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enter image description hereI have a USB 3.0 hub, Amazon Basics, and I need to identify this SMD component. I take a photo, it is mark B135H with some special characters like you see on image. Please, could you tell me which component is? I need to buy it and change.

enter image description here

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    \$\begingroup\$ if you do not know what it is, then how do you know that it requires replacement? \$\endgroup\$
    – jsotola
    Nov 23, 2023 at 7:47
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    \$\begingroup\$ I can't find anything with the marking, but the Q1 designator next to it suggests it's a transistor of some kind. Make a photo that shows more of the surrounding circuit and we can tell you more. \$\endgroup\$
    – nanash1
    Nov 23, 2023 at 7:48
  • \$\begingroup\$ Because i have another equal to this, and it is explode. I want to fix the other that is not working. \$\endgroup\$
    – Chipyto
    Nov 23, 2023 at 15:51
  • \$\begingroup\$ The pin next to the letter H (B135H) is directly connected to the 5v input power pin. \$\endgroup\$
    – Chipyto
    Nov 23, 2023 at 16:02
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    \$\begingroup\$ @Chipyto Thanks to the new picture I was able to find the MOSFET. Patricks answer is wrong. It's not a NPN transistor. \$\endgroup\$
    – nanash1
    Nov 23, 2023 at 18:38

2 Answers 2

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EDIT: Based on additional Info my answer is most likely wrong, since according to Chipyto pin 2 is at 5 V, which would not make sense with this part.

I'd say it is one of these two: enter image description here

Both are marked with B13, "5H" might be a manufacturing date. It is also a transistor, which would fit the silkscreen mark ("Q" is often used for transistors). The only difference between the two parts listed is the package, I believe what you need is the SOT-23 one but im not sure on that.

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It's a Sinopower SM2413PSAN P-Channel MOSFET.

enter image description here

I can't find a picture of the SM2413PSAN, but if we look at other MOSFETs from Sinopower, like the APM2300CAC-TRG, we can see that the marking style matches.

enter image description here

(Source: lcsc.com)

The pinout also matches with the one in the picture. OP said in the comments that pin 2 is directly connect to the 5V source.

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  • \$\begingroup\$ Thank you everyone for your help, i will try it to fix it with your details. \$\endgroup\$
    – Chipyto
    Nov 24, 2023 at 4:39
  • \$\begingroup\$ thanks for correcting me @nanash1, out of curiosity, how did you find that part? I used a couple different searchengines and all came up empty (besides the one i mistakenly posted) \$\endgroup\$ Nov 24, 2023 at 5:17
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    \$\begingroup\$ @PatrickFiedler These search engines are a decent starting point, but I always try to find pictures that confirm the part is the right one. In this case, the pictures of the NEC (now Renesas) part didn't match with marking shown in the picture, so I was sceptical. After OP added context, it was clear that it was likely a PNP BJT or p-channel MOSFET, so I searched for pictures of those transistors, mainly on LCSC, and looked if there was a manufacturer with the same marking style. That's how I found Sinopower. I used the way they describe the markings in the datasheet to find the right part. \$\endgroup\$
    – nanash1
    Nov 24, 2023 at 6:41
  • \$\begingroup\$ @nanash1 thank you for those insights! Im adding LCSC to my resources, that site seems really helpful for this sort of task (and the photos are incredibly useful). \$\endgroup\$ Nov 24, 2023 at 13:26

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