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04511.25MRL

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by John Lauer

Littelfuse 451 series very fast acting fuse, 1.25A 125V

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04511.25MRL

Littelfuse 451 series very fast acting fuse, 1.25A 125V.

Manufacturer datasheet ยท Mouser listing. Quote retrieved 2026-10-17: $2.24 each, 2,088 in stock; prices and stock can change.

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Original simplified dimensioned 451-series body; not manufacturer CAD. No current marking is represented. Native assembly and polarity inspection remain required. CAD contains no application circuit.

Apply the manufacturer's 25% continuous-current derating in addition to its ambient-temperature rerating curve. Review breaking capacity against the actual fault source; voltage/current ratings alone do not establish coordination.