Can DC fuses and AC fuses replace each other?

DC fuses and AC fuses belong to the same type of current limiting fuse, and their appearance design and structure are very similar, but there are significant differences in the process of disconnecting current:

In the form of conducting AC sine waves through AC fuses, at each cycle's zero crossing, the minimum value of charge is prone to extinguishing the arc;

There is no zero crossing in any waveform of the DC fuse power supply. When the DC system is disconnected due to short-circuit fault current, the rapid vaporization of the fuse and the diffusion, adsorption, and cooling technology of quartz sand can force the arc to extinguish.

Therefore, this is much more difficult than disconnecting the AC arc from the power grid.

DC fast fuses can replace AC fast fuses, but AC fast fuses cannot replace fast fuses.

These two fuses can be distinguished based on their protection form. It can usually be divided into the following situations:

Current limiting fuse: A fuse is used to limit the current to the maximum load of the electrical appliance itself. For example, the charging voltage specification for a car is 12V, 15A (with fuses installed at 12V, 15A). If the current is too high (greater than 15a) causing electrical failure or disconnection, the fuse will disconnect for protection. For example, when the household charger is 110V, 5A (equipped with AC fuses or circuit breakers), the rated current will be disconnected to ensure electrical safety.

2. Overheating fuse: This fuse is different from the above fuses. It is controlled by heat and does not consider excessive current. However, if the electrical temperature exceeds the rated temperature, it will automatically disconnect to achieve protection function. Generally speaking, the rice cookers and electric stoves we use at home are based on this principle, and there are many examples to illustrate it.

(Taken from the Electrical Engineering and Electrical Learning Network)