The Littelfuse 0603SFV100F/32-2 is a 1 A fast-blow fuse in the SFV series, rated for 32 VDC continuous. The 0.036 melting I²t tells you the energy needed to open the element — useful for sizing against inrush from a capacitive load or short-circuit pulse. Breaking capacity is 50 A at the rated voltage, meaning the fuse can safely interrupt a fault current up to that level without rupturing the 0603 ceramic body. That covers most low-voltage DC rails in telecom, instrumentation, and battery-powered gear.
Lifecycle reality and sourcing posture
Available through independent surplus and excess inventory channels. UL recognized, so compliance documentation is in place for legacy BOM positions.
0603 (1608 metric) surface-mount package, 1.60 mm x 0.80 mm x 0.35 mm.