I don't know if it is the right forum for this question but I would like to know if I a can use classic Alloy (with Pb) to weld on PCB Pb Free Component. I think so but.... Thanks
Yes you can use Sn-Pb alloy on PB-free PCB, the board will work. But I don't think it's a good idea in mass production, that will have some negative effect on the endurance or your products.