I am struggling with soldering some pretty think gold plated DIA pins to one of my boards.

the pins I'm referring to

I've tried various things such as;

  1. Increasing the heat of my soldering iron, but am afraid of burning my board.
  2. Sand off some of the gold plating to try and make the connection easier.
  3. Increase the amount of flux I use.
  4. Increase the time I'm heating the pin/board.

None of the above have given me favorable results. I'm hoping some of you here can steer me in the right direction.

I think I might be too careful and need to heat the pins/connection much more due to the heat dissipation of the thick pins, but before I do that and break things I want to check with some of you.

Thank you very much, I appreciate any responses.

  • 2
    \$\begingroup\$ What soldering iron are you using? Doing this with a 20 W unregulated (no temperature control) iron with a small tip: no go. Doing this with an 80 W temperature controlled iron with a wide tip (large thermal mass): easy. You want to solder this quickly so you need a large thermal mass so that the pin and PCB heats up quickly without the temperature dropping below the melting point of your solder. \$\endgroup\$ Commented Mar 11, 2020 at 9:59
  • \$\begingroup\$ Keep in mind that unless the gold plating is very thin, 10-20 microns or less, then it is not recommended to solder directly to gold. \$\endgroup\$
    – SteveSh
    Commented Mar 11, 2020 at 10:35
  • \$\begingroup\$ You can also try heating up the entire board before doing the soldering. This is what's done in mass production solder reflow operations. \$\endgroup\$
    – SteveSh
    Commented Mar 11, 2020 at 10:37
  • 1
    \$\begingroup\$ "Sand off some of the gold plating to try and make the connection easier", well the gold is the easiest to solder. Those are contacts are for use with a mating connector. \$\endgroup\$ Commented Mar 11, 2020 at 10:48
  • \$\begingroup\$ @Bimpelrekkie Thanks for your response, I'm using a Hakko FX-888D which is a temp regulated 70W soldering Iron, I have a big tip on the end. \$\endgroup\$ Commented Mar 11, 2020 at 11:00

1 Answer 1


I solved this by following @brimelrekkie's advice. I increased the heat (from 300 to 380) and changed the type of solder and it worked fast and flawlessly.


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