Breaking capacity and I²t coordination
The 0451005.MRL: Breaking capacity is 50 A at the rated voltage — sufficient for interrupting faults in low-power DC rails or AC control circuits without cascading failure. The melting I²t of 5.566 lets you coordinate with downstream semiconductors or PCB traces: a downstream component with an I²t rating above this value will survive the clearing event.
Package, mounting, and temperature range
Housed in a 2-SMD square end block package measuring 6.10 mm x 2.69 mm x 2.69 mm, this fuse is designed for automated pick-and-place assembly onto a PCB. The surface-mount footprint mates with standard solder pads; the square end block provides stable solder joint formation during reflow.
Regulatory approvals and sourcing posture
Approved by CSA, PSE, and UL — the UL listing confirms compliance with UL 248-14 for supplementary protectors, while PSE opens the Japanese market. Available in Tape & Reel (TR) or Cut Tape (CT) to match production volume.