What is the reason why the charger head at home often burns out?

The charging head at home often burns out. At first, I thought the charging plug was out of service, but after replacing it twice, it quickly burned out. I believe there are also some people who have had such experiences and encounters. So, what is the reason why the charging head at home often burns out?

The burning of the charging head is generally caused by the following reasons:

1、 Due to the poor quality of the charging head itself, when working under load for a long time, the internal part of the plug is burned out due to being unable to withstand it. The editor later replaced the charging head twice, so this reason can be ruled out.

2、 Due to unstable input voltage or containing high-frequency clutter. At this time, it is necessary to check for poor contact between the plug and socket, as well as whether there are high-power or high-frequency electrical appliances around, or to install a voltage regulator to improve.

3、 The load has a slight short circuit or intermittent short circuit, resulting in the power supply being burned out.

4、 Instantaneous overvoltage, which may be caused by power switching overvoltage. The power supply of the community comes from the power grid, which often has multiple power sources. At the moment of power switching, transient overvoltage may occur due to the incomplete synchronization of the three switching times.

For household electrical equipment, the ability to withstand overvoltage is also different. If an irregular and qualified charging head is used, the overvoltage capacity of general lighting and rectifier electrical equipment (such as chargers for various mobile phones, audio systems, and routers) is weak, and it is possible to burn out due to overvoltage. And the electrical equipment of the point machine category (such as washing machines, air conditioners, refrigerators, televisions) has a strong ability to withstand overvoltage, and short-term overvoltage and low voltage will not have a significant impact.

Regarding the frequent burning of the above charging heads, the power supply manufacturer Feitianying suggests that in addition to using legitimate and qualified charging heads, a surge protector should be installed in the household distribution box to prevent lightning strikes and suppress instantaneous overvoltage.