Electrical – JST 1.25mm connector soldering

connectorsolderingsurface-mount

I'd like to SMD solder the JST 1.25mm connector below with horizontal orientation aligning it to the side of the PCB (ie. in the end the male header should be plugged to the connector from the side of the PCB not from above the PCB). As visible the pins on the rear side are raised from the bottom plane of the connector so they don't touch the PCB when the connector is layed on it.

Is this connector meant to be soldered the way I described, or is it just a through hole connector meant to be soldered with a vertical orientation? If the former is true, how to solder it, just put enough solder paste/tin under the pins to fill the space?

What is the proper name for this type of connector?

The product link where I bought the connector:
http://www.ebay.com/itm/231443803216

Rear side-1:
Rear-1
Rear side-2:
Rear-2
Bottom side:
Bottom
Front side:
Front

Best Answer

Is this connector meant to be soldered the way I described

Not really, but don't let that stop you.

or is it just a through hole connector meant to be soldered with a vertical orientation?

Yes.

If the former is true, how to solder it, just put enough solder paste/tin under the pins to fill the space?

  • Put pads on the edge of your board, something like the edge of an ISA PC card.
  • Put one or two plated through vias in each pad
  • Hold connector in place, flush with board
  • Solder

Solder will wick into the vias, and this will increase mechanical strength. It should be a bit stronger than simply relying on pad adhesion onto the PCB.

This isn't something you'd do in a fabrication run, because it has to be hand soldered, but it'll be much stronger than a wimpy SMD connector. Like the micro-USB in your smartphone/tablet which falls off the board if you plug in the charger wrong.

I do it all the time with 0.1" headers for prototyping, and the headers will bend before the solder breaks.

Related Topic