I am working on a board with 5 components and just as many voltage requirements (1.2V,1.5V,2.5V,3.3V and 5V). So, I really need to get the component costs down. For over-current protection, there are current sensing resistors (0.022 ohm) at the input stage. I found some 3.5A fuse with same resistance and cost 1/3 as much (economy of scale?).
Although the fuse won't protect at 1A, the switching regulator should kick in to shut down the circuit. Resistances are same after all. Would it be safe to use the fuse instead of current sensing resistors?