soldering iron is the type of handheld soldering tool, used to join components on PCB and between other components. Heat goes through soldering rod to melt solder. Solder flows into the joint between components and PCB and any other components.
Soldering iron is the combination of two main basic parts
- heated metal tip
- an insulated handle.
Solder rod gets heated by passing an electric current through a resistive heating element.