When excessive current is needed for PCB wiring, tin is usually laid on it. What is the standard (such as thickness) for tin coating of prawns? sfyfbz @ 163 . com

It can be seen that the cross-sectional area of copper foil, temperature rise and the situation of inner and outer layers will affect the flow situation.

It is not allowed to increase the width of the conductor. Add a solder layer on the conductor (generally, a conductor with a solder layer of about 0.6 can be added to the conductor of 1mm, but you can also add a solder layer to the conductor of 1mm), so that the conductor of 1mm can be regarded as a conductor of 1.5mm~2mm after tin plating. This standard is generally calculated according to the normal tin thickness. There are many factors that affect the thickness of tin, such as general pins. PITCH & lt=0.4mm, only 4mil tin thickness can be opened, and it can be opened above 5mil if it is more than 0.4mm.