What is the appropriate temperature of the soldering iron?
The temperature of an electric soldering iron is 300-400 ℃.
This is determined by the actual application needs of the soldering iron. Generally speaking, the temperature at which the soldering iron can solder a solder dot in 4 seconds is the appropriate temperature. If the soldering iron hair turns purple, it indicates that the temperature is too high.
Specifically, when it is necessary to insert electronic materials directly, the temperature of the soldering iron tip should be set between 330-370 degrees. If it is a surface mount material, the temperature is suitable between 300-320 degrees. The maintenance of the buzzer requires a temperature of 270-290 degrees, and the soldering temperature of large component pins cannot exceed 380 degrees. In addition, for special materials, special temperature settings are also required.
Soldering irons are divided into two types: external heating and internal heating:
An external heating electric soldering iron consists of a soldering iron tip, soldering iron core, housing, wooden handle, power lead, plug, and other parts. Due to the fact that the soldering iron tip is installed inside the soldering iron core, it is called an externally heated soldering iron. The soldering iron core is a key component of an electric soldering iron. It is composed of parallel winding of heating wires on a hollow ceramic tube, insulated with mica sheets in the middle, and connected to a 220V AC power supply through two wires.
The internal heating electric soldering iron consists of a handle, connecting rod, spring clip, soldering iron core, and soldering iron tip. Due to the fact that the soldering iron core is installed inside the soldering iron tip, it heats up quickly and has a high heat utilization rate, hence it is called an internal heating soldering iron. The commonly used specifications for internal heating soldering irons are 20W and 50W. Due to its high thermal efficiency, a 20W internal heating soldering iron is equivalent to a 40W external heating soldering iron.
The rear end of the internal heating electric soldering iron is hollow, used for fitting onto the connecting rod and fixed with a spring clip. When replacing the soldering iron tip, the spring clip must be removed first, and the front end of the soldering iron tip must be clamped with pliers and slowly pulled out. Remember not to apply too much force to avoid damaging the connecting rod.
