1.8 A fast-blow — what the ratings mean for your board
The 0603SFV175F/32-2: Rated 1.8 A at 32 V DC, this fuse clears sustained overcurrents above that threshold in a fast-blow response — the 0.14 I²t melting integral means it opens quickly on a hard short, limiting the energy let-through to downstream components. The 35 A breaking capacity at 32 V DC means it can safely interrupt a fault current up to that level without arcing or rupturing — adequate for most low-voltage DC rails in telecom, industrial control, or battery-protection circuits. DC cold resistance is 0.095 Ohms — at 1.8 A the voltage drop is roughly 170 mV, and the I²R dissipation is about 0.31 W, which the 0603 body must sink into the PCB copper without exceeding the 125°C operating limit.
0603 footprint and UL acceptance
Housed in the standard 0603 (1608 metric) chip package — 1.60 mm x 0.80 mm x 0.35 mm — it mounts directly on the same pad layout as any 0603 resistor or capacitor, so no board respin is needed to drop it into an existing fuse position.