What is the operating temperature of an electric soldering iron
The temperature of an electric soldering iron is 300-400 ℃.
Specifically, when direct insertion of electronic materials is required, the temperature of the soldering iron head should be set between 330-370 degrees. For surface mount materials, the temperature is suitable between 300-320 degrees. The repair of the buzzer requires a temperature of 270-290 degrees. The welding temperature of large component feet cannot exceed 380 degrees. In addition, special materials require special temperature settings.
There are two types of soldering irons: externally heated and internally heated:
The externally heated electric soldering iron consists of a soldering iron head, a soldering iron core, an outer shell, a wooden handle, a power lead, a plug, and other parts. Due to the installation of the soldering iron head inside the soldering iron core, it is called an externally heated electric soldering iron. The soldering iron core is a key component of an electric soldering iron. It is composed of parallel winding of electric heating wires on a hollow ceramic tube, with a mica sheet insulation in the middle, and two wires connected to a 220V AC power supply.
An internally heated electric soldering iron is composed of a handle, a connecting rod, a spring clip, a soldering iron core, and a soldering iron head. Due to the installation of the soldering iron core inside the soldering iron head, it generates heat quickly and has a high heat utilization rate, hence it is called an internally heated electric soldering iron. The commonly used specifications for internal heating electric soldering irons are 20W and 50W. Due to its high thermal efficiency, a 20W internal heating electric soldering iron is equivalent to around 40W external heating electric soldering iron.
The rear end of the internally heated electric soldering iron is hollow, used to fit onto the connecting rod and fixed with a spring clip. When replacing the soldering iron head, the spring clip must be removed first, and at the same time, the front end of the soldering iron head must be clamped with pliers and slowly pulled out. Remember not to use too much force to avoid damaging the connecting rod.
In mobile phone maintenance, it is often necessary to replace the components on the circuit board, which requires the use of an electric soldering iron and has high requirements for it. This is because the components of mobile phones use surface mount technology, which has a small volume, high integration, fine printed circuits, and small solder pads.
If the selection of electric soldering iron is not appropriate, it is easy to cause human faults during the welding process, such as false soldering, short circuit, or even soldering out the circuit board. Therefore, it is necessary to choose high-end electric soldering iron as much as possible, such as using a constant temperature and anti-static electric soldering iron. In addition, some large devices such as shielding shields require high-power soldering iron, so it is necessary to prepare a regular thick headed soldering iron with a power of over 60W.
