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The PLS-125P, reduces outages  by eliminating breaker outages, blown fuses in power supplies, and damage to power supplies due to voltage transients, surges, spikes and lightning.  
CATV Power Supplies  Eliminate breaker outages Can protect 20 amp  equipment: 
Designed to be Installed in power supply cabinets 110 volt electrical outlet
Full 3 line surge protection\ 36000 AMPS maximum spike current 540 Joules
PLS-125P  Plug-in power surge protector