#### Rajinder1268

##### Full Member level 3

I am starting a automotive project, where the electronics will be powered from the 12V car battery.

The load current of my design is 0.9A maximum. I am looking to use a resettable fuse and have selected the following from Littel fuse

nanoASMDCH050F/24.

This has a working voltage of 24V (car battery charging can be at 14.4V), I trip of 2.5A. It is meant for automotive applications.

Looking at the rerating curve it mentions that at 80C, the trip current will fall to 60%. So 60% of 2.5A would be 1.5A, hence the circuit will have

protection at this temperature range. Does my theory look ok?

I am looking to add the fuse from the 12V supply, then the fuse and possibly looking at a reverse protection diode i.e. SBR Super Barrier Rectifier

I would appreciate any help or advice.