Despite the availability of more complex circuit-protection devices, a basic single-use fuse is sometimes what an application or an industry standard requires. The FT600 series of fuses from the ...
I have an RV Water Pump that operates on 12VDC and draws a maximum of 7 amps (from a deep-cycle lead-acid battery power source). The pump says to put a 10 amp fuse in the circuit for protection.