Citel DLA Data Line DIN Rail Surge Protection Devices (SPDs) offer a 12VDC to 170VDC voltage range and are wired in series or parallel with the load. The UL497B listed, DLA devices are designed to be installed inside of an enclosure and in very close proximity to the sensitive equipment that is being protected. These DIN-rail mounted SPDs feature hybrid SAD-GDT technology, 1-channel (2W+Shield+G) network configuration, and screw terminal connections (22AWG to 16AWG) with an IP20, NEMA 2 rated modular construction.