The limit is 280 degrees Celsius.

When repairing SMT components on printed circuit boards (PCBs), for resistors and capacitors below 1206 and components with an area less than 5 square millimeters, the solder joint temperature is required to be about 50 degrees Celsius higher than the solder melting point, which is between 250 and 270 degrees Celsius;

For large components, the temperature of the soldering iron is set between 350 and 370, and the maximum cannot exceed 390. The soldering time should not be too long, only a few seconds, and under this condition, it will not damage the solder pads on the PCB board.

Also known as printed circuit board, it is the provider of electrical connections for electronic components. It has developed for over 100 years; Its design mainly focuses on layout design; The main advantage of using circuit boards is that they greatly reduce wiring and assembly errors, and improve automation levels and production labor.