Whether the functions of the functional parts of the fuses to be merged are related, and the fuses are merged only if the functions are related.
In order to make the structure of the design more beautiful and maintainability, before sharing the fuse, it is necessary to detail whether there is a connection between the functions of the functional parts. It is recommended to share the fuse only when the functional parts are connected.
When merging fuses, it is necessary to consider whether the power supply/communication signals of the functional parts are consistent;
This point means that the fuses can only be shared if the power supply types required by the functional parts are the same. For example, the functional parts connected to the normal power supply and the functional parts connected to the IG power supply cannot share the same fuse.
Whether there are important functional parts related to safety in the functional parts of the fuse to be merged, consider the impact of the blown fuse.
The choice of fuse sharing is related to the importance and safety level of electrical appliances. After the functional parts share the fuse, it is also necessary to consider the impact of the failure of other functional parts under the shared fuse when the shared fuse is blown due to the short circuit of a certain functional part after the fuses of the functional parts are merged. From this point of view, when it comes to safety functions, the fuses cannot be shared. For better illustration, the importance levels of functional parts are usually defined.