image description here

(Source: shopee.co.id)

Here is a better picture of another Unikc MOSFET (PE534BA) in the same package that shows the marking style of this manufacturer as reference.

enter image description here

(Source: aliexpress.com)

Note: The MOSFET is also available from Niko-sem.

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