Littelfuse - As Solar systems have grown in size, so have the corresponding voltage requirements. This increase in system voltage has typically been intended to minimize power loss associated with long conductor runs. Standard circuit protection devices are not designed to completely protect photovoltaic panels. However, the SPF series is UL Listed to safely interrupt faulted circuits up to this demanding voltage level.
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 Littelfuse SPF series was specifically designed for photovoltaic (PV) systems. This family of midget fuses, measuring 10 x 38mm, can safely protect PV modules and their conductors from reverse overcurrent conditions despite the associated challenges of DC power.
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