​In electric appliance repair is a common tool, so be very conveniently the soldering iron is a very important thing. In terms of experience, the following circumstance of soldering iron choice can consult;

First: fix the video audio device class (internal) buy 25 w - 40 w (external heated) 35 w - 50 w soldering iron is more suitable.

Second: fix the air conditioning, the refrigerator control circuit (internal) buy 25 w - 40 w (external heated) 35 w - 50 w soldering iron is more suitable.

Third: fix the air conditioning, the refrigerator main circuit (external heated) buy 75 w - 100 w electric is more suitable.

Fourth: fix the air conditioning, the refrigerator line buy (external heated) 300-500 w electric is more suitable.

Fifth: welding integrated circuit electronic products, mobile phones, main board, and other products, it is recommended to use a constant temperature soldering iron, welding small suit with pointed at ordinary times repair motherboard with cutting head is good also, very suitable welding, so to speak.

Household electrical wiring, general with more than 50 w or flat head is better, so that contact area is larger, with thicker wire welding power with large enough. With internal and external heated are two different ways of fever, general with internal heat fast, household electric:

Household electric:

35 w (1) household thermostat soldering iron: the soldering iron can not adjust temperature, but it can keep constant temperature for a long time in the 350-370 degrees, is used for welding of single panel is more appropriate. It's too big to circuit welding plate burning.

(2) with 50 w constant temperature soldering iron: the soldering iron is also cannot adjust temperature, the chamber can keep constant temperature for a long time in the 430-470 degrees, is suitable for welding double panel, if it is easy to damage the circuit board is used for welding sheet panel.

General household electrical appliances circuit board can choose 20 to 25 w, if you want to weld the other components that can choose 35-50 w, if welding pipe materials can choose 100 w, if welding cable head, such as water tank can choose 100-350 w.