Previously I was using traditional soldering wire 60/40 Sn/Pb (stannous)(lead). Restriction of Hazardous Substances (RoHS) says that Pb (lead) is dangerous for enviroment. So we should not use lead. When I searched a little, I saw that there was soldering in a wide variety of mixtures and I was a little confused. There is (video link) a wide variety of soldering wire examination,
Sn 99.3 Cu 0.7 the link
Sn 96,5 Ag 3 Cu 0,5 the link
2% Silver Solder Wire the link
at the video, if i don't get it wrong, He is saying solder wire with silver are better. I want to learn key factor of silver at solder wire. also some solder wire has copper, What is the benefit of 0.5 copper?
I am using solder wire for general purpose such as PCB, on circuit boards. Which mixture should I choose while soldering? I think this solder is the best Sn 96,5 Ag3 Cu 0,5