Author Topic: Are 1.6mm PCBs obsolete now? USB-C connectors don't fit.  (Read 1527 times)

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Offline KasperTopic starter

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Are 1.6mm PCBs obsolete now? USB-C connectors don't fit.
« on: August 15, 2023, 05:49:23 pm »
I'm looking for a waterproof USB-C connector for an 8 layer PCB.  Wanted thru hole pins but they all have short pins.  Longest I've found is 1.0mm long pins.

Is no one using 1.6mm PCBs anymore?  What is the benefit of thinner PCBs, aside from the obvious desire to reduce product size by 1mm?

 

Online wraper

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Re: Are 1.6mm PCBs obsolete now? USB-C connectors don't fit.
« Reply #1 on: August 15, 2023, 05:52:30 pm »
Those pins are not supposed to necessarily protrude from an opposite side of PCB. Even though there are TH mounting pins for more mechanical strength, it's still an SMT connector soldered with SMT process only.
 
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Offline nctnico

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Re: Are 1.6mm PCBs obsolete now? USB-C connectors don't fit.
« Reply #2 on: August 15, 2023, 05:54:20 pm »
Also think about signal integrity where SMT is better compared to through hole. For as long as the metal tabs of the housing can be soldered into a hole for mechanical stability, I'm happy.
« Last Edit: August 15, 2023, 06:01:33 pm by nctnico »
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 
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Offline KasperTopic starter

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Online wraper

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Re: Are 1.6mm PCBs obsolete now? USB-C connectors don't fit.
« Reply #4 on: August 15, 2023, 06:07:06 pm »
On thicker PCB it may be hard to apply enough paste to fill the hole only partially occupied by a pin. If you do 1.6mm PCB, it would be better to use one with SMT type functional pins as providing enough paste for mounting tabs with Pin-in-Paste technology is much easier and solder preforms can be applied too. Such connectors are generally used in portable devices like phones where PCB thickness usually is on lower side. If you look on desktop PC hardware, it's generally 1.6mm and any cards that are put into slots must be 1.6mm to fit properly.
« Last Edit: August 15, 2023, 06:08:41 pm by wraper »
 
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Offline KasperTopic starter

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Re: Are 1.6mm PCBs obsolete now? USB-C connectors don't fit.
« Reply #5 on: August 15, 2023, 06:10:38 pm »
On thicker PCB it may be hard to apply enough paste to fill the hole only partially occupied by a pin. If you do 1.6mm PCB, it would be better o use one with SMT type data pins as providing enough paste for mounting tabs with Pin-in-Paste technology is much easier and solder preforms can be applied too. Such connectors are generally used in portable devices like phones where PCB thickness usually is on lower side. If you look on desktop PC hardware, it's generally 1.6mm and any cards that are put into slots must be 1.6mm to fit properly.

That makes sense.  Thank you.
 

Offline HwAoRrDk

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Re: Are 1.6mm PCBs obsolete now? USB-C connectors don't fit.
« Reply #6 on: August 16, 2023, 09:12:17 am »
I've seen some USB connectors where the through-hole pins are actually intended to be press-fit, not soldered. So the pins don't need to protrude all the way through the board.
 


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