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Hirose through-hole USB connector - why such short legs?
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HwAoRrDk:
I need a Mini-B USB connector for something, and because I want one that has a fairly strong attachment to the board, I have been looking at through-hole connectors.

I was considering the Hirose UX60SC-MB-5S8. But there's one thing that puzzles me about this particular connector: the length of the anchoring legs is only 0.8mm. ???

What kind of PCB thickness are they expecting you to use with it? The legs are literally half the depth of a standard 1.6mm board. How are you supposed to solder them? :-// Sure you can flow solder into the hole, but what's to say you're actually making a good joint with the leg?
voltsandjolts:
Maybe intended for cheapo 0.4mm laminates?
Dave:
I think you will find that not many consumer electronics gadgets use what you consider to be standard 1.6mm thick PCB. For something compact, where space is a premium, you'd just want the prongs to be long enough to make a decent mechanical support, but not stick out more than needed.
drussell:
The less expensive ones like those Hirose tend to be made (as mentioned above) for cheaper, more compact, consumer type things that tend to have thinner boards.  The Hirose UX series datasheet does say:


--- Quote ---Note 1: Types with different dip style termination lengths can also be provided.
...
Please contact your Hirose Electric account representative for details.
--- End quote ---

Good luck trying to find some in small quantity already in stock somewhere, though.  :)

If you do see any listed anywhere with a suffix other than the 8 (and not T for SMD) it might be worth a closer look, though, just in case.

If you can handle connectors that cost at least a few times more (but are possibly even more robust) you could look at the ones by outfits like Molex or Amphenol.  More of those are likely to have longer pins by default.  Maybe something like a 1734510-1, for example, since it says "PCB Thickness (Recommended) : 1.6 mm [ .063 in ]" ??

HwAoRrDk:
No, I haven't seen any other variations listed anywhere other than the SMT one. I suspect it's make-to-order for other through-hole lengths.

I have been considering the Molex 54819-0519 instead because of this, even though it's more expensive. But I have also just found a no-name Chinese through-hole part at LCSC, which costs pennies each, but I'm not sure whether I could count on the quality with those. Although, if they're anything like the kind you get on $3 clone Arduino boards, might be okay, as those seem to be robust enough in my experience.
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