DIN Rail SPD DIN Rail SPD OVR T2 AC Surge Protective DevicesABB’s range of DIN rail surge protective devices (SPD) are designed to help discharge high current surges to help mitigate damage or destruction of critical power… OVR PV Type 2 Surge Protective DevicesABB’s OVR PV Type 2 DIN rail SPDs protect solar applications, up to 1500VDC, against sudden over-voltage from indirect and direct lightning events. Product Selector Ask an Expert Publications BrochuresCatalogs and Buyers GuidesData SheetsInstallation and InstructionPresentations Other Surge Protective Devices NEMA SPD Residential Surge Protective Devices Data Line SPDs