The difference between 30w and 60w soldering irons
30W and 60W soldering irons have different powers, different temperatures they can reach, and different heating speeds. For devices with relatively small thermal capacity and sensitive to temperature, it is best to use a low-power soldering iron. 60W can replace 30W, but 30W cannot replace 60W.
The relationship between power and temperature:
15W280℃----400℃
20W290℃----410℃
25W300℃----420℃
30W310℃----430℃
40W320℃----440℃
50W320℃----440℃
60W340℃----450℃
The power of the soldering iron used is too high, which can easily burn the components (generally, the junction temperature of the diode and transistor will burn out when the junction temperature exceeds 200°C) and cause the printed wires to fall off the substrate; the power of the soldering iron used is too small, and the soldering tin cannot be sufficient When melted, the flux cannot volatilize, and the solder joints are not smooth and firm, which can easily lead to false soldering. Generally, it is used for welding integrated circuits, printed circuit boards, CMOS circuits, decoration transistors, IC radios and recorders, and televisions. It is generally used for ordinary circuit experiments. Generally, 20W is suitable for repairing vacuum tube machines, such as tube amps and old instruments. , 35W is appropriate, and the external heating type is 45W. For welding the wiring of the large transformer and the grounding trunk line on the metal base plate, the internal heating type is 50W, and the external heating type is 75W. If you want to weld metal materials, you should use an external heating soldering iron with a power rating of 100W or more. If conditions permit, amateur radio enthusiasts can equip themselves with a 2OW internally heated soldering iron, a 35W internally heated or externally heated soldering iron, and a 150W externally heated soldering iron, which can basically meet various welding needs.
