Obsolete — the sourcing reality for this 3.15 A fast-blow fuse
The 04513.15NR: The part is a NANO² 451 series fast-blow fuse rated 3.15 A at 125 V AC/DC, with a 50 A interrupting capacity at those voltages. The 1.92 melting I²t means it tolerates moderate inrush pulses without nuisance opening — relevant for capacitive or motor-start loads on the same rail.
Board-fit and approvals — what the 2-SMD package carries
Surface-mount in a 2-SMD square end block package, 6.10 mm x 2.69 mm x 2.69 mm. The 0.0215 Ohm cold resistance keeps voltage drop low at rated current — about 68 mV at 3.15 A. Approved under CSA, cULus, and PSE — accepted in North American and Japanese regulatory jurisdictions. Supplied in Tape & Reel format, consistent with standard SMT pick-and-place assembly.