For base please see stock number ; 144-1609 144-1609. RS Pro RFT Series DPCO Relays. RS Pro RFT series double pole miniature interface realys with LED indicator can be used to increase the functions in electrical enclosures, useful for industrial applications, machine building and HVAC. Features and Benefits. Double Pole 5A plug-in interface relays. LED indicator. Gold plated contacts. Bases for assembly on DIN Rail to be ordered separately