Copper to hole clearances for USB-C ports - Page 1
Forum section: electronics / general

author: delvo
author_rank: Contributor
timestamp: October 12, 2023, 09:25:26 pm
content: Hello,I feel like im going crazy to find a USB 2 only Usb-C port for a project I want to have build and assemblied at jlcpcb and Im having issues finding any port that meets their copper to hole clearance requirements. I contacted them to double check and its 0.254mm and all the ports I find look like they are violating that. They pretty much all come with an alignment hole which is really close to the pads. I attached an example. Am I misunderstanding something? And if not does someone know of a port that they have in stock that would work? I went through a lot all with similar clearances < 0.254mm. I would like to stick to usb 2 only ports if possible because thats all I need.Thanks!

author: ataradov
author_rank: Super Contributor
timestamp: October 12, 2023, 09:30:47 pm
content: There are no good and available USB2 only ports. At the same time, this connector (except for strange rear SMD mechanical mounts) is very standard and JLCPCB most certainly can manufacture it. If you are worried or they actually complain, just reduce the length of the copper pads a bit. 0.034 mm would not make a difference, especially given that it is within specified tolerance for the drawing.

author: newto
author_rank: Regular Contributor
timestamp: October 13, 2023, 12:44:27 pm
content: I've just been using these:https://www.digikey.ca/en/products/detail/gct/USB4105-GF-A/11198441Looks like they do have the holes too close (didn't even think about it until you mentioned it), but I've had 4 boards made now by JLCPCB with that footprint, and they haven't said anything about it yet. We're assembling them in house, but I can't imagine they'd have an issue if they supply a similar port.The holes *are* super annoying though, I'd like to be able to route out the power pins backwards, but the holes make it pretty much impossible if you want wide traces

author: dkonigs
author_rank: Regular Contributor
timestamp: October 18, 2023, 05:25:12 am
content: Quote from: newto on October 13, 2023, 12:44:27 pmI'm using the same exact connector on several projects of mine, including one where I've done a small production run. The boards are all made by JLCPCB, and I've never had a complaint or a problem.

author: delvo
author_rank: Contributor
timestamp: October 18, 2023, 09:17:29 am
content: I think i will try these:https://jlcpcb.com/partdetail/Korean_HropartsElec-TYPE_C_31_M12A/C5337088They dont have the USB4105-GF-A in stock and i dont really want to order them. I can report if I run into any issues but Im still waiting for some parts I order to get there.

author: pastaclub
author_rank: Regular Contributor
timestamp: October 20, 2023, 04:31:38 pm
content: Same thing here, I shortened the offending copper pads by a super-tiny amount until the rule violations disappeared in my CAD tool and JLCPCB produced and assembled the boards perfectly. They would probably even if you violate the rule (they fix lots of stuff themselves if the intention is clear, and they CAN manufacture with smaller tolerances, they just don't guarantee it).This connector is a suitable replacement for the GCT one:https://www.lcsc.com/product-detail/USB-Connectors_Shenzhen-Kinghelm-Elec-KH-TYPE-C-16P_C709357.html...and reasonably good quality although much more affordable.