Author Topic: Searching for SMD Top to Bottom connector  (Read 989 times)

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Offline JannehrlTopic starter

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Searching for SMD Top to Bottom connector
« on: April 06, 2020, 08:06:40 am »
Hello Guys,
im coming with a special request - im searching for a a simple SMD Connector that you can place on top of a PCB, but will connect to a connector at the bottom. You dont know what i mean? Well its a bit difficult to explain in text, thats why i made a little sketch of what would suit my needs( SMD Header connector, i didnt draw the body).

I need a connector for my Aluminium PCB`s (Aluminium = 1 Layer only) where i want to connect LED`s on top of the PCB to a PCB under that aluminium PCB.

I did search for such a connector, but honestly i dont even know what to search for (270 Degree connector? upside-down connector?).

Looking forward to your replies :)
 

Offline veryevil

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Offline max_torque

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Re: Searching for SMD Top to Bottom connector
« Reply #2 on: April 07, 2020, 01:17:48 pm »
can you drill / mill through your IMS pcb?  If so, "surface mount, bottom entry" are the key words..........    :-DD

https://www.google.com/search?q=surface+mount+bottom+entry


Obviously, you'll need a tight enough geometrical tollerance on the two pcbs to stop the pins that come up from the lower pcb, and through the top pcb actually touching and shorting on the IMS of that pcb
 
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Offline Wendy_Preston

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Re: Searching for SMD Top to Bottom connector
« Reply #3 on: April 09, 2020, 07:43:02 am »
Could you just use a horizontal THT pin header, but mount the tails SMT sideways, giving you the mating pin facing down?



If so, then you just need to determine if the pitch and pin size you need is available as a standard pin header. You'll probably need to glue or support the header before soldering, obviously.
Content Marketing and website technical content for Harwin (ex Design Engineer) - contact me on webmaster@harwin.co.uk.
 
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Offline TomS_

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Re: Searching for SMD Top to Bottom connector
« Reply #4 on: April 10, 2020, 01:07:33 am »
Some people have already mentioned it, but yeah, you need to flip your thinking 180.

On the board where you want the pins, use a bottom entry socket instead, and then place the pin header on the other board.  :-+

The bottom entry socket mounts on the top of the board like you want, and holes are drilled to allow the pins to poke through from below.

Search google images for "bottom entry socket" and you'll find some examples of how it fits together.
 
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Offline donotdespisethesnake

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Re: Searching for SMD Top to Bottom connector
« Reply #5 on: April 12, 2020, 03:54:17 pm »
I have four questions:

1. Is the connector intended to be edge mount, or anywhere on the board? i.e. can the substrate be drilled or routed?
2. What is the current and temperature rating required?
3. Surely this is a common requirement, how do other people do it?
4. Will we ever hear from the OP again?
Bob
"All you said is just a bunch of opinions."
 
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Offline JannehrlTopic starter

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Re: Searching for SMD Top to Bottom connector
« Reply #6 on: April 21, 2020, 09:06:35 am »
I didnt think id get that many answers :D
thank you all :-+

The tip about "Bottom entry" is pretty much exactly what i needed.
I really didnt know that most smd Pin Headers can be simultaneously used for bottom entry.
That pretty much solved my problem.
 


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