Phosphor bronze is not the most easily wetted alloy and often requires a
fairly active flux. For this reason, PB parts are often pre-tinned,
using a water-soluble flux for the process, followed by a good wash.

Brian

Wee Mei wrote:
> Hello,
>
> During assembly inspection, noticed that the solder joints on the 2 sided
> leads for Hirose connector, MQ172-3PA do not wet well. From the datasheet,
> it seems to be of phospher bronze. As I am not a chemical gal, is this the
> cause as we are using Sn37/Pb63 solder with liquid flux.
>
> Thanks in advance for your response.
>
> Regards,
> Wee Mei
>
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