CITEL DS50PVS DIN Rail PV DC Power Surge Suppressors are designed to be installed inside of an enclosure and in very close proximity to the sensitive equipment that is being protected. These devices are Type 1CA or 4CA DC surge protection devices with either a 1000V or 1500V power rating and are wired in series or parallel with the load. The DS50PVS devices offer MOV+GSG technology with common-mode protection and are ideal for photovoltaic systems.