1.75 A fast-blow SMD fuse in 0603
The Littelfuse 04671.75NRHF is a 1.75 A fast-blow surface-mount fuse from the 467 series, in a standard 0603 (1608 metric) package. It is rated for 32 V on both AC and DC circuits, with a breaking capacity of 35 A at rated voltage — meaning it can safely interrupt a short-circuit fault up to that level without rupturing the package.
What the ratings mean for the board
The 0.0903 melting I²t value tells you the thermal energy needed to open the fuse element — useful for sizing the fuse against inrush current from a capacitive input or a motor start. A cold DC resistance of 0.031 ohms keeps the voltage drop low at rated current, so the fuse does not heat the board unnecessarily in normal operation. The fast-blow response time means this fuse opens quickly on overcurrent, protecting sensitive semiconductor loads like a downstream regulator or a sensor module. The -55°C to 90°C operating range covers most indoor and outdoor equipment environments, though the fuse's current-carrying capacity derates near the upper end of that band.
Approvals and compliance
Supplied on Tape & Reel (TR) or Cut Tape (CT) for pick-and-place assembly. The 0603 footprint is a common industry standard, so no board layout change is needed if this replaces another 0603 fast-blow fuse in the same current rating.