Obsolete — last-time-buy sourcing
The 0603SFV500F/32-2 is listed as Obsolete by Littelfuse. This means the manufacturer no longer produces it, and the only supply channel is independent surplus or broker inventory. For a BOM that needs a drop-in replacement, a board spin or a parametric search within the SFV series may be required — the 0603 footprint and 5 A / 32 V DC rating are the binding constraints.
5 A fast-blow in a 0603 body
Rated 5 A continuous at 32 V DC with a 35 A breaking capacity at rated voltage. The 35 A interrupt rating means it safely clears a fault current up to that level without rupturing the 0603 ceramic body — adequate for secondary-side protection in DC power rails where the available fault current stays under that ceiling. Fast-blow response time means the fuse element opens quickly on overcurrent, suited for protecting sensitive semiconductor loads that cannot tolerate even brief overcurrent stress. The melting I²t of 2.62 quantifies the energy needed to clear the fuse — useful for coordinating with downstream components and ensuring the fuse blows before the protected device fails. This resistance also sets the voltage drop the load sees under normal operation.
0603 surface-mount and UL recognition
Housed in a standard 0603 (1608 Metric) package for surface-mount assembly. The 0.063" x 0.031" footprint matches the common chip resistor and capacitor land pattern, so no special pad geometry is needed — pick-and-place and reflow are straightforward. UL recognized — the fuse carries an approval mark accepted in North American equipment.